This file is of historic interest. For recent changes in both ksh 93u+m and
the accompanying libraries, see the file NEWS in the top-level directory.
____

12-08-01  --- Release ksh93u+ ---
12-08-01  A bug that ignored interrupts for some builtins (e.g. cmdtst::grep)
	  that read from stdin has been fixed.
12-08-01  A bug that interpreted "cd .foo" as "cd foo" has been fixed.
12-07-30  Added automatic restart for EINTR for ioctl, tcgetattr, and tcsetattr.
12-07-23  A scoping error with namrefs to compound associative arrays has
	  been fixed.
12-07-20  A bug where builtin -d /path/foo deleted foo has been fixed.
12-07-18  A bug in which /dev/stdout did not work in command substitution on
	  some systems has been fixed.
12-07-17  A bug in which the restricted option set in a subshell prevented
	  some variables from getting restored when the subshell completed
	  has been fixed.
12-07-09  A bug in which the directory is not restored after a subshell changes
	  the name of the directory for subshells executed in the same process
	  has been fixed.
12-07-09  A bug in which file descriptors created with {n}< file were not being
	  closed has been fixed.
12-07-09  The 12-04-04 fix for cd .. was not correct causing cd /etc;cd .. to
	  remain in /etc.  This has been fixed.
12-07-02  A bug in which builtin name did now work for builtins found in a
	  library added by builtin -f lib has been fixed.
12-07-02  A bug in the edit modes which <tab> after a directory did not refresh
	  the input line has been fixed.
12-07-02  A bug in which an exit status > 256 corresponding to a signal was
	  not returned by a function to indicate a signal exit has been fixed.
12-06-28  Fix ulimit -a to list (Kibytes) instead of (kbytes).
12-06-27  Fix uninitialized data reference for <CR> as first char in --vi mode.
12-06-26  The formatting of printf "%q" for multibyte locales has changed to
	  output using \u[xxx] format for valid wide characters.
12-06-25  The size limit for read -N and read -n has been raised to INT_MAX.
12-06-22  A bug in which an exit trap set in a subshell might not be triggered
	  when the last command was a simple executable has been fixed.
12-06-22  A bug which could cause the shell to hang when a coprocess exits
	  while a command inside a command substitution is reading from it has
	  been fixed.
12-06-21 +ksh new accepts for commands of the form for i; <nl> do;...;done
12-06-19  Tab completion after a / when there is only one match not completes
	  with that match rather than generating a menu of matches.
12-06-19  A bug in which patterns containing {...} where not processed
	  correctly inside ${var/pattern/string} has been fixed.
12-06-18  Code modified to eliminate fts_notify variable.
12-06-15  Change the .paths plugin/builtin library variable name from
	  BUILTIN_LIB to PLUGIN_LIB to prevent new plugin_version() aware
	  -lcmd from causing older non-plugin_version() aware ksh to dump core.
12-06-14  builtin without argument no longer lists .sh.tilde as a built-in.
12-06-12  For assignments if the form x=(foo bar), foo is only check for an
	  alias if it is float, integer, compound, or nameref.
12-06-12 +The shell supports 64 bit i-nodes even for 32 bit binaries.
12-06-11  A bug with >; redirection systems for which vfork() was the same a
	  fork() has been fixed.
12-06-11  A bug in path lookup that ignored buffer boundaries has been fixed.
12-06-08  typeset -a var and typeset -A var, first unset var when var is
	  a compound variable.
12-06-08  A bug in which running shcomp on a program containing namespace
	  could core dump has been fixed.
12-06-06  A bug in which unset of an associative array of compound variables
	  did not completely unset the variable has been fixed.
12-06-06  A bug in which exporting left or right justified fields could lose
	  the field width has been fixed.
12-06-06  A bug on Solaris 11 in which >; did not work for /dev/null was fixed.
12-06-05  A race condition which occurred when stopping a builtin command
	  invoked from a subshell has been fixed.
12-06-05  A bug with appending elements to an empty indexed array has been
	  fixed.
12-06-04  A bug in which continuing a stopped builtin could cause it to
	  terminate has been fixed.
12-06-04  By default, builtins added at runtime will restore the current
	  directory if they are killed or stopped.
12-06-04  A bug in handling \\ in read has been fixed.
12-05-31  Use getrlimit64/setrlimit64 on systems that support it.
12-05-31  Fix 64 bit big-endian arithmetic bug that mishandled NaN and Inf.
12-05-31  Handle ECONNRESET like EPIPE.
12-05-31  Change .paths parse to use only the last BUILTIN_LIB from the top
	  and treat BUILTIN_LIB value as a ':' separated list of lib names.
12-05-29  Fix BUILTIN_LIB binding bug that ignored subsequent lookups.
12-05-29  shtests: --nocompile omits the compile test and --compile does only
	  the compile test.
12-05-25  A command substitution containing a here-document that itself contains
	  a here-document no longer hangs.
12-05-24  When the redirection operator >; is directed to a symlink, it now
	  overwrites the file named by the link rather than the link.
12-05-21 +Added printf formats %(type)q where type can be html, url, pattern,
	  ere, or csv.
12-05-18  A bug with appending elements to an indexed array has been fixed.
12-05-18  The exit status from getopts --man interactively was 0 instead of 2
	  and has been fixed.
12-05-18  Another bug with SHOPT_EDPREDICT which could cause a core dump has
	  been fixed.
12-05-17  A bug with fixed size arrays which could cause a core dump has been
	  fixed.
12-05-17  A bug in which the here-document <<< $(<file) was not processed
	  correctly has been fixed.
12-05-15  The default value for -L, -R, and -Z when the size was not set was
	  incorrectly defaulting to 1 and has been fixed.
12-05-15  A bug in which a subshell of the form (name=value exec ...) could
	  coredump when name is an environment variable and xtrace is on has
	  been fixed.
12-05-15  Fixed a .paths bug in which only the first BUILTIN_LIB assignment worked.
12-05-14  Arithmetic expressions and subexpressions that are not floating point
	  now treat -0 as 0, so that $((-0)) is 0 and $((-0.0)) is -0.
12-05-11  'unset .sh' now fails with a readonly message instead of a coredump.
12-05-11  A bug which left an associative array arr containing one element in
	  the wrong state after expanding with ${arr[@]} has been fixed.
12-05-10  A bug in which typeset -f did not display options that called getopts
	  has been fixed.
12-05-08  Fixed a number of potential bugs uncovered by valgrind.
12-05-08  A bug in which typeset -b -Z10 var did not initialize var to the
	  empty string has been fixed.
12-05-07  A bug in which the exit value of an interactive shell could be
	  affected by the evaluation of the PS1 prompt has been fixed.
12-05-04  A bug in which x=() was not unsetting the old value of x before
	  creating an empty compound variable has been fixed.
12-05-01  A bug in vi edit mode in which after <ESC>^V, the terminal was not
	  restored to insert mode after a character is entered has been fixed.
12-04-27  A bug in which old attributes were not cleared when assigning a
	  value using typeset has been fixed.
12-04-26 +Enabled multiline editing by default.  set +o multiline can disable.
12-04-25  The 12-04-17 PATH fix created a new bug which was fixed.
12-04-25  Fixed a big memory leak problem in which unsetting compound variables
	  did not free all the space.
12-04-25  A bug in which test ! ! ! was treated as an error has been fixed.
12-04-24  A bug with print -v for a compound variable that contained fixed
	  arrays which prevented the output from being used again as input
	  has been fixed.
12-04-23 +kill provides the STKFLT signal on systems that support it.
12-04-23 +The -L option was added to kill.  The -L option is the same as -l
	  except that without arguments the output format is in the form of
	  a select menu.
12-04-23  A bug in which the exit status for an interactive shell was always
	  0 has been fixed.
12-04-20  Entering blank lines interactively no longer resets the exit status.
12-04-18  A bug in file completion in which the second tab completion on a file
	  would list the completion rather than inserting the completion has
	  been fixed.
12-04-18  A bug in which "${arr[@]:i:j}" and "${@:i:j}" generated the empty
	  string when i was a valid subscript and j was <=0 rather than
	  generating nothing has been fixed.
12-04-17  A bug in which read -d delim from a terminal did not respond to
	  interrupt and did not terminate when the delimiter was entered
	  has been fixed.
12-04-17  A bug in which a directory in PATH containing a .paths file that
	  contains a line with FPATH=dir, where dir does not exist could
	  cause the path search to fail has been fixed.
12-04-16  A bug in which $(trap -p) did not display traps such as ERR and
	  DEBUG that are not associated with signals has been fixed.
12-04-11  A bug in which unsetting a variable did not unset attributes when
	  the variable did not have a value has been fixed.
12-04-11  A bug in which read -A for an array whose index is an enumeration
	  type, lost the enumeration type has been fixed.
12-04-10  Shared libraries loaded from a library named by a BUILTIN_LIB= found
	  in a .paths file found in a directory on PATH now add builtins that
	  are associated with the directory in PATH containing the .paths file.
12-04-09  Increased I/O buffer sizes for better performance.
12-04-09  A bug in which the leading 0 was stripped from $x, when $x contained
	  a hexadecimal constant inside an arithmetic expression inside
	  a for or while loop.
12-04-06  Modified namespaces to hand variables FPATH, PATH, and OPTIND that
	  are defined in name spaces appropriately.  This also fixed OPTIND
	  and OPTARG processing for functions.
12-04-04  A bug in which cd .. fails when the current directory has been
	  renamed has been fixed.
12-04-02  Made some namespace changes and added a regression test.
12-03-30  A bug with namespaces in which PATH and FPATH set in a namespace was
	  not restored when leaving the namespace has been fixed.
12-03-29  A bug in which appending an indexed array onto an array without elements
	  caused the first element to be 1 rather than 0 has been fixed.
12-03-29  A bug which could cause a core dump when copying a large indexed array
	  has been fixed.
12-03-28  The shell now generates an error message when the sizes with L, Z, and
	  R are > 32767 on 32 bit binaries instead of generating a core dump.
12-03-28  A bug in left and right justification in which the width of invalid
	  characters was not taken as zero has been fixed.
12-03-26  A bug in which typeset -p ref, when ref is a reference to an index
	  array element did not display the subscript has been fixed.
12-03-23  A bug in lowercase and uppercase fields when expanding ${name:=val}
	  when name is the empty string has been fixed.
12-03-22  A namespace bug in which a type t defined in namespace foo could not
	  be referenced outside the namespace as .foo.t has been fixed.
12-03-22  A bug in name reference scoping in which a name function called from
	  another function is pass a name reference to a compound variable
	  instance to be created and the compound variable is in the global
	  scope.
12-03-22  A bug in which ${ref[@}} did not behave like ${arr[i][@]} when
	  ref is a name reference to arr[i] has been fixed.
12-03-21  A bug in which assigning a compound variable into arr[i], where
	  arr[i] is an array variable did not work correctly has been fixed.
12-03-21  A bug with multidimensional indexed arrays in which ${arr[i][j]}
	  could generate a bogus error message when i was > 9 has been fixed.
12-03-21  A bug in which typeset v=foo, typeset -p v[0] generated a core dump
	  has been fixed.
12-03-20  A bug in vi edit mode in which the sequence bar<ESC>0i<ESC>l left the
	  cursor on the b rather than the a has been fixed.
12-03-20  A bug which caused a core dump when defining a type with a field
	  as ' integer -a data=([0]=0)' has been fixed.
12-03-19  Using typeset -a array when array is an associative array not
	  generated an error message.
12-03-19  typeset +a, typeset +A, and typeset +C not displays the variables
	  with the attributes a, A, and C respectively instead of an error.
12-03-19  A bug in which typeset -pC, typeset -pa, and typeset -pA output all
	  variables rather than those of type C, a, or A only has been fixed.
12-03-18  A bug in which unset foo where foo is a name reference to a compound
	  variable defined inside a function is not unset has been fixed.
12-03-18  A bug with SHOPT_EDPREDICT which could cause a core dump when the
	  list of matches became empty has been fixed.
12-03-15  The assignment, typeset -C foo=(a b c) now generates a syntax
	  error since a is not an assignment command.
12-03-16  A bug in which an unset discipline from a variable defined in a
	  subshell is not invoked in the subshell has been fixed.
12-03-08  The assignment typeset -a (x=1 y=2) now creates an indexed array
	  of two elements rather than an array of one element which is
	  a compound variable.
12-03-02 +The vi and emacs edit modes now list all the entries in a directory
	  when entering a <tab> for completion after a /.
12-03-02  A bug in which a program that exits with value 12 when called
	  from a command substitution in which standard output has been
	  redirected caused the shell to hang has been fixed.
12-03-01  A bug in which the shell could not parse [[ ']' == ~(E)[]] ]]
	  has been fixed.

12-02-29  --- Release ksh93u+ ---
12-02-29  A bug in which ~user expanded first in a subshell prevented it
	  from expanding later in a program has been fixed.
12-02-29  A bug which could lead to a core dump when more than four shared
	  libraries were added with the builtin command has been fixed.
12-02-29  Fixed a few bugs which caused SIGCHLD to be blocked preventing
	  background jobs from being reaped until a foreground job was run.
12-02-27  A bug in which sh -c for a simple command caused a fork() has been
	  fixed.
12-02-27  A timing bug on systems such as AIX that doesn't support vfork()
	  that could cause the exist status to get lost has been fixed.
12-02-22  A private file descriptor that was not close-on-exec for a command
	  substitution and has been fixed.
12-02-14  A bug in which ^Z did not stop a pipeline when the last component
	  was a shell built-in has been fixed.
12-02-14  getconf("PATH") used to initialize ed(1) path.
12-02-13 +In earlier version read from standard input would fail when called
	  from the KEYBD trap.  Now read options -N, -n, and -t should work
	  when called from a KEYBD trap.
12-02-13  If FCEDIT is not set and fc is invoked without the -e option,
	  ed will be invoked if found instead of /bin/ed.
12-02-10  Another bug in the saving and restoring of IFS in a subshell
	  that caused a core dump has been fixed.
12-02-08  A bug in which .sh.fun disciplines could be cleared after a
	  function completes has been fixed.
12-02-08  A bug in job control in which the foreground process group was not
	  set correctly after restarting a stopped pipeline has been fixed.
12-02-07  A bug in which numbers with leading zeros could be treated as
	  octal constants outside of ((...)) has been fixed.
12-02-06  A bug in arithmetic with compound variables containing multiple
	  array elements has been fixed.
12-02-02  A bug in the ulimit option table was fixed.
12-01-26  A bug in which a set command that did not change monitor could
	  affect the behavior of the monitor when monitor mode is on is fixed.
12-01-21 +You can now test whether the shell implements a math function using
	  typeset -f .sh.math.name, where name is the name of the function.
12-01-21  A bug in which typeset -L and typeset -R did not handle multibyte
	  characters correctly has been fixed.
12-01-20  A bug that could cause the shell to hang waiting for an incorrect
	  job pid has been fixed.
12-01-19  A memory leak which occurred for a nested command substitution has been
	  fixed.
12-01-17  A bug in which typeset -u PS1 could enable the uppercase attribute
	  for some other variables, for example, HISTFILE has been fixed.
12-01-16  A bug in which .sh.match was not correct after a substring match when
	  the replacement string contained a substring match has been fixed.
12-01-12 +Files that are sourced from profile files are now read and executed
	  one command at a time so that alias definitions take effect as they
	  do for profile files.
12-01-12  A bug in which whence -p would find a function if one existed and
	  there was no command of that name on PATH.
12-01-11  Change b_* prototype (int, char**, void*) => (int, char**, Shbltin_t*).
12-01-05  A bug in which read was not terminating for a signal that had a trap
	  set has been fixed.
12-01-01  A timing problem with >; has been fixed.
12-01-01  A macro expansion memory leak has been fixed.
11-12-26  A bug in array assignments of the form arr=( $arr[i] ...) in which
	  arr was not unset before the assignment has been fixed.
11-12-20  A number of code changes were made based on the results of errors
	  indicated by static code analysis.
11-12-13  In vi edit mode a literal <TAB> can now be entered by preceding it
	  with a backslash.
11-12-13  When tab is entered for completion after a ' or ", the ' and "
	  characters are no longer deleted.
11-12-07  A bug in which a program in the current directory with a . in the
	  name could fail to execute when both PATH and FPATH end with :. has
	  been fixed.
11-12-07  I fixed a bug in which a variable expansion in a large here-document
	  could be expanded to a null string.
11-12-06  An optimization to read was added in the case the read command
	  was redirected from a file.
11-12-06  Changes were made to make the line limit for read unlimited by
	  default.
11-12-05  A bug in which unsetting an array variable did not completely clear
	  the variable in some cases has been fixed.
11-12-02 +The printf alternative character # when applied to the %q format will
	  quote argument in a form suitable for a field in a .csv format file.
11-12-02 +A -S option was added to read to be able to read .csv format files.
11-11-28  A bug in which redirection of standard error in a function called from
	  command substitution caused standard error to be lost has been fixed.
11-11-21  [[ (-n foo) ]] no longer requires a space before (.
11-11-11  The readonly attribute for a variable now applies to compound
	  assignments to that variable.
11-11-07  Changes were made to reduce the stack size to allow deeper function
	  recursion.
11-10-10 +Added alternate flag to printf %H for encoding of URI's.
11-10-10  A bug which could lead to a core dump when the shell was invoked
	  with more than twenty-five open files has been fixed.
11-10-06  A bug in the scoping of name references in functions called by other
	  functions has been fixed.
11-10-05  A bug in which wait on a pid may return the exit status of an
	  earlier background job with that pid instead has been fixed.
11-09-22  A bug in which a read timed out with TMOUT did not always restore
	  the terminal state has been fixed.
11-09-21  An optimization that allowed the last command in a script to use
	  the same process id as the script has been eliminated.
11-09-21  Added letoctal option that enables the let command to recognize
	  octal constants starting with 0.
11-09-20  A bug in which ${var.} could cause a core dump has been fixed.
11-09-20  A bug with SHOPT_EDPREDICT when neither vi nor emacs was enabled for
	  lines beginning with # when in a multibyte locale has been fixed.
11-09-20  A bug in emacs edit mode with SHOPT_EDPREDICT that would cause
	  history searches matching comments lines to generate predictions
	  has been fixed.  Only user typed comment lines generate predictions.
11-09-20  A bug in emacs edit mode with a search that matches a comment line
	  that could cause a core dump has been fixed.
11-09-16  A bug in which a command name ending in .. could cause the shell to
	  abort has been fixed.
11-09-16  The characters ! + - % and @ in file names are no longer escaped with
	  file name completion.
11-09-13  The let command no longer treats numbers starting with 0 as octal
	  constants.
11-09-08  A bug in which printf "%R" could cause a core dump for invalid shell
	  patterns has been fixed.
11-08-09  With set -u, ${var#pattern} reported that var was unset for special
	  variables.
11-08-03  A bug in which the shell did not preserve the exit status for a
	  coprocess has been fixed.
11-08-02  A bug in the saving and restoring of IFS in command substitution that
	  caused a core dump has been fixed.
11-07-21  Modified the 10-08-27 bug fix so that background jobs started in for
	  and while loops created interactively generate completion messages.
11-07-20  I fixed a bug in here documents in which multi-byte characters that
	  crossed buffer boundaries were not processed correctly.
11-06-22  The shell compiler now supports process substitution.
11-06-22 +Added code to support process substitution on systems that do
	  not supply the /dev/fd directory.
11-06-21  Fixed extraneous jobs Done messages when builtin is at the end of a
	  pipeline.
11-06-20  Fixed two regression tests.
11-06-20  Fixed a bug introduced on last update.
11-06-14  A bug with pipefail in which the shell would wait for background
	  jobs to complete has been fixed.
11-06-09  A bug which caused the options.sh regression test to fail on OS390
	  Linux has been fixed.  The bug could also have affected other systems.
11-06-07 +A number of changes to support the still undocumented namespace option
	  have been added.
11-06-06  A bug in which command substitution of eval would hang when it had
	  standard error redirected to standard output has been fixed.
11-06-01  A bug in case statement fall through (;&) ignoring set -e was fixed.
11-06-01  A bug in which creating a left or right justified upper or lowercase
          variable with an empty string has been fixed.
11-06-01  A bug in which the .paths directory wasn't read when a subshell was
	  executed before any other command has been fixed.
11-05-31  The shell now gives an error when a type variable is assigned to
	  an array instance when the array has been declared a compound variable
	  array.
11-05-31  A bug in which typeset -m of an array instance did not remove the
	  original instance has been fixed.
11-05-28  A bug in which typeset -m dest=src fails when src and are passed as
	  name references was fixed.
11-05-28  A bug in which typeset -m "c.board[1][i]=el", where el is a compound
	  variable core dumps has been fixed.
11-05-28  Two bugs in the display of arrays of compound variables with print -v
	  have been fixed.
11-05-27  A bug with command substitution in the Shift JIS locale has been
	  fixed.
11-05-25  A bug in which unset -f foo, called within function foo could cause
	  the shell to core dump has been fixed.
11-05-24  A bug in unsetting arrays of compound variables that could lead to
	  a core dump has been fixed.
11-05-24  A scoping bug in with typeset -m for variables passed as references
	  has been fixed.
11-05-09  A bug in which 'typeset +p array[$i]' in a subshell could cause an
	  exception has been fixed.
11-05-03  Two more scoping bugs with name references and read -C were fixed.
11-05-03  A potential race condition which occurs when here-documents are
	  processed in asynchronous blocks has been eliminated.
11-05-02  Another scoping bug with name references defined in a function has
	  been fixed.
11-05-02  A bug in which the shell discards saved exit status of a job if it is
	  followed by a subshell execution has been fixed.
11-04-28  The shell now checks for numerical overflows with process ids.
11-04-28  Another scoping bug with compound variables defined by name references
	  inside a function has been fixed.
11-04-28  A bug which caused a core dump on 32 bit systems with the basic.sh
	  regression test has been fixed.
11-04-27  A scope binding error for name references has been fixed.
11-04-27  Assignment of compound variable to compound array element by name
	  is now working.
11-04-26  I fixed a bug with SHOPT_FIXEDARRAY compilation that could cause
	  an a core dump for not fixed arrays.
11-04-25  A bug in the references to two dimensional compound arrays has
	  been fixed.
11-04-20  A bug in which a name reference to a multidimensional indexed array
	  index, nameref x=foo[3][4], did not work correctly has been fixed.
11-04-18  Changes were added to allow fixed size arrays of variable sized
	  objects when the SHOPT_FIXEDARRAY compile option defined on 10-09-28.
11-04-18  A bug in which name references to array elements could fail has
	  been fixed.
11-04-15 +A compile option, SHOPT_2DMATCH, has been added which causes
	  .sh.match to be a two dimensional array after ${var//pat/str}
	  where the first dimension is the pattern number and the second is
	  the match instance.
11-04-11  A bug in which readonly var, where var is exported could cause var
	  to be unset has been fixed.
11-04-06  A tokenizer bug in which ${x/{3}(\d)/ } would cause an infinite
	  loop has been fixed.
11-04-05  A bug in which ${!x.} could cause a core dump has been fixed.
11-04-04  A bug in which cleaning out the history file could terminate before
	  keeping all the recent history events has been fixed.
11-03-29  A bug in which ${#array[@]} was 1 rather than 0 after issuing
	  typeset array[7] has been fixed.
11-03-29  The subscript out or range message for fixed arrays has been fixed.
11-03-29  A bug in which suspend could cause a core dump has been fixed.
11-03-24  For the showme option added 09-09-09, commands beginning with a ;
	  inside an arithmetic for loop, no longer produce syntax errors.
11-03-18  A bug in _WINIX ~domain/user expansion has been fixed.
11-03-16  A bug in the pipefail option which could cause a script to hang
	  has been fixed.
11-03-12  The shell no longer treats ${##pattern} as a syntax error.
11-03-11  A bug in typeset -u on systems that don't supply the towctrans()
	  function has been fixed.
11-03-11  A bug in which a compound assignment of the form var[sub]=(...)
	  would evaluate sub for each assignment has been fixed.
11-03-07  A bug in which reassigning a compound variable to an associative
	  array index could incorrectly increase the count of the number
	  of elements has been fixed.
11-03-04 +The tilde expansion on Windows has been modified to handle user
	  names of the form domain/user so that ~domain/user now expands
	  to the home directory of that domain user.
11-03-03  A bug in which the width of the prompt was calculated incorrectly
	  which cause the wrong line length for edit commands has been fixed.
11-03-02  A bug in which a global variables set from within a function inside
	  a subshell can leave side effects in parent shell has been fixed.
11-03-01  A bug in which whence -a could dump core when the first match
	  was due to : in PATH and the program was in the current directory.
11-02-28  A bug in emacs mode with SHOPT_EDPREDICT (added on 10-05-20) which
	  disabled prediction on a line starting with # when the cursor was not
	  at the end of line has been fixed.
11-02-28  The output format for compound variables with set has been fixed.
11-02-25  A bug which could lead to a core dump occurred when a shell script
	  without #! is invoked by name from a parent shell that has name
	  references defined and the script creates name references of the
	  same name.
11-02-21  The shell now fails with a syntax error when a here-document in a
	  command substitution is not completed before the closing ), for
	  example, $( foobar <<! )
		here_doc
	  !.
11-02-18  A bug in which the value of $0 in a function defined by name()
	  was changed to name has been fixed.
11-02-17  A bug in which the declaration typeset var[100] did not work
	  correctly has been fixed.
11-02-15  A bug in which [[ -v sh.match ]] did not work correctly has been
	  fixed.

11-02-08  --- Release ksh93u  ---
11-02-08  A bug in which opening standard output after it has been closed with
	  exec 1>&- doesn't work has been fixed.
11-02-07  A bug on some systems for which a command substitution could hang
	  has been fixed.
11-01-28  A bug in file name completion for files containing both multibyte
	  characters shell special characters has been fixed.
11-01-18  The .sh.match variable now shows elements that do not match as
	  as not set rather than an empty string.
11-01-18  A bug with typeset -m of an array into an element of an indexed
	  array has been fixed.
11-01-13  A bug in handling of arrays of compound variables inside ((...)) which
	  reported a syntax error been fixed.
11-01-10  A bug in arithmetic assignment operators of the form op= for array
	  variables when the same array was referenced on the left and the
	  right hand side with different indices has been fixed.
11-01-10  A bug in which the output of time was lost when { time...;} 2>&1
	  occurred inside command substitution has been fixed.
11-01-07  [[ -v sh.match[i] ]] was returning false when sh.match[i] was set.
11-01-05  Added and modified warning messages with sh -n.
11-01-02  Fixed bugs with typeset -l/-u/-M and arrays.
10-12-28  Fixed a bug with typeset -l/-u/-M values in arithmetic expressions.
10-12-26  Fixed a time parsing bug in sleep and localeconv() initialization.
10-12-23  Prevented the shell from generating a core dump when it sends itself
	  a termination signal because the last command terminated with that
	  signal.  This prevents a core dump to be overwritten by the shell.
10-12-22  A bug in the expansion of  ${A[@]} ${B[@]}, introduced in 10-12-01
	   when A="" B=B has been fixed.
10-12-21 +Use MS_3D in b_vpath() for setting Win32 WoW mount defaults.
10-12-17  A bug in the expansion of ${var:i:j} which caused a core dump when
	  i > ${#var} has been fixed.
10-12-16 +sleep now treats . as decimal point even in locales that use comma.
10-12-16 +typeset -M mapname was added to generalize on toupper and tolowwer
	  mapping as provided with wctrans().
10-12-10  A bug in which typeset -l displayed namespaces as well as lower case
	  variables has been fixed.
10-12-06  A bug in which a pipeline could terminate prematurely for a pipeline
	  whose right hand side is a builtin, and whose left hand side ends in
	  a simple command that has standard output redirected has been fixed.
10-12-06  A bug in hexfloat assignments when the right hand side is a string
          variable starting with 0x has been fixed.
10-12-01  A bug in the expansion of ${$1+"$@"} which causes the last positional
	  parameter to disappear when it is empty has been fixed.
10-12-01  A number of changes were made to reduce the startup time.
10-11-29  When wait is interrupted by a signal that is caught, it now exits
	  with a non-zero exit status.
10-11-29  When a variable is used directly in an arithmetic expression,
	  leading zeros no longer cause the value to be treated as an
	  octal constant.  This was true in previous versions for justified
	  variables.
10-11-29  An incorrect warning message was eliminated with the -n option for
	  arithmetic expressions with associative arrays.
10-11-29  Some changes were made to slightly reduce startup time.
10-11-24  A bug in which a name reference is make to arr[0] when arr is not
	  an array has been fixed.
10-11-23  If a type definition is made without a compound variable assignment it
	  produces an error message and no longer shows up as a defined type.
10-11-22  The handling of \ inside [...] for shell and ~(E) patterns has
	  been fixed.
10-11-22  A patch was made to pfsh to handle an error case.
10-11-22 +Modified types defined in namespace so that they do not clash with
	  types in other namespaces.  Types can be referenced using
	  .namespace.typename.
10-11-22  A bug which caused functions addressed as .namespace.funct to not
	  work has been fixed.
10-11-22  A bug in which if nr was a name reference to an unset associative
	  array subscript, then ${!nr} did not output the subscript correctly
	  has been fixed.
10-11-18  A bug in which shcomp -n was not processing double quotes correctly
	  has been fixed.
10-11-18  Fixed a bug in which typeset -T foo; typeset -T could cause a
	  core dump.
10-11-17  Fixed a bug in which the error message for set -u could come out
	  garbled.
10-11-17  Modified the parser so that typeset -a var=(...) no longer checks
	  the first index for aliases and reserved words.
10-11-17  A bug in which a subshell command consisted of only a for or until
	  command has been fixed.
10-11-16  Fixed a bug in which typeset -u would display namespace variables
	  as well as upper case variables.
10-11-16  A bug which could cause a core dump when unsetting a type variable
	  when there are references to type elements has been fixed.
10-11-15  A bug which could cause a core dump when unsetting a compound
	  array variable when there are references to array subscripts has
	  been fixed.
10-11-15  A bug in which using typeset -m to move an indexed array instance
	  to another array could cause the array to display incorrectly has
	  been fixed.
10-11-12  A bug in which the unset discipline function for a type is called
	  when the type is initialized has been fixed.
10-11-12  The sequences \< and \> are now preserved after patterns containing
	  ~(E) in ${var/pattern/string} expansions.
10-11-11  A bug in typeset -m when the variables were compound array instances
	  has been fixed.
10-11-10  A bug in output of a compound variable with types containing types
	  has been fixed.
10-11-10  Fixed ``name=value export [-p]'' to list environment.
10-11-09  shtests resets SIGPIPE to SIG_DFL for all tests.
10-11-09  Fixed a bug in expansion of $"..." when used in assignments.
10-11-09  Fixed a getaddrinfo() memory leak that didn't call freeaddrinfo()
	  after an interrupt.
10-11-08  Modified the behavior of set -u so that the shell terminates with
	  error message when when var is unset with ${!var} and ${#var}.
10-11-02  Fix a bug in which a signal received while in a subshell could be
	  ignored.
10-10-26  Fix a bug where terminal interrupt was ignored while in vi/emacs
	  edit search mode.
10-10-26  Fix $'a\0b'c to expand to 'ac'.
10-10-26  Provide user defined round() if not in <math.h>.
10-10-26  Fix bug where $((undefined_function(1))) dumped core.
10-10-22  Provide user defined iszero() if not in <math.h>.
10-10-22  Fixed a bug with BGX compile option that could cause the shell to
	  hang.
10-10-22  Fixed a bug with user define math function on systems for which
	  char is unsigned.
10-10-21  A bug in which function autoloaded in a function leaves a file open
	  has been fixed.
10-10-20  Modified the behavior of set -u so that the shell terminates when
	  when var is unset with ${var op string} when op is #, % or /.
10-10-20  Fixed a bug with the AUDIT option in which the audit file was not
	  not close-on-exec.
10-10-20 +Made a number of changes and fixes for the NAMESPACE compile option
	  which as added on 10-06-09 but some problems still remain.
10-10-15  Fixed a bug in which arithmetic functions (added on 10-03-24) did
	  not work when the function definition was in the same compound
	  command in which the function was referenced.
10-10-13  A bug in which creating an associative array of compound variables
	  with no members as an element of a compound variable did not work
	  has been fixed.
10-10-08  A bug in which killing the last command in a function defined
	  with function name, terminated the calling script has been fixed.
10-10-08  A bug which could cause a core dump if IFS is unset inside a function
	  has been fixed.
10-10-07 +To reduce unwanted side effects, invoking typeset without the export
	  option and without an assignment now causes the variables to be unset
	  if the variable is inherited from the environment.
10-10-06  The closing brace for ${ command } is now a token no matter what
	  character follows it.
10-10-04  The change for $'...' expansion on 10-08-09 did not expand parameters
	  contained in the error message and this has been fixed.
10-10-04  A bug in which a declaration of indexed array (-a) in a type
	  definition would be displayed as a compound indexed array (-C -a)
	  has been fixed.
10-09-30  The C99 math function ldexp has been added.
10-09-30  A bug with two dimensional arrays with expansion of the form
	  ${ref[0..5]} where ref is a nameref to array[i] has been fixed.
10-09-29  A bug in which an eval with redirections invoked from a dot script
	  would not restore the file has been fixed.
10-09-29  A bug in which loading a function from FPATH could leave a file
	  descriptor open has been fixed.
10-09-28 +A new compile option SHOPT_FIXEDARRAY has been added and is being
	  evaluated.  It allows fixed sized indexed arrays be to defined
	  using "typeset array[dim1][dim2]...[dimn]".  Fixed sized arrays
	  are used the same way indexed arrays are.  Currently, only fixed
	  arrays of fixed objects (float, int, and justified objects) are
	  supported.
10-09-22  A bug which could cause an exception when a function with static
	  variables was redefined has been fixed.
10-09-21  A bug in the processing of (command&) which created a job in the
	  parent process has been fixed.
10-09-21  A for loop optimization bug with arithmetic expression evaluation
	  has been fixed.
10-09-21  A bug in which a recursive function containing a pipeline could
	  lead to an exception fixed after 8 levels of recursion has been
	  fixed.
10-09-18  A bug in which the count of elements in an array was wrong leading
	  to an exception has been fixed.
10-09-13  A bug which occurred when both xtrace and showme options where
	  specified in which the xtrace option disabled showme has been fixed.
10-09-13  A bug in which creating a reference to an array variable with any
	  elements could cause subsequent array elements to be treated as
	  compound variables has been fixed.
10-09-09  A bug which caused ((c.ar[x][y])) to be treated as a syntax error
	  has been fixed.
10-09-08  A bug in the processing of references to multidimensional arrays
	  in arithmetic expressions has been fixed.
10-09-08  A bug in the handling of multidimensional arrays which caused
	  the number of elements in each dimension to be incorrect has
	  been fixed.
10-09-07  The change for messages on 10-08-09 did not handle message in
	  assignments and this has been fixed.
10-09-07  A bug in the indentation of compound variables in arrays when
	  output with print -v has been fixed.
10-09-07  A rare bug with indexed arrays when assigned a null string that could
	  cause a core dump has been fixed.
10-09-03  A number of changes were made for jobs pools.
10-08-31  typeset -p was modified to output name references after other
	  variables so that the output could be used as input.
10-08-31  A bug with typeset -p in which variables with attributes but
	  without attributes were not displayed correctly has been fixed.
10-08-27 +When running a subshell, the current pool is unset.
10-08-27  A bug in which jobs started from within for or while lists in
	  interactive shells could generate completion messages has been fixed.
10-08-25  Fixed a couple of bugs related to job pools.
10-08-24 +[[ -e /dev/xxx/ ]] can be used to check whether special files of
	  those names are handled by the shell.
10-08-24  A bug in the running of a compiled dot script in which only the
	  first command was executed has been fixed.
10-08-23  A bug which sometimes caused a core dump with a configure script
	  has been fixed.
10-08-20  A bug in command substitution which caused a configure script to
	  hang has been fixed.
10-08-19  Eliminated unnecessary ; from output of compound variable with
	  typeset -p.
10-08-17  Fixed a bug in command substitution in which under certain
	  circumstances a file whose size is a power of 2 plus one, and the last
	  character was not a new-line, could cause memory corruption.
10-08-13 +Added static discipline functions to type similar to C++ static
	  class functions.
10-08-11  A bug in time when applied to a pipeline in which the shell did
	  not wait for all elements of the pipeline to complete has been fixed.
10-08-11  Restored sh_fmtq() quoting to not quote NAME= in NAME=VALUE.
10-08-09 +Modified the expansion of message strings, $"...", so that they
	  are expanded each time they are referenced rather than expanding
	  them when the script is compiled or read in.
10-08-06 +The process id for jobs in job pools is now of the form poolname.n
	  where n is the jobid in that pool.  Commands that accept job names
	  or numbers now understand names in this format.
10-08-05  A bug in which an assignment from within an arithmetic expression
	  inside a function would create a local variable has been fixed.
10-08-04  A bug in the expanding of variables whose names contain multibyte
	  characters has been fixed.
10-08-04  A bug which caused an exception when processing scripts compiled
	  with shcomp -n has been fixed.
10-08-02  Tests using very small buffer sizes uncovered a number of bug most
	  connected with here documents which have been fixed.
10-07-27  The format modifier , used for digit grouping with d and f formats
	  has been documented.
10-07-26  cd '' now produces and error rather than changing to the current
	  directory.
10-07-26  A bug in multi-byte locales which the last character of a
	  multi-byte character is a \ or pattern character which could occur
	  when the character was the last character of a command substitution
	  has been fixed.
10-07-23  Another bug in the processing of ${var:offset;len} in multi-byte
	  locales when len is larger than the number of characters has been
	  fixed.
10-07-23  Many coding changes have been made to eliminate most of the uses
	  of global variables in the shell code.
10-07-22  Fixed a bug in which discipline functions were not being invoked
	  when it was invoked as ref.discipline where ref was a name reference
	  to an array instance.
10-07-22  Fixed a bug in which discipline functions were not being invoked it
	  was invoked on a two dimensional array, i.e., arr[5][9].discipline.
10-07-19  Fixed a buffering problem which occurred when running a script with
	  ssh and the parent ssh process is killed.
10-07-14  Modified the parser to treat ((...)) inside [[ ... ]] as ( (...) ) so
	  that it is a nested (...).
10-07-09  A bug in the handling of process substitution inside command
	  substitution as part of a pipeline has been fixed.
10-07-07  A bug in the output for compound variables containing
	  multidimensional arrays has been fixed.
10-07-06  ksh now recovers from changes made by bash to the history file without
	  losing history commands.
10-06-25  A bug in which a large here document containing command substitutions
	  of a dynamically loaded function that contained a here document
	  could get truncated has been fixed.
10-06-24  If after executing a script found in FPATH, if a function, builtin,
	  or type name corresponding to that script is not defined, the shell
	  now outputs an error message and returns value 126.
10-06-23  Floating point functions that happened to return integer values
	  were being treated as if the function returned integers so that
	  integer division could be used instead of floating point division.
10-06-22  Fixed a bug in earlier ksh93u in which an arithmetic assignment to a
	  variable in the global scope would instead create a local variable if
	  the variable had an attribute but did not have a value.
10-06-18  Modified trap handling so that if the same signal is received when
	  executing the handler, it is deferred until the handler completes.
10-06-16  Fixed a bug in which ulimit -v was setting the CPU limit
	  on Linux.
10-06-14 +The command 'typeset -T' now generates the list of type definitions
	  in a format that can be used as input to the shell.
10-06-09  Put in patch from Solaris for output quoting with %q.
10-06-09 +Made changes to the NAMESPACE compile option so that it now seems
	  to work.  With this option, namespace <name> { command;} will
	  run command in the namespace .name so that all variables and
	  functions created by command are accessible outside the name
	  space via .name.var and .name.fun.  Variables and functions that
	  are not in the namespace are not modified when running command.
10-06-07  Change most internal interfaces to take Sh_t* argument.
10-06-03 +Types can be loaded on first reference by putting definitions in
	  PFPATH.
10-06-03 +The shell is now able to parse commands which use type statements
	  before the typeset -T command to define the type executes.
10-06-03  A bug in the quoting for name reference declarations which did
	  not properly handle [ and ] in subscripts for associative arrays.
10-06-02  A bug in which a discipline function defined by a type instance to
	  override the default was not being registered has been fixed.
10-06-02  A bug in which read -C of an associative array of compound variables
	  was not working has been fixed.
10-06-02  A bug in which the error message for an unset parameter with set -u
	  did not contain the name of the variable has been fixed.
10-06-01  A bug in typeset -m for moving an indexed array instance to a variable
	  has been fixed.
10-06-01  A bug in which caused memory to be freed twice when unset was called
	  for an indexed array that had get or set disciplines has been fixed.
10-06-01  A bug in which the %b format of printf was not preserving NUL bytes
	  with \0 has been fixed.
10-06-01  A bug in the handling of name references to array variables in
	  arithmetic expressions has been fixed.
10-05-28  Fixed bugs in changing attributes for two dimensional arrays.
10-05-28  Eliminated a few unreferenced variables and a reference to
	  uninitialized memory.
10-05-27  Rewrote the subshell code to avoid using pipes an many cases.
10-05-24  Fixed a bug which cause an exception when both -l and -s were
	  specified with typeset -i.
10-05-21  Inputting of three dimensional indexed arrays with ( ( (...)...)...)
          was not working and has been fixed.
10-05-21  A bug in which adding the attributes -Ai to a variable via a name
	  reference could cause the value to display incorrectly has been fixed.
10-05-21  A bug in which using $var inside ((...)) did not work when var was
	  a hex float variable.
10-05-20 +The compile option SHOPT_EDPREDICT has been added.  When this option
	  is on, as you type a line beginning with a # the following characters
	  are treated as a shell pattern and cause matching lines from the
	  history file to be displayed as a numbered list as you type.
	  You can scroll up and down this list or you can use <ESC>nTAB
	  to make this the current line (n defaults to 1 of omitted) or
	  <ESC>n<cr> to execute.
10-05-20  A bug which caused an exception when multiple levels of composite
	  functions in arithmetic expressions has been fixed.
10-05-19  <<< with an empty string no longer gives an error.
10-05-19  A bug in arithmetic evaluation when a name reference to an array
	  instance was used has been fixed.
10-05-14  A bug in which the shell treats a valid indexed array assignment,
	  typeset -a x=(foo (x=3;y=4) bar) as a syntax error has been fixed.
10-05-13  A bug in creating name references to associative array variable
	  after a lookup of one of its elements has been fixed.
10-05-12  Two bugs in the handling of function static type variables in
	  subshells have been fixed.  One could cause an exception and the
	  other would leave side effects in the parent shell.
10-05-10  A bug in which static variables in functions were not being saved and
	  restored properly when running subshells has been fixed.
10-05-05  A bug in which print -v did not work correctly when an operand was an
	  indexed array element referring to a compound variable has been fixed.
10-05-05  A change to improve performance by special casing empty string
	  assignments to avoid repeated malloc() and free().
10-05-05  A bug in which creating a name reference to a non-existent associative
	  array element would create the array element has been fixed.
10-05-04  A bug in which name references to static variables in the static
	  scope were not found has been fixed.
10-04-30  Do not use socketpair() on systems that implement ioctl(I_PEEK)
	  on pipes.
10-04-29 +When the current job pool is set, coprocess are run in a job pool.
10-04-28  A type defined with a member foo that is an associative array without
	  elements followed by an expansion ${bar.foo[a]} and an assignment
	  bar.foo[a]=b, no longer indicates that ${#bar.foo[@]} has 0 members.
10-04-27  Another bug in which a nested command substitution could hang if it
	  generated too much data has been fixed.
10-04-26  A type defined with a member that is an indexed array without elements
	  would behave as if the 0th element of each instance was defined after
	  a non-zero element was specified and this has been fixed.
10-04-26  A bug in which types defined in a subshell were not undefined when
	  the subshell completed has been fixed.
10-04-23  For file completion in command line editing, file names starting
	  with # are now escaped so that they are not treated as comments.
10-04-23  A bug in which ${t.var:=value}, where t is an instance of a type
	  variable, could assign value to the type variable rather than to
	  the type instance has been fixed.
10-04-23 +Added &| which can be used in place of | to have portions of a
	  pipeline executed in the pool.
10-04-22 +The .sh.pool variable was added for use with job pools.
10-04-22  A bug in which a nested command substitution could hang if it
	  generated too much data has been fixed.
10-04-20  A bug which corrupted one byte of memory when read was called with
	  reads that did not use a delimiter has been fixed.
10-04-19  The display of a compound variable with an embedded array with
	  attributes was sometimes not working correctly and has been fixed.
10-04-16  A bug in which attributes were not be propagated to elements in
	  an associative array has been fixed.
10-04-15  A bug which caused scripts containing user defined math functions to
	  fail to compile with shcomp has been fixed.
10-04-15 +Job pools have been added with the SHOPT_COSHELL compilation option.
	  A job pool allows a collection of background jobs to run either locally
	  or remotely and to be managed as a unit.  The command '& name ...'
	  creates or uses a named job pool for subsequent background jobs.
	  kill, wait, and jobs allow the pool name as operands.
10-04-14  A bug in which a coprocess connection could terminate prematurely
	  when running a nested subshell has been fixed.
10-04-12 +Enumeration constants can be used in arithmetic expressions with the
	  ==, != and = operators when the left hand side is an enum variable
	  and the right hand side is an enumeration constant.
10-04-07  A bug in which setting the trap on CHLD to ignore could cause
	  an incorrect exit status has been fixed.
10-04-06  A bug in which LINENO was not incremented for a here-document when
	  the here-document word was followed by a comment has been fixed.
10-04-06  The optimization that execs the last process of a script rather
	  than creating a new process has been removed when a trap on
	  interrupt has been set.
10-04-06  Unsetting the 'C', 'A' or 'a' typeset attribute now produces an
	  error message rather than generating an exception.
10-04-06  A bug in which .sh.name contained the subscript and .sh.subscript
	  was empty in some cases with discipline functions on array instances
	  has been fixed.
10-04-05  A bug in the edit modes where preceding the interrupt character with
	  the literal next character did not work has been fixed.
10-04-05  A bug in the creation of type instances of arrays which could cause
	  an exception has been fixed.
10-03-30  A bug in the display of a compound variable containing an indexed
	  array of compound variables has been fixed.
10-03-24 +Arithmetic functions can be defined using the shell function syntax,
	  'function .sh.math.name x y z{...}' , where name is the function name
	  invoked within ((...)) and x y z are long double arguments passed
	  as name references.  y and z are used for functions with two and
	  three arguments respectively.  The value of the function is the value
	  of the long double .sh.value variable when the function returns.
10-03-24  A bug in which integer division was mistakenly used when the
	  numerator was a binary operator with the first operand floating
	  point and the second integer, e.g. (.1**3)/3, has been fixed.
10-03-24  The >; file operator was modified so that the temporary file is
	  created in the same physical directory as file.
10-03-23  A warning message was added to sh -n when $var was used inside
	  ((...)) instead of var.
10-03-19  fmin was added to the list of math function on the man page.
10-03-19  Fixed the return value for unalias when the alias did not
	  exist.
10-03-19  A bug in which the SHLVL variable exported the value it had on
	  input rather than the incremented value has been fixed.
10-03-19  A bug which causes whence -q to go into an infinite loop has been
	  fixed.
10-03-19  Removed space between Stopped message and (SIGTTIN) and (SIGTTOUT).
10-03-17  Modified profile shell execution so that when builtins that
	  correspond to executable have extended attributes, they are
	  executed by pfksh instead of being treated as built-ins.
10-03-16  A bug in whence -a which produced duplicate lines of output has
	  been fixed.
10-03-16  A bug in the handling of process groups in monitor mode for
	  command substitutions has been fixed.
10-03-15  Fixed a bug in which read -u[fd] could cause the shell to core
	  dump when fd was greater than open_max.
10-03-15 +Modified the shell I/O so that the shell will not fail if the
	  ulimit for open_max is increased as part of the script.
10-03-12  A bug in which a here-document containing command substitutions
	  that contained here-documents did not process correctly has been
	  fixed.
10-03-12  A bug in which the terminal is not restored to canonical mode
	  after read times out when in a multibyte locale with no edit mode
	  enabled has been fixed.

10-03-05  --- Release ksh93t+  ---
10-03-05  A variable unset memory leak has been fixed and tests/leaks.sh
	  has been added to verify the fix.
10-03-04  Documentation, comment, and diagnostic spelling typos corrected.
10-02-14  Fix sh_getenv() initialization to cooperate with the 3d fs.
10-02-12  A bug in which the get discipline function was not invoked for
	  associative array subscripts for unset array elements has been fixed.
10-02-12  A bug which could occur if the last line of a script was an eval
	  that executed multiple commands has been fixed.
10-02-02  A buffer overflow in read and another in binary type base64
	  encoding were fixed.
10-01-20  A bug in the evaluation of arithmetic expression in which the
	  subscript was evaluated twice for $((foo[x++]++)) has been fixed.
10-01-19  A workaround for a double-free of a trap in both a subshell and its
	  parent has been added.
10-01-18  A bug in type handling of typeset -H has been fixed.
10-01-15  The "adding empty subscript" warning now only emitted with -x set.
10-01-01  A bug in the parser in which '$((case i in i):;esac);:))' was not
	  parsed correctly was fixed.
10-01-01  A bug in the parser in which '$(( 2 , 3.6 ))' dumped core for locales
	  with radix char , and thousands separator . has been fixed.
09-12-28  A bug in the handling of SIGCLD on systems that generated SIGCLD
	  while blocked waiting for process to complete has been fixed.
09-12-24  AST setlocale() reworked to differentiate env var changes from user
	  override.
09-12-18  A bug with the SHOPT_BGX option set which disabled traps for signals
	  < SIGCHLD when a trap for a signal > SIGCHLD was set has been fixed.
09-12-18  A bug where [[ -v var ]] was incorrect for some variables (including
	  LC_* vars) has been fixed.
09-12-15  A bug that produced a syntax error when a multibyte character
	  straddled a buffer boundary has been fixed.
09-12-11  A bug where the subscript of an unset variable was not evaluated has
	  been fixed.
09-12-09  A bug where shcomp dumped core on certain syntax errors has been fixed.
09-12-07  A bug where a parent shell environment var reset in a subshell removed
	  the value in subsequent children of the parent shell has been fixed.
09-12-04  A bug in which in some cases a trap in a function executed in
	  a subshell could trigger twice has been fixed.
09-12-03  A bug in which SHLVL exported with some attributes could cause
	  the shell to abort at startup has been fixed.
09-12-02  A bug with pipefail in which the shell could hang waiting for the
	  writer to complete before the last reader command has been fixed.
09-11-30  A bug in which a trap could be inherited by the first element of
	  a pipeline when the command had more than 63 arguments that did
	  not contain any macro expansions has been fixed.
09-11-19  When read from a terminal was called from with a while or for loop,
	  and an edit mode was on, a backspace or erase no longer will
	  overwrite the prompt.
09-11-17 +Change .paths parse to handle BUILTIN_LIB=foo BUILTIN_LIB=foo-1.2.
09-11-17  Inside a function, typeset foo.bar will bind foo to global variable
	  foo if local variable foo does not exist, instead of creating a
	  local variable.
09-11-17  "read -n1" from the terminal has been fixed to read exactly one character.
09-11-11  Job control now works for subshell commands, (...).
09-11-11  If set -e is on for an interactive shell errors in special builtins
	  now cause the shell to exit.
09-11-11  A bug in which an interrupt handler processed during the read builtin
	  when IFS did not contain a new line has been fixed.
09-11-09  A bug in which a variable that has been unset in a subshell and then
	  exported from that subshell does not show up in the environment
	  has been fixed.
09-11-02  ``,2'' is now a valid numeric constant for locales with
	  decimal_point=','.
09-11-02  A bug where "return" in .profile did not restore the shell state
	  has been fixed.
09-10-31  A bug that corrupted saved exit status when pids wrapped around has
	  been fixed.
09-10-26  A bug in { LANG LC_ALL LC_category } ordering has been fixed in -last.
09-10-16  A bug where notification to libast that the environment has changed
          has been fixed.
09-10-12  A bug in which a function loaded in a subshell could leave side
	  effects in the parent shell has been fixed.
09-10-12  A bug in converting a printf %d operand to a number when the operand
	  contains multiple subscripts for the same variable has been fixed.
09-10-09  A bug in the handling of the escape character \ in directory prefixes
	  in command completion has been fixed.
09-10-09  $PATH processing has been changed to delay dir stat() and .paths
	  lookup until the directory is needed in the path search.
09-09-28  Call the AST setlocale() intercept on unset too.
09-09-24  A bug in which LANG=foo; LC_ALL=foo; unset LC_ALL; did not revert
	  LC_CTYPE etc. to the LANG value has been fixed.
09-09-17  A bug in which unsetting SVLVL could cause a script invoked by
	  name without #! to core dump has been fixed.
09-09-16  A bug in which a pipeline in a here-document could hang when the
	  pipefail option was on has been fixed.
09-09-09  A bug in the processing of line joining in here documents which
	  occurred when a buffer began with <escape><new-line> has been fixed.
09-09-09 +A leading ; with commands in a brace group or parenthesis group
	  no longer causes an error.  It now is used for the "showme" option.
09-09-09  A bug in which a subshell containing a background process could
	  block until the background process completed has been fixed.
09-09-04  A bug in handling ${var[sub]}, where var is a nameref has been fixed.
09-09-03  A bug which caused an indexed array to have the wrong number of elements
	  when it was converted from a compound variable by adding an another
	  element has been fixed.
09-09-03  Specifying export for a compound variable now generates an error.
09-09-02  $"..." localizations strings are no longer recognized inside `...`.
09-09-01  A bug in the for loop optimizer in the handling of type static
	  variables has been fixed.
09-09-01  An error message is not displayed when * and @ are used as subscripts.
09-09-01  Several bugs in the processing for types that included an associative
	  array of another type has been fixed.
09-09-01  A bug in the tracing of [[ a < b ]] and [[ a > b ]] has been fixed.
09-08-26  The .sh.file variable was not being set for a script that was run
	  by name and didn't start with #! and this has been fixed.
09-08-25  A bug in which a function called to deeply from command substitution
	  did not display an error message has been fixed.
09-08-24 +When processing profiles, ksh93 now violates the POSIX standard and
	  treats &> as a redirection operator similar to bash.
09-08-23  A bug in the handling of the trap on SIGPIPE that could lead to a
	  memory fault has been fixed.
09-08-21  A bug in the handling of the comma operator in arithmetic expressions
	  that could cause a core dump on some systems has been fixed.
09-08-20  A bug in which a compound variable containing an array of a type
	  that doesn't have any elements now expands correctly.
09-08-19  A bug which disabled function tracing inside a function after
	  a call to another function has been fixed.
09-08-19  A bug in which initializing a compound variable instance to another
	  compound variable by name has been fixed.
09-08-18  A bug in which compound variable instances could be lost after
	  an instance that invoked a type method discipline has been fixed.
09-08-18  A bug in which a discipline function for a type applied to an
	  array instance when invoked in a function ignored the subscript
	  has been fixed.
09-08-18  A scoping error with variables in arithmetic expression with
	  type variables when reference with a name reference has been fixed.
09-08-10  Several memory leaks were fixed primarily related to subshells.
09-08-06  A bug in which setting the trap on CHLD to ignore could cause
	  a script to hang has been fixed.
09-07-08  A bug in the processing of name reference assignments when it
	  contained pattern expansions with quoting has been fixed.
09-06-22 +The default width for typeset -X has been changed so that there
	  should be no loss of precision when converting to a string.
09-06-19  A bug in the printing of array elements for binary variables with
	  printf %B has been fixed.
09-06-19  A bug which caused a core dump with trap DEBUG set with an array
	  assignment with no elements has been fixed.
09-06-19  A bug with read with typeset -b -Z<num> has been fixed.
09-06-19  Two bugs related to read -b for array variables has been fixed.
09-06-19  A bug with typeset for compound variables containing arrays of
	  compound variables has been fixed.
09-06-18  A bug in appending a compound variable to an indexed array of
	  compound variables has been fixed.
09-06-18  A bug which occurs when appending a compound variable to an indexed
	  array element has been fixed.
09-06-18  Setting VISUAL to a value other than one ending in vi or emacs will
	  no longer unset the edit mode.
09-06-17  A bug in typeset -m when moving a local compound variable to a
	  global compound variable via a name reference has been fixed.
09-06-17  A bug in appending to nodes of an array of compound variables when
	  addressing them via nameref has been fixed.
09-06-17  A bug in typeset -p var, when var is an array of compound variables
	  in which the output only contained on array element has been fixed.
09-06-17  The prefix expansion ${!y.@} now works when y is a name
	  reference to an element of an array.
09-06-16  Traps on signals that are ignored when the shell is invoked
	  no longer display.  Previously they were ignored as required but
	  would be listed with trap -p.
09-06-12  A bug in vi edit mode in which hitting the up arrow key at the
	  end of a line longer than 40 characters which caused a core dump
	  has been fixed.
09-06-11  A bug in which "eval non-builtin &" would create two processes,
	  one for the & and another for non-builtin has been fixed.
09-06-08  When var is an identifier and is unset, ${var} no longer tries to
	  run command substitution on the command var.
09-06-08 +Process substitution arguments of the form <(command) can now be
	  used following the < redirection operator to redirect from command.
09-05-13  A bug in which redirections of the form 2>&1 1>&5 inside command
	  substitution could cause the command substitution to hang has been
	  fixed.
09-05-12  To conform with POSIX, the -u option only checks for unset variables
	  and subscript elements rather than checking for all parameters.
09-05-12  A bug which could cause a core dump when a variable whose name
	  begins with a . was referenced as part of a name reference inside
	  a function has been fixed.
09-05-01  A bug that caused a core dump when SIGWINCH was received and
	  both vi and emacs mode were off has been fixed.
09-04-22 +Default alias compound='typeset -C' added.
09-04-15  A bug that caused ${...;} to hang for large files has been fixed.
09-04-08  A change was made in the -n option which printed out an incorrect
	  warning with <>.
09-04-07  The emacs edit command M-_ and M_. and the vi command _ was fixed
	  to handle the case there there is no history file.
09-04-05  A bug in handling new-lines with read -n has been fixed.
09-04-05  The ENV variable defaults to the file named by $HOME/.kshrc rather
	  then to the string $HOME/.kshrc.
09-03-31  A bug in which a nested command substitution with redirections could
	  leave a file descriptor open has been fixed.
09-03-24 +ksh now only uses the value of the _ variable on startup if it can
	  verify that it was set by the invoking process rather than being
	  inherited by some other ancestor.
09-03-24 +When ksh is invoked without -p and ruid!=euid, and the shell is
	  compiled without SHOPT_P_UID or ruid<SHOPT_P_UID, the shell now
	  enables the -p option.  The previous version instead set the
	  euid to the ruid as it does for set +p.
09-03-24 +When SHOPT_P_UID is defined at compile time and the shell is started
	  without -p and ruid!=euid and ruid>=SHOPT_P_UID then euid is set
	  to ruid. A bug that did the wrong test (ruid<SHOPT_P_UID) was fixed.
09-03-17 +The sleep(1) builtin now accept and ISO 8601 PnYnMnDTnHnMnS
	  duration or date(1) compatible date/time operand.
09-03-10  If a variable that was left or right justified or zero-filled was
	  changed with a typeset statement that was left or right justified
	  or zero-filled, then the original justification no longer affects
	  the result.
09-03-10  A bug in the handling of traps when the last command in a script
	  is a subshell grouping command has been fixed.
09-03-03  A bug in which an expansion of the form ${!prefix@} could generate
	  an exception after the return from a function has been fixed.
09-02-02  A bug in restricted mode in which the value of ENV could be
	  changed from within a function has been fixed.
09-02-02  A bug in which an erroneous message indicating that a process
	  terminated with a coredump has been fixed.
09-02-02  The exit status when exit was called without an argument from
	  a signal handler was incorrect and has been fixed.
09-02-02  A bug in which a function autoloaded in a subshell could cause
	  a core dump when the subshell completed has been fixed.
09-02-02  A bug in which 2>&1 inside a command substitution wasn't working
	  correctly has been fixed.
09-02-02  A bug in the call stack of arithmetic function with 2 args
	  returning int has been fixed.
09-01-30  A bug in which 'eval print \$0' inside a function was giving the
	  wrong value for $0 has been fixed.
09-01-28  A bug in which a command substitution could return an exit status
	  of 127 when the pipefail option is enabled has been fixed.
09-01-26  ksh93 now generates an error message if you attempt to create
	  a global name reference to a local variable.
09-01-26 +The [[ -v var ]] operator was modified to test for array elements.
09-01-23 +The redirection operator <>; was added.  It is similar to <>
	  except that if the command it is applied to succeeds, the file
	  is truncated to the offset at the command completion.
09-01-23  The default file descriptor for <> was changed to 1.
09-01-20  A bug in which the exit status specified in an exit trap was
	  not used when a process terminated with a signal has been fixed.
09-01-19  A bug in which a signal whose default action is to terminate
	  a process could be ignored when the process is running a subshell
	  has been fixed.
09-01-19  A bug in which sending SIGWINCH to a process that reads from a pipe
	  could cause a memory fault has been fixed.
09-01-16 +The -R unary operator was added to [[ ... ]] and test to check whether
	  a variable is a name reference.
09-01-16 +The -v unary operator was added to [[ ... ]] and test to check whether
	  a variable is set.
09-01-14  The unset built-in was modified to return 0 exit status when
	  unsetting a variable that was unset to conform with the POSIX
	  standard.
09-01-14  The unset built-in was modified to continue to unset variables
	  after encountering a variable that it could not unset to
	  conform to the POSIX standard.
09-01-14  The parameter expansion ${x+value} no longer expands the value of
	  the variable x when determining whether x is set or not.
09-01-13  A bug in which background jobs and pipelines that were not waited
	  for could, in rare instances, cause the shell to go into an infinite
	  loop or fail has been fixed.
09-01-06  A bug in indexed arrays of compound variables in which referencing
	  non-existent sub-variable in an arithmetic expression could cause
	  the sub-variable to be created has been fixed.
09-01-05  A bug in which the \ character did not escape extended regular
	  expression pattern characters has been fixed.
08-12-24  A bug in which killing the last element of a pipe did not cause
	  a write to the pipe to generate a SIGPIPE has been fixed.
08-12-19  A bug which could cause command substitution to hang when the
	  last element of a pipeline in a command substitution was a built-in
	  and the output was more that PIPE_BUFF.
08-12-18  A bug which occurs when a here documented marker embedded in a
	  command substitution occurs on a buffer boundary has been fixed.
08-12-17  A bug in the output of typeset -p for variables that had attributes
	  but did not have a value has been fixed.
08-12-16  A bug in which a name reference to a name reference variable that
	  references an array element has been fixed.
08-12-16  A bug in which a variable given both the -A and -C attribute along
	  with an initial assignment didn't work correctly has been fixed.
08-12-10  The [[ -t fd ]] test was fixed to handle fd>9.
08-12-10  A bug where function stack misalignment could cause a bus error
	  has been fixed.
08-12-09  Command completion was changed to use \ to quote special characters
	  instead of quoting the argument in single quotes.
08-12-07  A bug in typeset -m which occurred when the target node was an
	  associative array element has been fixed.
08-12-07  A timing bug on some systems (for example Darwin), that could
	  cause the last process of a pipeline entered interactively to fail
	  with an "Exec format error" has been fixed.
08-12-04 +SHOPT_BGX enables background job extensions. Noted by "J" in
	  the version string when enabled. (1) JOBMAX=n limits the number
	  of concurrent & jobs to n; the n+1 & job will block until a
	  running background job completes. (2) SIGCHLD traps are queued
	  so that each completing background job gets its own trap; $! is
	  set to the job pid and $? is set to the job exit status at the
	  beginning of the trap. (3) sleep -s added to sleep until the time
	  expires or until a signal is delivered.
08-12-04  The sign of floating point zero is preserved across arithmetic
	  function calls.
08-12-04  A bug that caused print(1) to produce garbled stdout/stderr
	  output has been fixed.
08-12-04  A bug in which printf "%d\n" "'<euro>'" did not output the
          numerical value of the EURO symbol, 8354, has been fixed.
08-11-24 + /dev/fd* and /dev/std* redirections are first attempted with
	  open() to preserve seek semantics; failing that the corresponding
	  file descriptors are dup()'d.
08-11-20  A bug which could cause a core dump if a function compiled with
	  shcomp was found has been fixed.
08-11-20  A bug in which jobs were not cleared from the jobs table for
	  interactive shells when the pipefail option is on has been fixed.
08-11-11  A bug in which a field that was unset in a type definition and later
	  set for an instance could appear twice when displaying the variable
	  has been fixed.
08-11-11  A bug in which running a simple command & inside a function would
	  not return the correct process id has been fixed.
08-11-10  A bug in which the exit status of a command could be lost if the pid
	  was that of the most recent command substitution that had completed
	  has been fixed.
08-11-10  The maximum depth for subshells has been increased from 256 to 65536.
08-11-06  A bug which could cause a core dump when the _ reference variable was
          used as an embedded type with a compound assignment has been fixed.

08-10-31  --- Release ksh93t  ---
08-10-31  Variable scoping/initialization bugs that could dump core were fixed.
08-10-24  The lexer now accepts all RE characters for patterns prefixed
	  with a ksh ~(...) option expression.
08-10-24 +For ${var/pat/sub} \0 in sub expands to the text matched by pat.
08-10-18  A bug in array scoping that could dump core has been fixed.
08-10-10  read -n and -N fixed to count characters in multibyte locales.
08-10-10  A bug that mishandled _.array[] type references has been fixed.
08-10-09 +${.sh.version} now contains a concatenation of the following (after
	  'Version') denoting compile time features:
		A	SHOPT_AUDIT
		B	SHOPT_BASH
		L	SHOPT_ACCT
		M	SHOPT_MULTIBYTE
08-10-09  A bug that caused subshell command substitution with redirection
	  to hang has been fixed.
08-10-08  Output errors, other than to stderr, now result in a diagnostic.
08-10-08  ksh93 now supports types that contain arrays of other types as
	  members.  Earlier versions core dumped in this case.
08-10-05  A bug which caused the shell to emit a syntax error for an arithmetic
	  statement of the form (( var.name[sub] = value)) has been fixed.
08-10-01  A bug that caused subshell command substitution to hang has
	  been fixed.
08-09-29  When the -p export option of typeset is used with other options,
	  only those variables matching the specified options are displayed.
08-09-29  When the shell reads the environment and finds variables that are
	  not valid shell assignments, it now passes these on to subsequent
	  commands rather than deleting them.
08-09-29  A bug in the display of compound variables containing an indexed
	  array of compound variables has been fixed.
08-09-29  A bug in the display of compound variables containing an associative
	  array with a subscript containing a . in the name has been fixed.
08-09-26  A core dump in the subshell environment restore has been fixed.
08-09-24  $(...) has been fixed to properly set the exit status in $?.
08-09-23  $(<...) with IFS=$'\n\n' has been fixed to retain all but the last
	  of multiple trailing newlines.
08-09-23  The -p option to typeset when used with other attributes, restricts
	  the output to variables with the specified attributes.
08-09-22  A bug that sometimes lost the exit status of a job has been fixed.
08-09-21  A bug that retained trailing command substitution newlines in
	  cases where the command caused the shell to fork has been fixed.
08-09-19  type, whence -v, and command -v were fixed to comply with POSIX
	  by writing 'not found' diagnostics to the standard error.
08-09-18  test and [ ... ] were fixed to comply with POSIX in the case
	  of test '(' binop ')' where binop is a valid binary test operator.
08-09-16 +If a method discipline named create is specified when defining a
	  type, this function will be called when an instance is created.
08-09-15 +The variable _ is now set as a reference to the compound variable
	  when defining a compound variable or a type.
08-09-10  The shell now prints an error message when the type name specified
	  for an indexed array subscript is not an enumeration type.
08-09-10  A bug in which a subshell that spawned a background process could
	  lose output that was produced after the foreground completed
	  has been fixed.
08-09-10  A timing bug on some systems that could cause coprocesses started by a
	  subshell to not clean up and prevent other coprocesses has been fixed.
08-09-09  The typeset -m option is now able to rename array elements from
	  the same array.
08-09-09  The exit status of 2 from the DEBUG trap causes the next command
	  to be skipped.  An exit value of 255 from a DEBUG trap called from
	  a function causes the function to return.
08-09-08  A bug in which a coprocess created in a subshell that did not
	  complete when the subshell terminated could prevent a coprocess
	  from being created in the parent shell has been fixed.
08-09-05  An assignment of the form name1=name2 where name1 and name2
	  are both compound variables causes name1 to get a copy of name2.
	  name1+=name2 causes name2 sub-variables to be appended to name1.
08-09-05  A bug in which unsetting a compound variable did not unset all
	  the sub-variables has been fixed.
08-09-01  A bug in the subshell cleanup code that could cause SIGSEGV has
	  been fixed.
06-08-26 +The SHLVL variable which is an environment variable used by bash
          and zsh that gets incremented when the shell starts.
08-08-25 +For an indexed array, a negative subscript now refers to offsets
	  from the end so that -1 refers to the last element.
08-08-24  An alignment error for shorts on 64 bit architectures has been fixed.
08-08-22  If oldvar is a compound variable, typeset -C newvar=oldvar creates
	  newvar as a copy of oldvar.
08-08-19 +The ALRM signal no longer cause the sleep builtin to terminate.
08-08-13  When used in an arithmetic expression, the .sh.version variable
	  now produces a number that will be increasing for each release.
08-08-11  A bug in which type instantiation with a compound assignment in
	  a dot script in which the type is defined has been fixed.
08-08-07 +The -m option has been added to typeset to move or rename a
	  variable.  Not documented yet.
08-08-06  A bug in read when used in a loop when a prompt was specified
	  when reading from a terminal has been fixed.
08-08-01  A bug with the pipefail option in which a nested pipeline could
	  cause an asynchronous command to block has been fixed.
08-08-01  A for loop optimizer bug that treats .sh.lineno as an invariant
	  has been fixed.
08-07-30  A bug in which expanding compound variable that had a get discipline
	  from with a here document could cause a syntax error has been fixed.
08-07-18  A bug in which a nameref caused a local variable to be created
	  rather than binding to an existing variable in the global scope
	  has been fixed.
08-07-17  A bug which occurred when a nameref was created from within a
	  function that was  part of a pipeline has been fixed.
08-07-14 +The compile option SHOPT_STATS was added. With this option the
	  compound variable .sh.stats keeps usage statistics that could help
	  with performance tuning.
08-07-10 +The output of set now always uses a single line for each variable.
	  For array variables, the complete set of values is now displayed.
08-07-09 +The typeset -C option can be used with arrays to indicate that
	  each element should default to a compound variable.
08-07-08 +The %B format now outputs compound variables and arrays.  The
	  alternate flag # can be used to cause output into a single line.
08-07-03  When the window change signal, WINCH, is received, the current
	  edit line is redrawn in place.
08-07-01  A bug in the handling of shared variables when inside an embedded
	  type has been fixed.
08-06-29  A bug in multiline edit mode which occurred when the prompt length
	  was three characters or less has been fixed.
08-06-23  A bug in which the SIGCLD was not be triggered when background
	  jobs completed has been fixed.
08-06-23  _KSH_VERSION added as a name reference to .sh.version.
08-06-20  type now outputs 'special builtin' for special builtins.
08-06-19  A couple of bugs in multidimensional arrays have been fixed.
08-06-19  A bug in which a syntax error in a dot script could generate
	  a syntax error in the next subsequent command has been fixed.
08-06-17  Reduced the maximum function call depth to 2048 to avoid exceptions
	  on some architectures.
08-06-16  A bug in which printf "%B" could generate an exception when the
	  specified variable was not set has been fixed.
08-06-16 +When typeset -p is followed by variable names, it now displays
	  the attributes names and values for the specific names.
08-06-14  A bug that could affect the drawing of the screen from multiline
	  emacs or gmacs mode when walking up the history file has been fixed.
08-06-13  A bug in which a compound variable defined in a subshell could
	  have side effects into the parent shell has been fixed.
08-06-13  A number of bugs related to using .sh.level to set the stack from
	  for DEBUG traps have been fixed.
08-06-13 +The .sh.lineno variable has been added.  When .sh.level is changed
	  inside a DEBUG trap, the .sh.lineno contains the calling line number
	  for the specified stack frame.
08-06-13  The .sh.level variable has been documented and now works.
08-06-11 +The -C option has been added to read for reading compound command
	  definitions from a file.
08-06-11 +The . command is now permitted inside a compound command definition.
	  The dot script can contain declaration commands and dot commands.
08-06-09 +Add -C option to typeset so that typeset -C foo, is equivalent
	  to foo=().
08-06-09  Added -n warning message for typeset option orderings that are valid
	  with ksh88 but not valid with ksh93, for example Lx5.
08-06-09  A bug in which the return value for an assignment command containing
	  a command substitution with that failed was zero when the assignment
	  contained redirections has been fixed.
08-06-09  A bug in the quoting of $ inside a ERE pattern ~(E)(pattern)
	  has been fixed.
08-06-06  A bug when processing `` command substitution with the character
	  sequence \$' has been fixed.
08-06-02 +When defining a type, the typeset -r attribute causes this field
	  to be required to be specified for each instance of the type and
	  does not allow a default value.
08-06-02  Several bugs in which compound variables were modified by
	  subshells have been fixed.
08-05-22 +The ceil function has been added to the math functions.
08-05-21  A bug in which a name reference defined in a function and passed
	  as an argument to another function could cause an incorrect binding.
08-05-21  A bug in freeing compound variables that are local to functions
	  has been fixed.
08-05-19 +The array expansions ${array[sub1..sub2]} and ${!array[sub1..sub2]}
	  to expand to the value (or subscripts) for array between sub1 and
	  sub2 inclusive.  For associative arrays, the range is based on
	  location in the POSIX locale.  The .. must be explicit and cannot
	  result from an expansion.
08-05-15  The trap on SIGCLD is no longer triggered by the completion of
	  the foreground job as with ksh88.
08-05-14  A bug in the implementation of the editing feature added on
	  07-09-19 in emacs mode has been fixed.
08-05-12  A bug in processing the test built-in with parenthesis has been
	  fixed.
08-05-12  The unset built-in now returns non-zero when deleting an array
	  subscript that is not set.
08-05-08 +Changing the value of HISTFILE or HISTSIZE will cause the old
	  history file to be close and reopened with the new name or size.
08-05-08  When FPATH is changed functions that were found via a path search
	  will be searched for again.
08-05-08  A parser bug in which reserved words and labels were recognized
	  inside compound indexed array assignment after a new-line has
	  been fixed.
08-05-07  A bug in getopts when handling numerical option arguments has
	  been fixed.
08-05-07 +The typeset -S option was added for variables outside type
	  definitions to provide a storage class similar to C static
	  inside a function defined with function name.  When outside
	  type definitions and outside a function, the -S option cause
	  the specified variable so be unset before the assignment and
	  before the remaining attributes are supplied.
08-05-07  A bug that affected the cursor movement in multiline mode when
	  a character was deleted from near the beginning of the any
	  line other than the first.
08-05-01  In multiline edit mode, the refresh operation will now clear
	  the remaining portion of the last line.
08-05-01  A bug in computing prompt widths for the edit modes for prompts
	  with multibyte characters has been fixed.
08-05-01  A bug in the multiline edit mode which could cause the current
	  line to be displayed incorrectly when moving backwards from third
	  or higher line to the previous line has been fixed.
08-05-01  A bug in which options set in functions declared with the function
	  name syntax were carried across into functions invoked by these
	  functions has been fixed.
08-04-30  A bug which could cause a coprocess to hang when the read end
	  is a builtin command has been fixed.
08-04-30 +The emacs and vi editors have been modified to handle window
	  change commands as soon as they happen rather than waiting for
	  the next command.
08-04-28  A bug in which ${!x} did not expand to x when x was unset has been
	  fixed.
08-04-27  A bug in which the assignment x=(typeset -a foo=([0]=abc)) created
	  x.foo as an associative array has been fixed.
08-04-25  A bug in which $# did not report correctly when there were more
	  than 32K positional parameters has been fixed.
08-04-04  Choose the name _ as the sub-variable that holds type or instance
	  specific data used by discipline functions.
08-03-27  A bug in which the terminal group was not given back to the parent
	  shell when the last part of a pipeline was handled by the parent shell
	  and the other parts of the pipeline complete has been fixed.
	  The symptom was that the pipeline became uninterruptible.
08-03-25  A bug in restricted mode introduced in ksh93s that caused scripts
	  that did not use #! to executed in restricted mode has been fixed.
08-03-25  A bug in which the pipefail option did not work for a pipeline
	  within a pipeline has been fixed.
08-03-24  A bug in which OPTIND was not set correctly in subshells has
	  been fixed.
08-03-24  A bug which could cause a memory exception when a compound variable
	  containing an indexed array with only element 0 defined was expanded.
08-03-20  A bug in which ${!var[sub].*} was treated as an error has been fixed.
08-03-20  Associative array assignments of the form ([name]=value ...)
	  now allow ; as well as space tab and new line to separate elements.
08-03-18  A buffering problem in which standard error was sometimes
	  not flushed before sleep has been fixed.
08-03-17  A bug in which a signal sent to $$ while in a subshell would be
	  sent to the subshell rather than the parent has been fixed.
08-03-17 + A --default option added to set(1) to handle set +o POSIX semantics.
	  set --state added as a long name alias for set +o.
08-03-14  A bug in which using monitor mode from within a script could
	  cause the terminal group to change has been fixed.
08-03-10  The new ${...} command substitution will treat the trailing }
	  as a reserved word even if it is not at the beginning of a command,
	  for example, ${ date }.
08-03-10  If the name of the ENV begins with /./ or ././ then the
	  /etc/ksh.kshrc file will not be executed on systems that support
	  this interactive initialization file.
08-03-07  A bug in which ksh -i did not run the ENV file has been fixed.
08-03-07  A bug in which ulimit did not always produce the same output as
	  ulimit -fS has been fixed.
08-03-04  A bug in multiline mode in emacs and vi mode which could cause the
	  cursor to be on the wrong line when interrupt was hit has been fixed.
08-03-03  The change made in ksh93s+ on 07-06-18 in which braces became
	  optional for ${a[i]} inside  [[ ... ]] was restored in the case
	  where the argument can be a pattern.
08-03-03  A bug in which creating a name reference to an associative array
	  instance would fail when the subscript contained characters [ or
	  ] has been fixed.
08-02-29 +The redirection operator >; has been added which for non-special
	  files, generates the output in a temporary file and writes the
	  specified file only of the command has completed successfully.
08-02-15  A bug in ${var/pattern/string} for patterns of the form ?(*) and +(*)
	  has been fixed.
08-02-07  A bug in which test \( ! -e \) produced an error has been fixed.
08-02-14 +The typeset -a option can now optionally be followed by the name
	  of an enumeration type which allows subscripts to be enumerations.
08-02-14 +The enum builtin which creates enumeration types has been added.
08-02-12  The backoff logic when there are no more processes has been fixed.
08-02-07  The -X option has been added to typeset.  The -X option creates
	  a double precision number that gets displayed using the C99 %a
	  format.  It can be used along with -l for long double.
08-01-31  The -T option to typeset has been added for creating typed
	  variables.  Also the -h and -S options have been added to
	  typeset that are only applicable when defining a type.
08-01-31  The prefix expansion operator @ has been added.  ${@name}
	  expands to the type of name or yields the attributes.
07-11-15  A bug in the macro expander for multibyte characters in which
	  part of the character contains a file pattern byte has been fixed.
07-10-03  A bug in which : was not allowed as part of an alias name has been
	  fixed.
07-09-26  A bug in which appending a compound variable to a compound variable
	  or to an indexed array didn't work has been fixed.
07-09-19  In both emacs and vi edit mode, the escape sequence \E[A (usually
	  cursor up, when the cursor is at the end of the line will fetch
	  the most recent line starting with the current line.
07-09-18  The value of ${!var} was correct when var was a reference to an
	  array instance.
07-09-18  The value of ${!var[sub]} was not expanding to var[sub] and this
	  was fixed.  It also fixed ${name} where name is a name reference
	  to var[sub].
07-09-18 +It is now legal to create a name reference without an initialization.
	  It will be bound to a variable on the first assignment.
07-08-30 +A discipline function can be invoked as ${x.foo} and is equivalent
	  to ${ x.foo;} and can be invoked as x.foo inside ((...)).
07-07-09  A bug in which typeset -a did not list indexed arrays has been
	  fixed.
07-07-03 +The command substitution ${ command;} has been added.  It behaves
	  like $(command) except that command is executed in the current
	  shell environment.  The ${ must be followed by a blank or an
	  operator.

08-04-17  --- Release ksh93s+  ---
08-04-17  A bug in which umask was not being restored correctly after a
          subshell has been fixed.
08-04-15  A bug in which sending a STOP signal to a job control shell started
	  from within a shell function caused cause the invoking shell to
	  terminate has been fixed.
08-04-11  A bug which caused $(exec > /dev/null) to go into an infinite loop
	  has been fixed.
08-03-27  A bug in which typeset -LZ was being treated as -RZ has been fixed.
08-03-06  A bug with ksh -P on systems that support the profile shell,
          in which it would exit after running a non-builtin has been fixed.
08-01-31  A bug in which command substitution inside ((...)) could cause
	  syntax errors or lead to core dumps has been fixed.
08-01-17  A bug in which discipline functions could be deleted when invoked
	  from a subshell has been fixed.
08-01-17  A bug in which a command substitution consisting only of
	  assignments was treated as a noop has been fixed.
08-01-17  A bug in which discipline functions invoked from within a
	  compound assignment could fail has been fixed.
08-01-16  Incomplete arithmetic assignments, for example ((x += )), now
	  generate an error message.
08-01-16  A bug in which a set discipline defined for a variable before
	  an array assignment could cause a core dump has been fixed.
08-01-03  A bug in on some systems in which exit status 0 is incorrectly
	  returned by a process that catches the SIGCONT signal is stopped
	  and then continued.
07-12-13  A race condition in which a program that has been stopped and then
	  continued could lose its exit status has been fixed.
07-12-12  Code to check for file system out of space write errors for all
	  writes has been added.
07-12-11  A bug in the macro expander for multibyte characters in which
	  part of the character contains a file pattern byte has been fixed.
07-12-06  A bug in the emacs edit mode when multiline was set that output
	  a backspace before the newline to the screen has been fixed.
07-12-04  A bug in which using <n>TAB after a variable name listing expansion
	  in the edit modes would cause the $ to disappear has been fixed.
07-11-28  A bug in which setting IFS to readonly could cause a subsequent
	  command substitution to fail has been fixed.
07-11-27  A work around for a gcc 4.* C99 "feature" that could cause a job
	  control shell to go into an infinite loop by adding the volatile
	  attribute to some auto vars in functions that call setjmp().
07-11-27  A bug in which the shell could read ahead on a pipe causing the
	  standard input to be incorrectly positioned has been fixed.
07-11-27  A bug in which compound variable UTF-8 multibyte values were not
	  expanded or traced properly has been fixed.
07-11-21  A bug where an unbalanced '[' in a command argument was not treated
	  properly has been fixed.
07-11-15  A bug in which compatibility mode (no long option names) getopts(1)
	  incorrectly set the value of OPTARG for flag options has been fixed.
07-11-15  A bug in which "hash -- name" treated "--" as an invalid name operand
	  has been fixed.
07-11-15  typeset now handles "-t -- [-r] [--]" for s5r4 hash(1) compatibility.
07-11-15  A bug in which the umask builtin mishandled symbolic mode operands
	  has been fixed.
07-11-15  Bugs in which shell arithmetic and the printf builtin mishandled the
	  signs of { -NaN -Inf -0.0 } have been fixed.
07-11-15 +The full { SIGRTMIN SIGRTMIN+1 ... SIGRTMAX-1 SIGRTMAX } range
	  of signals, determined at runtime, are now supported.
07-11-15  A bug in which creating an indexed array with only subscript 0 created
	  only a simple variable has been fixed.
07-11-14  A bug in which appending to an indexed array using the form
	  name+=([sub]=value) could cause the array to become an associative
	  array has been fixed.
07-11-14  A bug in which typeset without arguments could coredump if a
	  variable is declared as an indexed array and has no elements has
	  been fixed.
07-11-14  A bug in which creating a local SECONDS variable with typeset in
	  a function could corrupt memory has been fixed.
07-11-14  A bug which could cause a core dump when a script invoked by name
	  from a function used compound variables has been fixed.
07-11-05  A bug in which printf %d "'AB" did not diagnose unconverted characters
	  has been fixed.
07-11-05  printf %g "'A" support added for all floating point formats.
07-11-01  A bug in which typeset -f fun did not display the function definition
          when invoked in a subshell has been fixed.
07-10-29  The sleep builtin was fixed so that all floating point constants
	  are valid operands.
07-10-10  A bug in which the locale was not being restored after
          LANG=value command has been fixed.
07-09-20  A bug in which a nameref to a compound variable that was local
	  to the calling function would not expand correctly when displaying
	  is value has been fixed.
07-09-19  A bug which could cause a core dump if .sh.edchar returned
	  80 characters or more from a keyboard trap has been fixed.
07-09-14  A bug in which could cause a core dump when more than 8 file
	  descriptors were in use has been fixed.
07-09-10  A bug in which creating a name reference to an instance of
	  an array when the array name is itself a reference has been fixed.
07-09-10  The file completion code has been modified so that after an = in
	  any word, each : will be considered a path delimiter.
07-09-06  A bug in which subprocess cleanup could corrupt the malloc() heap
          has been fixed.
07-08-26  A bug in which a name reference to an associative array instance
	  could cause the subscript to be evaluated as an arithmetic expression
	  has been fixed.
07-08-22  A bug in which the value of an array instance was of a compound
	  variable was not expanded correctly has been fixed.
07-08-14  A bug which could cause a core dump when a compound assignment was
	  made to a compound variable element with a typeset -a attribute
	  has been fixed.
07-08-08  A bug in which a trap ignored in a subshell caused it to be
	  ignored by the parent has been fixed.
07-08-07  A bug in which the set command would generate erroneous output
	  for a variable with the -RZ attribute if the variable name had been
	  passed to a function has been fixed.
07-08-02  A bug in which read x[1] could core dump has been fixed.
07-08-02  A second bug in which after read x[sub] into an associative array
	  of an element that hasn't been assigned could lead to a core dump
	  has been fixed.
07-07-31  A bug in which a pipeline that completed correctly could have
	  an exit status of 127 when pipefail was enabled has been fixed.
07-07-09 +The SHOPT_AUDIT compile option has been added for keyboard logging.
07-06-25  In vi insert mode, ksh no longer emits a backspace character
	  before the carriage return when the newline is entered.
07-06-25  A bug in which pipefail would cause a command to return 0
	  when the pipeline was the last command and the failure happened
	  on a component other than the last has been fixed.
07-06-25  A bug in the expansion of ${var/pattern/rep} when pattern or rep
	  contained a left parenthesis in single quotes has been fixed.
07-06-18  The braces for a subscripted variable with ${var[sub]} are now
	  optional when inside [[ ... ]], ((...)) or as a subscript.
07-05-28  A bug in brace expansion in which single and double quotes did
          not treat the comma as a literal character has been fixed.
07-05-24  The -p option of whence now disables -v.
07-05-23  Several bug fixes in compound variables and arrays of arrays
	  have been made.
07-05-15  A bug in which the %B format of printf was affected by the
	  locale has been fixed.
07-05-14  A bug in which \ was not removed in the replacement pattern with
	  ${var/pattern/rep} when it was not followed by \ or a digit has
	  been fixed.
07-05-10  A bug in which ksh -R file core dumped if no script was specified
	  has been fixed.  it not displays an error message.
07-05-07  Added additional Solaris signals to signal table.
07-04-30  A bug in which a pipeline with command substitution inside a
	  function could cause a pipeline that invokes this function to
	  hang when the pipefail option is on has been fixed.
07-04-30 +Added -q to whence.
07-04-18  A small memory leak with each redirection of a non-builtin has
	  been fixed.
07-03-08  A bug in which set +o output command line options has been fixed.
07-03-08  A bug in which an error in read (for example, an invalid variable
	  name), could leave the terminal in raw mode has been fixed.
07-03-06  A bug in which read could core dump when specified with an array
	  variable with a subscript that is an arithmetic expression has
	  been fixed.
07-03-06  Several serious bugs with the restricted shell were reported and
	  fixed.
07-03-02  If a job is stopped, and subsequently restarted with a CONT
	  signal and exits normally, ksh93 was incorrectly exiting with
	  the exit status of the stop signal number.
07-02-26 +M-^L added to emacs mode to clear the screen.
07-02-26  A bug in which setting a variable readonly in a subshell would
	  cause an unset error when the subshell completed has been fixed.
07-02-19 +The format with printf uses the new = flag to center the output.
07-02-19  A bug in which ksh93 did not allow multibyte characters in
	  identifier names has been fixed.
07-02-19  A bug introduced in ksh93 that causes global compound variable
	  definitions inside functions to exit with "no parent" has been fixed.
07-02-19  A bug in which using compound commands in process redirection
	  arguments would give syntax errors <(...) and >(...) has been fixed.
07-01-29  A bug which caused the shell to core dump which can occur when a
	  built-in exits without closing files that it opens has been fixed.
07-01-26  A bug in which ~(E) in patterns containing \ that are not inside ()
	  has been fixed.

06-12-29  --- Release ksh93s  ---
06-12-29  A bug in which the value of IFS could be changed after a command
	  substitution has been fixed.
06-12-22 +/dev/(tcp|udp|sctp)/HOST/SEVRICE now handles IPv6 addresses on
	  systems that provide getaddrinfo(3).
06-12-19 +A -v option was added to read.  With this option the value of
	  the first variable name argument will become the default value
	  when read from a terminal device.
06-11-20  A bug in which "${foo[@]:1}}" expands a null argument (instead of
	  no argument), when foo[0] is not empty has been fixed.
06-11-16  The discipline functions have been modified to allow each subscript
	  to act independently.  Currently, the discipline function will not
	  be called when called from a discipline function of the same variable.
06-11-14  A bug which could cause a core dump if a file descriptor for
	  an internal file was closed from with a subshell has been fixed.
06-10-30 +The redirections <# pattern, and <## pattern have been added.
	  Both seek forward to the beginning of the next line that contains
	  the pattern.  The <## form copies the skipped portion to standard
	  output.
06-10-26 +On systems that support stream control transport, the virtual file
	  name /dev/sctp/host/port can now be used to establish connections.
06-10-26 +The printf modifier # when used with d produces units in thousands
	  with a single letter suffix added.  The modifier # when used with
	  the i specification provides units of 1024 with a two letter suffix.
06-10-24  The value of $! is now set to the process id of a job put
	  into the background with the bg command as required by POSIX.
06-10-23  A bug in which the value of $! was affected by a background
	  job started from a subshell has been fixed.
06-10-23  A bug in ${var:offset:len} in multibyte locales has been fixed.
06-10-15 +The remaining math functions from C99 were added for any system
	  that supports them.
06-10-13  The klockwork.com software detected a few coding errors that
	  have been fixed.
06-10-12  A bug when skipping over `...` with ${x:=`...`} when x is set
	  has been fixed.
06-10-11  A bug in process floating constants produced by the %a format
	  of printf has been fixed.
06-10-06  A bug in which IFS was not being restored correctly in some
	  cases after a subshell has been fixed.
06-10-06  A bug in which pipefail was not detecting some failures in
	  pipelines with 3 or more states has been fixed.
06-10-03  A bug in the processing of >(...) with builtins which could
	  cause the builtin to hang has been fixed.
06-10-03  A bug in the for loop optimizer which causes >(...) process
	  substitution to be ignored has been fixed.
06-09-17 +The -a option was added to typeset for indexed arrays.  This
	  is only needed when using the ([subscript]=value ...) form.
06-09-06 +The showme option was added.  Each simple command not beginning
	  with a redirection and not occurring with in the while, until, if,
	  select condition can be preceded by a semi-colon which will
	  be ignored when showme is off.  When showme is on, any command
	  preceded by a colon will be traced but not executed.
06-08-16 +As a new feature, a leading ~(N) on a pattern has no effect
	  except when used for file expansion.  In this case if not
	  matches are found, the pattern is replaced by nothing rather
	  than itself.
06-08-11  A bug in the expansion of ${.sh.match[i]:${#.shmatch[i]}} has
	  been fixed.
06-08-10 +The read builtin options -n and -N have been modified to treat
          the size as characters rather than bytes unless storing into a
	  binary (typeset -B) variable.
06-07-27 +When the here document operator << is followed directly by a #
	  rather than a -, the first line of the here-document determines
	  how much whitespace is removed for each line.
06-07-26  A bug in the C-shell history (enabled with set -H) in which the
	  history event !$ was not processed has been fixed.
06-07-21  A bug on some systems in which assigning PATH on a command line
	  would not take effect has been fixed.
06-07-20  Add ksh93 and rksh93 as allowable names for ksh binaries.
06-07-20  Removed the SHOPT_OO compilation option which was only partially
	  implemented.
06-07-20  The ability to use egrep, grep, and fgrep expressions within
	  shell patterns has been documented.
06-07-17  A bug with arithmetic command expressions for locales in which
	  the comma is a thousands separator has been fixed.
06-07-13 +The default HISTSIZE was increased from 128 to 512.
06-07-13  A multibyte problem with locales that use shift codes has been fixed.
06-06-23  A number of bug fixes for command, file, and variable completion
	  have been mode.
06-06-20 +Floating point division by zero now yields the constant Inf or -Inf
	  and floating functions with invalid arguments yield NaN.
06-06-20 +The floating point constants Inf and NaN can be used in arithmetic
	  expressions.
06-06-20 +The functions isinf(), isnan(), tanhl() have been added for
	  arithmetic expressions.
06-06-13  Internal change to use ordering for variables instead of hashing
	  to speed up prefix matching.
06-06-13  A window between fork/exec in which a signal could get lost
	  and cause a program to hang has been eliminated
06-06-13  A bug in edit completion with quoted strings has been fixed.
06-06-07  The restricted options can now be enabled by set as well as on
	  the command line.  Once set, it can not be disabled.
06-06-04  Modified built-in binding so that for systems for which /bin
          and /usr/bin are the same, a builtin bound to /bin will get
	  selected when either /bin or /usr/bin is scanned.
06-06-04 +Added literal-next character processing for emacs/gmacs mode.
	  This change is not compatible with earlier versions of ksh93
          and ksh88 when the stty lnext is control-v.  The sequence
	  escape-control-v will display the shell version.
06-05-31 +Modified emacs and vi mode so that entering a TAB after a partial
	  TAB completion, generates a listing of possible completions.
	  After the second TAB, a number followed by a TAB will perform
	  the completion with the corresponding item.
06-05-19 +Modified arithmetic so that conversions to strings default to
	  the maximum number of precision digits.
06-05-16  Bug fixes for multibyte locales.
06-05-10  The =~ operator was added to [[ ... ]] and  [[ string ~= ERE ]]
	  is equivalent to [[ string == ~(E)ERE ]].
06-04-25  A bug in the vi edit mode which could cause the shell to core dump
	  when switching from emacs mode.
06-04-17  A bug in which using LANG or LC_ in assignment lists with builtins
	  did not restore the locale correctly has been fixed.
06-04-04  A bug in which discipline functions could not be added to variables
	  whose names started with .sh has been fixed.
06-03-28 +The -s option to typeset was added to modify -i to indicate short
	  integers.
06-03-28  A bug in which variables assignment lists before functions
	  defined with function name were not passed on the functions
	  invoked by this function has been fixed.
06-03-28  A bug in which name references defined within a function defined
	  with function  name could not be used with compound variables has
	  been fixed.
06-03-27  A bug in which read <&p (print >&p) would cause the coprocess input
	  (output) pipe to close before reading from (after writing to)
          it has been fixed.
06-02-28  A bug in which stopping a job created with the hist builtin command
	  would create a job that could not be restarted has been fixed.

06-01-24  --- Release ksh93r  ---
06-01-24  A bug in which running commands with standard output closed would
	  not work as expected has been fixed.
06-01-23  A bug in which print -u<n> could fail when file descriptor <n> was
	  open for writing has been fixed.
06-01-19  The ?: arithmetic operator fixed to work when the operation after
	  the colon was an assignment.
05-12-24  A bug which could lead to a core dump when elements of a compound
	  variable were array elements, i.e. foo=(bar=(1 2)), has been fixed.
05-12-13  An arithmetic bug in which x+=y+=z was not working has been fixed.
05-12-13  An arithmetic bug in which x||y was returning x when x was non-zero
	  rather than 1 has been fixed.
05-12-07 +The aliases for integer and float have been changed to use attributes
	  -li and -lE to handle long long and long double types.
05-12-07 +The histexpand (-H) option has been added which allows C-shell
	  style history expansions using the history character !.
05-12-07 +The multiline option was added which changes that way the edit
	  modes handle lines longer than the window width.  Instead of
	  horizontal scrolling, multiple lines on the screen are used.
05-12-05  The whence builtin now returns an absolute pathname when the
          command is found in the current directory.
05-11-29  A bug which caused ksh -c '[[ ! ((' to core dump rather than
	  report a syntax error has been fixed.
05-11-29  A bug when reading fixed length records into typeset -b variables
	  which caused a zero byte to terminate the value has been fixed.
05-11-22 +The ability to seek to an offset within a file has been added
	  with the new I/O redirection operators, <#  and >#.  Currently,
	  these redirection operators must be followed by ((expr))
	  but in a future release, it should be able to used to seek forward
	  to the specified shell pattern.  In addition $(n<#) expands to the
	  current byte offset for file descriptor n.
05-11-22 +The .sh.match array variable is now set after each [[ ... ]]
	  pattern match.  Previously it was only set for substring matches.
05-10-17  A bug in which the library path variable could be prefixed
          with a directory when a .path file was not encountered in
	  the directory of the executable has been fixed.
05-09-15  A for/while loop optimizer bug in which $OPTIND was not
	  correctly expanded has been fixed.
05-09-05  A bug in which a history command that invoked a history
	  command could go into an infinite loop has been fixed.
05-08-31 +In the case that IFS contains to adjacent new-lines so that
	  new-line is not treated as a space delimiter, only a single
	  new-line is deleted at the end of a command substitution.
05-08-19 +When a tilde expansion expands to the / directory and is
	  followed by a /, it is replaced by the empty string.
05-08-16  A bug in which n<&m did not synchronize m has been fixed.
05-08-16  A bug in which process substitution  ( <() and >() ) was not
	  working within for and while loops has been fixed.
05-07-24  A bug in which the pattern ~(E)(foo|bar) was treated as a syntax
	  error has been fixed.
05-07-24  A bug in completion with <n>=, where n was the one of the
	  previous selection choices has been fixed.
05-07-21  A bug with multibyte input when no edit mode was specified which
	  caused the input line to shift left/right has been fixed.
05-06-24  A race condition which could cause the exit status to get lost
	  on some fast systems has been fixed.
05-06-21  A bug in which nested patterns of the form {m,n}(pat) would cause
	  syntax errors has been fixed.
05-06-21  A bug in the macro expander has been fixed which could cause a
          syntax error for an expansion of the form ${x-$(...)} when
	  x is set and the command substitution contained certain strings.
05-06-08 +On systems for which echo does not do System V style \ expansions,
	  the -e option was added to enable these expansion.
05-06-08  A bug in which ${var op pattern} to not work when inside an
	  arithmetic expression has been fixed.
05-05-23 +An extension to shell patterns that allows matching of nested
	  groups while skipping over quoted strings has been added.
05-05-18  A bug in which the line number for errors was not correct for
          functions loaded from FPATH has been fixed.
05-04-18  A bug in which the exit status $? is not set when a trap triggered
	  by the [[ ... ]] command is executed has been fixed.
05-04-08 +Redirection operators can be directly preceded with {varname}
	  with no intervening space, where varname is a variable name which
	  allows the shell to select a file descriptor > 10 and store it
	  into varname.
05-04-08 +SHOPT_CMDLIB_BLTIN=1 now includes <cmdlist.h> generated table.
05-04-07 +[[ -o ?option ]] is true if "option" is a supported option.
05-04-05  A bug in handling file completion with spaces in the names
          has been fixed.
05-03-25 +The SIGWINCH signal is caught by default to keeps the LINES and
	  COLUMNS variables in sync with the actual window size.
05-03-25 +Building ksh with SHOPT_REMOTE=1 causes ksh to set --rc if stdin is
	  a socket (presumably part of a remote shell invocation.)
05-03-25 +Building ksh with SHOPT_SYSRC=1 causes interactive ksh to source
	  /etc/ksh.kshrc (if it exists) before sourcing the $ENV file.
05-03-25 +{first..last[..incr][%fmt]} sequences added to brace expansions
	  when braceexpand is enabled.
05-03-03  A bug where a SIGCHLD interrupt could cause a fifo open to fail has
	  been fixed.
05-02-25  A bug in which a builtin command run in the background could
	  keep a file descriptor open which could cause a foreground
	  process to hang has been fixed.
05-02-24  A bug where builtin library commands (e.g., date and TZ) failed to
	  detect environment variable changes has been fixed.
05-02-22 +The read builtin and word splitting are now consistent with respect
	  to IFS -- both treat IFS as field delimiters.
05-02-22 +The read builtin no longer strips off trailing delimiters that
	  are not space characters when there are fewer variables than fields.
05-02-17  A builtin bug on systems where dlsym(libcmd) returns link-time
	  bindings has been fixed.
05-02-12  A bug in which the lib_init() function for .paths BUILTIN_LIB
	  libraries was not called has been fixed.
05-02-06  A bug on some systems in which moving the write end of a co-process
	  to a numbered file descriptor could cause it to close has been fixed.
05-02-06  A bug in the vi-edit mode in which the character under the cursor
	  was not deleted in some cases with the d% directive has been fixed.
05-02-06  A bug where external builtin stdout/stderr redirection corrupted
          stdout has been fixed.
05-02-04  A bug where times formatting assumed CLK_TCK==60 has been fixed.

05-01-11  --- Release ksh93q  ---
05-01-11  A bug in the integral divide by zero check has been fixed.
05-01-11 +The -l option has been added to read /etc/profile and
	  $HOME/.profile, if they exist, before the first command.
05-01-11  An argument parsing bug that caused `kill -s x -- n' to fail has
	  been fixed.
05-01-11 +The .paths file, introduced in ksh93m, which can appear in
	  any directory in PATH, now allows a line of the form 'BUILTIN_LIB=.'
	  When a command is searched for this directory, and the full path
	  matches the path of the built-in version of the command (listed
	  by the 'builtin' command) then the built-in version of the command
	  is used.  When ksh is built with SHOPT_CMDLIB_DIR=1 then all libcmd
	  functions become builtins with the '/opt/ast/bin/' directory prefix.
05-01-10  A bug in which a nameref to a compound name caused a core dump has
	  been fixed.
05-01-09  A bug in which some SIGCHLD interrupts (from child processes exiting)
	  caused a fatal print/echo error diagnostic has been fixed.
04-12-24  A bug in which some SIGCHLD interrupts (from child processes exiting)
          corrupted the internal process/job list, sometimes causing the shell
	  to hang, has been fixed.
04-12-01  A bug in which typeset -Fn truncated less than n digits for large
	  numbers has been fixed.
04-11-25  A bug in which standard error could be closed after a redirection
	  to /dev/stderr has been fixed.
04-11-17  A bug in which an expansion of the form ${array[@]:3} could expand
          to ${array[0]} when ${array[3]} was not set has been fixed.
04-10-22 +The -E or -orc command line option reads ${ENV-$HOME/.kshrc} file.
04-10-22 +`-o foo' equivalent to `+o nofoo', `-o nobar' equivalent to `+o bar'.
          `--foo' equivalent to `-o foo', `--nofoo' equivalent to `+o foo'
04-10-05 +The .paths file, introduced in ksh93m, which can appear in
	  any directory in PATH, now allows a line of the form
	  'BUILTIN_LIB=libname'.  When a command is searched for this directory,
	  the shared library named by libname will first be searched for a
	  built-in version of the command.
04-09-03  <<< here documents now handle quotes in the word token correctly.
04-08-08 +The maximum size for read -n and read -N was increased from
	  4095 to 32M.
04-08-04 +printf %q was modified so that if an no operand was supplied, no
	  no output would be generated rather than a quoted empty string.
04-08-01 +The -n and -N options of the read builtin has been modified
	  when reading variables with the binary attribute so that the
	  data is stored directly rather than through assignment.
04-08-01 +The shcomp command has been modified to process alias commands
	  under some conditions.
04-07-31 +The .sh.match variable added in ksh93l, now works like other
	  indexed arrays.
04-07-08  A loop optimizer bug which occurs when typeset is used in
	  a for or while loop inside a function has been fixed.
04-06-24 +The number of subexpressions in a pattern was increased to 64
	  from the current number of 20.
04-06-17 +The -t option to read was modified to allow seconds to be
	  specified as any arithmetic expression rather than just
	  an integral number of seconds, for example even -t 'sin(.5)'
	  is now valid.
04-06-16  Two small memory leak problems were fixed.
04-06-15  A bug in ${var/pattern/"string"} which occurred when string
	  contained pattern matching characters has been fixed.
04-05-08  printf $'%d\n' produced an erroneous error message and has
	  been fixed.
04-05-24  A bug in which an associative array without any elements could
	  cause a core dump when a script with an associative array with
	  the same name was declared in a script invoked by name has
	  been fixed.
04-05-11  A bug in which an exec statement could close the script that
	  is being processed in a script that is run by name causing
	  a failure has been fixed.
04-04-28 +If the first character of assignment to an integer variable was 0,
          the variable had been treated as unsigned.  This behavior was
          undocumented and has been removed.
04-04-05  A bug in which the positioning of standard input could be incorrect
	  after reading from standard input from a subshell has been fixed.
04-03-30  A bug in the for loop optimizer which in rare cases could cause
	  memory corruption has been fixed.
04-03-29 +The preset alias source='command .' has been added.
04-03-29  A bug introduced in ksh93p on some systems in which invoked by
	  name with #! on the first line would not get the signals handling
	  initialized correctly has been fixed.
04-03-29  A bug introduced in ksh93p in which a HUP signal received by
	  a shell that is a session group leader was not passed down to
	  its children has been fixed.

04-02-28  --- Release ksh93p  ---
04-02-28 +The ability to apply an append discipline to any variable has
	  been added.
04-02-14  A bug in which the exportall option (set -a) would cause incorrect
	  results for arrays has been fixed.
04-02-02  A bug in which an exported array would pass more than
	  the first element to a script invoked by name has been fixed.
04-02-02  A bug on some systems in which name=value pairs preceding a script
	  invoked by name was not getting passed to the script has been fixed.
04-01-20  A bug in which an unset discipline function could cause a core
	  dump on some systems has been fixed.
04-01-12  A bug in which a continue or break called outside a loop from
	  inside a function defined with name() syntax could affect
	  the invoking function has been fixed.
04-01-08  If a command name begins with ~, only filename completion will be
	  attempted rather than pathname completion using the builtin editors.
04-01-08  A bug in the vi edit mode in which the wrong repeat count on
	  multiple word replacements with the . directive has been fixed.
04-01-06  Backspace characters are now handled correctly in prompt strings.
04-01-06 +The getopts builtin has been modified to accept numerical
	  arguments of size long long on systems that support this.
04-01-06  A bug in which unsetting all elements of an associative array
	  would cause it to be treated as an indexed array has been fixed.
03-12-15  A bug in which a quoted string ending with an unescaped $ would
	  delete the ending $ in certain cases has been fixed.
03-12-05  A bug in which the shell could hang when set -x tracing a command
	  when an invalid multibyte character is encountered has been fixed.
03-12-05  On some systems, if the KEYBD trap is set, then commands that use
	  the meta key were not processed until return was hit.  This
	  has been fixed.
03-12-05  A problem which occurred when the login shell was not a group
	  leader that could cause it to fail has been fixed.
03-12-05  A problem in which a shell could core dump after receiving a signal
	  that should cause it to terminate while it was in the process
	  of acquiring more space has been fixed.
03-12-05 +If ENV is not specified, the shell will default to $HOME/.kshrc
	  for interactive shells.
03-11-21  A bug introduced in ksh93o in which the DEBUG trap could get
	  disabled after it triggered has been fixed.
03-11-04  A bug in which using arithmetic prefix operators ++ or -- on a
	  non-lvalue could cause a core dump has been fixed.
03-11-04  A bug in which leading zeros were stripped from variable
	  expansions within arithmetic computation to avoid being treated
	  as octal constants when they should not have, has been fixed.
03-10-08  A bug introduced in ksh93o in which a large here document inside
	  a function definition could get corrupted has been fixed.
03-09-22  A bug in which the .get discipline function was not being
	  called when a string variable was implicitly referenced from
	  within a numerical expression has been fixed.
03-09-22  A bug in which a script without a leading #! could get executed
	  by /bin/sh rather than the current shell on some systems has
	  been fixed.
03-09-12 +To improve conformance with ksh88, leading zeros will be ignored
	  when getting the numerical value of a string variable so that
	  they will not be treated as octal constants.
03-09-03 +The builtin kill command now processes obsolete invocations
	  such as kill -1 -pid.
03-09-02  The restriction on modifying FPATH in a restricted shell (sh -r)
	  has been documented.
03-09-02 +The restricted shell (sh -r) has been modified to disallow
	  executing command -p.
03-08-07  A bug in which the KEYBD trap was not being invoked when
	  characters with the 8th bit set has been fixed.
03-08-02  A parser bug introduced in ksh93o which caused the character
	  after () in a POSIX function definition to be skipped
	  when reading from standard input has been fixed.
03-08-01  A bug in which "${foo#pattern}(x)" treated (x) as if it were
	  part of the pattern has been fixed.
03-08-01 +The command -x option has been modified so that any trailing
	  arguments that do expand to a single word will be included
	  on each invocation, so that commands like command -x mv * dir
	  work as expected.

03-07-20  --- Release ksh93o+  ---
03-07-20  A bug in which could cause memory corruption when a POSIX
	  function invoked another one has been fixed.
03-07-15  A bug in which a file descriptor>2 could be closed before
	  executing a script has been fixed.
03-07-15  A parsing error for <() and >() process substitutions inside
	  command substitution has been fixed.
03-07-15  A parsing error for patterns of the form {...}(...) when
	  used inside ${...} has been fixed.
03-07-15  An error in which expanding an indexed array inside a compound
	  variable could cause a core dump has been fixed.
03-07-15  A bug in which on rare occasions a job completion interrupt
	  could cause to core dump has been fixed.
03-06-26  A bug in which process substitution embedded within command
	  substitution would generate a syntax error has been fixed.
03-96-23  A bug in which ${@:offset:len} could core dump when there
	  were no arguments has been fixed.
03-96-23  A bug in which ${X[@]:offset:len} could core dump when X
	  was unset has been fixed.
03-06-22 +The -x option was added to the command builtin.  If this
	  option is on, and the number of arguments would exceed ARG_MAX,
	  the command will be invoked multiple times with a subset of
	  the arguments.  For example, with alias grep='command -x grep,
	  any number of arguments can be specified.
03-06-14  A bug in which could cause a core dump on some systems with
	  vi and emacs editors with the MULTIBYTE option has been fixed.
03-06-06  A bug in which the shell could core dump when a script was
	  run from its directory, and the script name a symlink to a file
	  beginning with .., has been fixed.
03-06-05  A bug in which the shell could core dump when a child process
	  that it is unaware of terminates while it is calling malloc()
	  has been fixed.
03-06-02 +An option named globstar (set -G) has been added.  When enabled,
	  during pathname expansion, any component that consists only of ** is
	  matches all files and any number of directory levels.
03-05-30  A bug in which the PATH search could give incorrect results when
	  run from directory foo and PATH contained .:foo:xxx has been fixed.
03-05-29 +Some changes were made to the code that displays the prompt in edit
	  mode to better handle escape sequences in the prompt.
03-05-27  I added = to the list of characters that mark the beginning of
	  a word for edit completion so that filenames in assignments
	  can be completed.
03-05-20  A bug in which read -N could hang on some systems when reading
	  from a terminal or a pipe has been fixed.
03-05-19  A bug in which the output of uname from a command substitution
	  would go to the standard output of the invoking command when
	  uname was invoked with a non-standard option has been fixed.
03-05-19  A job control bug which would cause the shell to exit because
	  it hadn't taken back the terminal has been fixed.  The bug
	  could occur when running a function that contained a pipeline
	  whose last element was a function.
03-05-19  A job control timing bug introduced in ksh93o on some systems
	  which could cause a pipeline to hang if the first component
	  completed quickly has been fixed.
03-05-13 +The read builtin has been modified so that the builtin editors
	  will not overwrite output from a previous incomplete line.
03-05-13  A bug in which the name of an identifier could have the string
	  .sh. prefixed to it after expanding a variable whose name begins
	  with .sh. has been fixed.
03-05-13  A bug in the expansion of $var for compound variables in which
	  some elements would not be output when the name was a prefix
	  of another name in the compound variable has been fixed.
03-05-08  The last item in the ksh93o release on 03-01-02 has been
	  altered slightly to preserve the leading 0's when the
	  preceding character is a digit.  Thus, with typeset -LZ3 x=10,
	  $(( 1$x)) will be 1010 whereas $(( $x) will be 10.
03-04-25  A bug in which if x is a name reference, then nameref y=x.foo
	  did not follow x has been fixed.

03-03-18  --- Release ksh93o  ---
03-03-18 +A -N unary operator was added to test and [[ ... ]] which returns
	  true if the file exists and the file has been modified since it
	  was last read.
03-03-18 +The TIMEFORMAT variable was added to control the format for
	  the time compound command.  The formatting description is
	  described in the man page.
03-03-06 +A -N n option was added to read which causes exactly n bytes
	  to be read unlike -n n which causes at most n bytes to be read.
03-03-03 +Three new shell variables were added.  The variable .sh.file
	  stores the full pathname of the file that the current command
	  was found in.  The variable .sh.fun names the current function
	  that is running.  The variable .sh.subshell contains the depth
	  of the current subshell or command substitution.
03-03-03 +When the DEBUG trap is executed, the current command line after
	  expansions is placed in the variable .sh.command.  The trap
	  is also now triggered before each iteration of a for, select,
	  and case command and before each assignment and redirection.
03-02-28 +Function definitions are no longer stored in the history file so
	  that set -o nolog no longer has any meaning.
03-02-28 +All function definitions can be displayed with typeset -f not
	  just those stored in the history file.  In addition, typeset +f
	  displays the function name followed by a comment containing the
	  line number and the path name for the file that defined this function.
03-02-28  A bug in which the value of $LINENO was not correct when executing
	  command contained inside multi-line command substitutions has been
	  fixed.
03-02-19 +Since some existing ksh88 scripts use the undocumented and
	  unintended ability to insert a : in front of the % and # parameter
	  expansion operators, ksh93 was modified to accept :% as equivalent
	  to % and :# as equivalent to # with ${name op word}.
03-02-14  A bug which could cause a core dump when reading from standard
	  error when standard error was a pty has been fixed.
03-02-14 +The shell arithmetic was modified to use long double on systems
	  that provide this data type.
03-02-09  A bug in which a function located in the first directory in FPATH
	  would not be found when the last component of PATH was . and the
	  current directory was one of the directories in PATH has been fixed.
03-02-07 +The trap and kill builtin commands now accept a leading SIG prefix
	  on the signal names as documented.
03-02-05  A bug in the expansion of ${var/$pattern}, when pattern contained
	  \[ has been fixed.
03-02-05  A bug in which .sh.match[n], n>0, was not being set for substring
	  matches with % and %% has been fixed.
03-01-15  A bug in which getopts did not work for numerical arguments specified
	  as n#var in the getopts string has been fixed.
03-01-09  A bug in which using ${.sh.match} multiple times could lead to
	  a memory exception has been fixed.
03-01-06  A bug in the expansion of ${var/pattern/$string} in the case that
	  $string contains \digit has been fixed.
03-01-02 +A -P option was added for systems such as Solaris 8 that support
	  profile shell.
03-01-02  For backward compatibility with ksh88, arithmetic expansion
	  with ((...)) and let has been modified so that if x is a zero-filled
	  variable, $x will not be treated as an octal constant.

02-12-05  --- Release ksh93n+  ---
02-11-30  A bug that can show up in evaluating arithmetic statements that
	  are in an autoloaded function when the function is autoload from
	  another function has been fixed.
02-11-30  An optimization bug in which an expansion of the form ${!name.@},
	  which occurred inside a for or a while loop, when name is a name
	  reference, has been fixed.
02-11-18  A bug in which modifying array variables in a subshell could leave
	  side effects in the parent shell environment has been fixed.
02-11-18  A memory leak when unsetting an associative array has been fixed.
02-11-14 +The code to display compound objects was rewritten to make
	  it easier for runtime extensions to reuse this code.
02-11-14 +A change was made to allow runtime builtins to be notified when
	  a signal is received so that cleanup can be performed.
02-10-31 +User applications can now trap the ALRM signal.  Previously,
	  the ALRM signal was used internally and could not be used
	  by applications.
02-10-31  A bug in which signals received while reading from a coprocess
	  for which traps were set was not handled correctly has been fixed.
02-10-31  A bug in which a file opened with exec inside a subshell could
	  be closed before the subshell completed has been fixed.
02-10-21  A bug in which setting PATH or FPATH inside a function might not
	  take effect has been fixed.
02-10-21  A bug which could cause a core dump when a local SECONDS variable
	  is defined in a function has been fixed.
02-10-15  A bug in which the associative array name operator ${!array[@]}
	  could return the same name multiple times has been fixed.
02-10-15  A bug in which the zero'th element of an associative array was
	  not getting set when an assignment was made without a subscript
	  specified has been fixed.

02-09-30  --- Release ksh93n  ---
02-09-30 +The maximum indexed array size was increased to 16Megs.
02-09-30  A bug which could cause a core dump when changing attributes
	  of associative array has been fixed.
02-09-30  A bug in which exporting an array variable would not export the
	  0-th element has been fixed.
02-09-30  A bug in which an array assignment of the form a=($a ...) would unset
	  'a' before the right hand side was evaluated has been fixed.
02-09-27  A bug in which the error message for ${var?message} when var was
	  null or unset did not contain the variable name var has been fixed.
02-09-27  A bug in which closing file descriptors 0 through 2 could
	  cause a subsequent here document to fail has been fixed.
02-09-14  A bug in whence which occurs when the specified name contained
	  a / has been fixed.
02-09-14  A bug in the parser for strings of the form name$((expr))=value
	  has been fixed.
02-09-14  A for loop optimization bug in which the number of elements in
	  an array was treated as an invariant has been fixed.
02-09-09  A bug in which redirection or closing of a file descriptor between
	  3 and 9 could cause a subsequent here document to fail has been
	  fixed.
02-09-09  A bug in which a background job was not removed from the job list
	  when a subshell completed has been fixed, for example (prog&).
02-09-03  A bug in which an assignment of the form name=(integer x=3)
	  could be interpreted as an array assignment rather than a
	  compound variable assignment has been fixed.
02-08-19  A command completion bug which occurred on file systems that
	  are case insensitive has been fixed.
02-08-19  A bug which could lead to an exception on some systems (for
	  example FREEBSD) which occurred when setting PATH has been fixed.
02-08-11  A bug in arithmetic rounding in which a value input as a decimal
	  string would output as a rounded version of the string has
	  been fixed.
02-08-11  A bug in which the last character could be deleted from shell
	  traces and from whence when called from a multibyte locale
	  has been fixed.
02-08-01  A bug which could cause a core dump to occur when a shell script
	  is executed while a coprocess is running that has closed the
	  output pipe has been fixed.
02-08-01  A bug in which command completion in multibyte mode could
	  corrupt memory for long command lines has been fixed.

02-06-17  --- Release ksh93n-  ---
02-06-17  A bug in which user defined macros could cause a core dump in
	  with MULTIBYTE mode has been fixed.
02-06-17  A bug in which printf format specifiers of the form %2$s were causing
	  a core dump has been fixed.
02-06-17  A bug in which setting stty to noecho mode did not prevent the
	  echoing of characters by ksh when emacs or viraw mode
	  was enabled has been fixed.
02-06-17  A bug in which background job completion could cause the sleep
	  builtin to terminate prematurely has been fixed.
02-06-17  A bug in which the shell could core dump if getopts was called
	  when the OPTIND variable contained a negative value has been fixed.
02-06-10 +The edit mode prompt has been modified to handle escape sequences.
02-06-10  A bug which occurred for interactive shells in which the builtin
	  cat command was used in command substitution on a file whose
	  size was larger than PIPE_BUF has been fixed.
02-06-10  A bug in which the trap on ERR was not being processed when
	  set inside a function has been fixed.
02-06-07  A bug in which function definitions could cause the history count
	  to be decremented by one (and even become negative) has been fixed.
02-06-05  A bug in read in which share mode could be enabled has been fixed.
02-05-28  A bug which could occur when the last command of a script was
	  a case statement and the action selected ended in ;& instead of ;;
	  has been fixed.
02-05-23  A bug with unary + introduced in ksh93k has been fixed.
02-05-07  A bug in substitutions of the form ${var/pattern/string} in which
	  a backslash was inserted in the replacement string when it contained
	  a special pattern character has been fixed.
02-05-01  A bug in the emacs edit mode which occurred in versions compiled
	  for multibyte character sets which occurred when a repeated search
	  was requested after a long line had been returned for the previous
	  search has been fixed.
02-04-02 +vi and emacs edit modes were modified so that tab completion is
	  disabled when invoked from the read built-in.

02-03-26  --- Release ksh93m+  ---
02-03-26  A bug in which \ was not handled correctly when used in file
	  expansion has been fixed.
02-02-18  A bug in which lines beginning with a # were deleted from here
	  documents when the here-document delimiter was followed by
	  a comment has been fixed.
02-12-06  An optimization bug in which ${!x[@]) was treated as invariant in
	  a for loop has been fixed.
02-02-06  A bug in which the ERR trap is not cleared for a script invoked
	  by name from within a function has been fixed.
02-01-08  A bug in which a shell script executed from within a subshell
	  could cause this script to have an invalid pointer leading
	  to a memory fault has been fixed.
02-01-07 +Added here documents of the form <<< word (as per zsh) which
	  is equivalent to << delim\nword\ndelim.
02-01-07  A bug in which the first word of a compound assignment,
	  x=(word ...), was treated as a reserved word has been fixed.
02-01-07  A bug in the handling of \ when noglob was enabled and a
	  substitution of the form ${word op pattern} occurred in the
	  same word has been fixed.
02-01-07 +A compilation option, CMDLIB_BLTIN in the file OPTION, has
	  been added.  When this options is set, all commands implemented
	  in libcmd become shell builtin commands by default.
02-01-07  A bug in which builtin foo, where foo is already a builtin
	  would result in the builtin foo getting removed has been fixed.
02-01-07  A bug which the shell executed a command found in the current
	  directory when PATH have no valid directories has been fixed.
01-11-28  The value of $? was not being set when called with exit.
01-11-28  If the last command was of the form (...) and a trap on EXIT or
	  ERR was set, and the command inside () modified the trap, then
	  the original trap wasn't executed.
01-11-26 +The value for 0 is now preceded by the base number when
	  the base was not 10.
01-11-26 +The default has compilation mode has been changes so that
	  viraw mode will always be on.

01-10-31  --- Release ksh93m  ---
01-10-31  A for loop optimizer bug for subshells contained within for
	  loops has been fixed.
01-10-16  typeset without arguments no longer outputs variable names
	  that do not have any attributes that are set.
01-10-16  A bug introduced in ksh93l in which assignments specified with
	  the exec built-in were not being expanded properly has been
	  fixed.
01-10-11  An optimization bug in which ${!x) was treated as invariant in
	  a for loop has been fixed.
01-10-11  Unsigned integer variables in bases other than 10 are printed now
	  expand in that base with the base prefix.
01-10-10  A number of typos in the self generating man pages for shell
	  built-ins have been fixed.
01-10-04  The self generated man pages for hist and fc were not working
	  correctly and have been fixed.
01-10-03  Yet another optimizer bug in which shell patterns were
	  treated as invariants has been fixed.
01-09-27  Two bugs relating to multibyte history searches and to find
	  have been fixed.
01-09-27  A bug introduced in ksh93k in which the PATH searching was
	  not restored after running a command with an assignment list
	  has been fixed.
01-09-26  A bug in which a zero filled field was treated as octal when
	  converted to integer has been fixed.
01-09-26  Yet another bug in the optimization of for loops related to
	  recursive functions with break or continue statements has been fixed.
01-09-25 +The exponentiation operator ** was added to the shell arithmetic
	  evaluation.  It has higher precedence than * and is left
	  associative.
01-09-25  The code was modified to use the AST multibyte macros
	  and functions for handling multibyte locales.
01-09-25 +The expansion ${parameter:offset:length} now handles negative
	  offsets which cause offsets to be measured from the end.
01-09-25  Some spelling errors in the documentation were corrected.
01-09-24 +The /dev/tcp/host/port and /dev/udp/host/port now allow
	  the ports to be specified by service name.
01-09-24 +The change starting with ksh93g in which the appropriate
	  library path variable is prepended with a corresponding library
	  directory has been modified.  With the new method, only the
	  library path defined in the file named .paths in the directory
	  where the executable is found will be modified.  See the
	  man page for more details.
01-09-23 +The .fpath file (see ksh93h) is no longer looked for in each
	  directory on the path to locate function directories.  The
	  file named .paths is used instead.
01-09-23  A bug in which IFS was not being restored after being changed in
	  a subshell has been fixed.
01-09-16 +With the vi and emacs edit modes, after a list of command
	  or functions is generated with = or M-= respectively,
	  any element from the list can be pasted on the command line
	  by preceding the = or M-= with a numeric parameter specifying
	  the position on the list.
01-09-16  A bug in ksh93l caused command completion not to find aliases
	  and functions.  Command listing from the edit mode was presented
	  in reverse order.  This has been fixed.
01-09-13  Another bug in the optimization of for loops related to subshells
	  when traps were set has been fixed.
01-09-07  A change in ksh93l caused brace expansion to stop working
	  and this has been fixed.
01-09-04  A bug introduced in ksh93k in which an arithmetic statement
	  within a function that used name references did not follow the
	  reference has been fixed.
01-09-04  A bug introduced in ksh93l in which export -p did not prefix
	  each export with the word export has been fixed.
01-08-29  A bug in multibyte input which occurred when a partial multibyte
	  character was received has been fixed.
01-08-29  A bug introduced in ksh93l which could cause a core dump
	  when an assignment list containing PATH is specified inside
	  command substitution has been fixed.
01-08-09  Another bug in the optimization of for loops in ksh93l caused
	  errors in recursive functions using local variables that
	  contained for loops has been fixed.
01-07-27  A bug in which IFS would be unset after a command substitution
	  inside a here document has been fixed.
01-07-26  To conform to the POSIX standard, if you invoked ksh name,
	  and name does not contain a /,  it will first try to run
	  one in the current directory whether it is executable or not
	  before doing a path search for an executable script.  Earlier
	  versions first checked for an executable script using the
	  PATH variable.
01-07-23  A bug in which unset -f invoked in a subshell could unset a
	  function defined in the parent has been fixed.
01-07-16  A bug in the optimization of for loops in ksh93l caused
	  name references to be treated as invariants has been fixed.
01-07-09  A bug in which a discipline function applied to a local variable
	  could cause a shell exception has been fixed.  Discipline
	  functions can only be specified for global variables.

01-06-18  --- Release ksh93l  ---
01-06-18  A bug in assigning integers larger than can be represented as
	  long integers to floating point variables has been fixed.
01-06-18  A bug in the handling of unsigned integers (typeset -ui) has
	  been fixed.
01-06-04  The evaluation of the PS1 prompt no longer affects the value
	  of the $? variable.
01-06-01  A small memory leak from subshells has been fixed.
01-05-22  A bug in which attributes for variables that did not have
	  values would be lost after a subshell has been fixed.
01-05-22 +The %R format has been added to convert a shell pattern into
	  an extended regular expression.
01-05-22 +The escape sequences \e, \cX, \C[.collating-element.], and
	  \x{hex} have been added to ASCII-C strings and to printf format
	  strings.
01-05-20 +Patterns of the form {n}(pattern) and {m,n}(pattern) are now
	  recognized.  The first form matches exactly n of pattern whereas,
	  the second form matches from m to n instances of pattern.
01-05-20 +The shell allows *-(pattern), +-(pattern),  ?-(pattern),
	  {m,n}-(pattern}, and @-(pattern) to cause the minimal
	  match of pattern to be selected whenever possible rather
	  than the maximal (greedy) match.
01-05-20 +The character class [:word:] has been added to patterns.
	  The word class is the union of [:alnum:] and the character _.
01-05-20 +Inside (...) pattern groups, the \ character is now treated
	  specially even when in an enclosing character class.  The
	  sequences, \w, \d, \s are equivalent to the character classes
	  word, digit, and space respectively.  The sequences \W, \D,
	  and \S are their complement sets.
01-05-20 +The shell now recognizes pattern groups of the form
	  ~(options:pattern) where options or :pattern can be omitted.
	  Options use the letters + and - to enable and disable options
	  respectively.  The option letters g (greedy), i (ignore case)
	  are used to cause maximal matching and to cause case
	  insensitive matching respectively.  If :pattern is also
	  specified, these options are only in effect while this
	  pattern is being processed.  Otherwise, these options remain
	  in effect until the end of the pattern group that they are contained
	  in or until another ~(...) is encountered.  These pattern groups
	  are not counted with respect to group numbering.
01-05-14  When edit completion, expansion, or listing occurs in the
	  middle of a quoted string, the leading quote is ignored when
	  performing the completion, expansion, or listing.
01-05-14  A small memory leak from subshells has been fixed.
01-05-10  A bug in which open files were not restored after a subshell
	  that had used exec to replace a file has been fixed.
01-05-10 +Redirection to a null file name now generates an error message.
01-05-09  The shell now rejects some invalid parameter substitutions that
	  were previously processed in undefined ways.
01-05-09  A bug in which the output of select was not flushed before the
	  read when input did not come from the terminal has been fixed.
01-05-08  A bug in which job ids would not be freed for interactive shells
	  when subshells ran built-ins in the background has been fixed.
01-05-08 +The FPATH variable now requires an explicit . to cause the
	  current directory to be treated as a function directory.
01-05-08  A bug in read -n when echo mode was disabled has been fixed.
01-05-07  A bug in which function definitions could be listed as part
	  of the history has been fixed.
01-04-30 +This release uses a new and often much faster pattern matcher than
	  earlier releases.
01-04-30 +An optimizer now eliminates invariant parameter expansions from
	  for while and until loops.
01-04-30 +The variable .sh.match is set after each pattern match (# % or /)
	  in a variable substitution.  The variable .sh.match is an
	  indexed array with element 0 being the complete match.
	  The array is only valid until the next subsequent pattern
	  match or until the value of the variable changes which ever
	  comes first.
01-04-30 +A self generating man page has been added to shcomp.  Also,
	  shcomp now stops compiling when it finds an exit or exec
	  command and copies the remainder so that it can be used
	  for standard input.
01-04-30 +The shcomp command was modified so that it can work in an
	  EBCDIC environment and that binary scripts are portable
	  across environments.
01-04-30  A bug in the handling of a trailing : in PATH has been fixed.
01-04-30  A bug in which the builtin version of a command would get invoked
	  even though the full pathname for the command was specified
	  has been fixed.
01-04-30  A bug in which read would lose the last character when
	  reading the last line of a file that did not contain a new-line
	  character has been fixed.
01-04-23  A bug on some systems in which in vi mode the end of file
	  character and end of line character could be swapped has
	  been fixed.
01-04-23  A bug on some systems in which invoking a shell script that
	  did not have execute permission could set the exit value to
	  127 rather than 126 has been fixed.
01-04-20  A bug in which read -n from a pipe would block if fewer than
	  n characters was received has been fixed.
01-04-09  A bug in which invalid patterns, for example, ) by itself,
	  was not treated as a string has been fixed so that if i=')',
	  then [[ $i == $i ]] is true.
01-04-09 +The shell arithmetic now interprets C character constants.
01-04-09  A bug in which a non-zero return from a function defined
	  with the function reserved word did not trigger the ERR
	  trap or exit with set -e has been fixed.
01-04-02  A bug on some systems, in which characters above 127 were
	  not displayed correctly in vi or emacs edit mode has been fixed.
01-04-02  A bug on some systems, introduced in the 'k' point release, in
	  which the erase character in viraw mode was moving the cursor
	  to the left without erasing the character has been fixed.
01-04-02  On some systems the wcwith() function was returning a wrong
	  value for characters and caused characters to be displayed
	  incorrectly from the shell edit modes.  A work around for
	  this problem has been added.
01-03-26  A bug in which valid scripts could produce syntax errors
	  when run with locales that considered characters such as "'"
	  to be space characters has been fixed.
01-03-20  A bug in which an syntax error in an arithmetic expression
	  entered interactively could cause the shell to go into
	  an infinite loop outputting the error message has been fixed.
01-03-10 +ksh93 accepts -l as a synonym for -L in test on systems for
	  which /bin/test -l tests for symbolic links.
01-03-10  A bug in parsing scripts in which { and } are used in place of
	  in and esac in case statements embedded in compound commands
	  has been fixed.  Use of { and } for in and esac is obsolete.
01-03-06  A bug in which an argument of the form foo=bar was not
	  being passed correctly to a traced function whose name
	  was foo has been fixed.
01-03-02  Using $(trap -p name) did not print the name of the current
	  trap setting for trap name.
01-02-26  Exported floating point variables gave incorrect results
	  when passing them to ksh88.  This has been fixed.
01-02-25  A race condition in which a coprocess which completed too quickly
	  would not allow subsequent coprocesses to start has been fixed.
01-02-25  The 'g' format specifier is now handled by printf.  It had
	  inadvertently been omitted.
01-02-20  The + was not being displayed during an execution trace
	  with the += assignment operator.
01-02-19  The error message which occurs when the interpreter name
	  defined on the #! line does not exist is more informative.
01-02-19  A bug in which $0 would not be set correctly when a
	  script with #! was invoked by full pathname from the
	  directory of the script has been fixed.
01-02-19  A shell script did not always pick up tty mode changes
	  made by external commands such as stty which could
	  effect the behavior of read.
01-02-19  The -u, -g, and -k unary tests did not give the correct
	  results when used with negation and this has been fixed.

01-02-05  --- Release ksh93k+  ---
01-02-05  The sequence \<newline> inside $'...' was not incrementing
	  the line count and this has been fixed.
01-02-05 +Modified expansion of "${@-}" so that if no arguments are set
	  it results in null string rather than nothing.
01-02-02  memory leak problem with local variables in functions fixed.
01-01-25 +allow arithmetic expressions with float%int and treat them
	  as ((int)float)%int rather than as an error.
01-01-19  read -n1 was not working and has been fixed.
01-01-17 +ksh now handles the case in which a here document in command
	  substitution $() is terminated by the trailing ).  Previously,
	  a new-line was needed at the end of the delimiter word.
01-01-02  A bug in which a KEYBD trap would cause a multi-line token
	  to be processed incorrectly has been fixed.
00-12-10 +Arithmetic integer constants can now have L and U suffices.
00-12-10  A bug in the processing of arithmetic expressions with compound
	  variables when the -n option is on has been fixed.
00-12-08  A bug in M-f and M-b from emacs mode has been fixed.  This
	  bug only occurs when ksh93 is compiled without MULTIBYTE enabled.
00-11-29  A bug in which jobs -p would yield 0 for background
	  jobs run in a script has been fixed.
00-11-21  A bug in integer arrays in which the number of elements is
	  incorrect when the ++ operator is applied to a non-existing
	  element has been fixed.  For example, integer x; ((x[3]++)).
00-11-20  A timing bug in which the shell could reset the terminal
	  group to the wrong value in the case that the a new process
	  changes the terminal group during startup has been fixed.

00-10-27  --- Release ksh93k  ---
00-10-27  Using tab for completion now works only when applied
	  after a non-blank character at the end of the current line.
	  In other case a tab is inserted.
00-10-27  A bug in the emacs edit mode for ^X^E has been fixed.
	  The ^X^E sequence is supposed to invoke the full editor
	  on the current command.
00-10-18  A bug in which expansions of the form ${var//pattern/string}
	  did not work correctly when pattern was '/' or "/" has
	  been fixed.
00-10-18 +The output format for indexed arrays in compound variables
	  has been modified so that it can be used as input.
00-10-18  Assignments with name references (typeset -n) will now
	  implicitly unreference an existing name reference.
00-10-17  A bug the += append operator when a single array element
	  is appended to a variable that is not an array has been fixed.
00-10-16  A bug in which the SIGCONT signal was being sent to
	  each process will kill -0 or kill -n 0 has been fixed.
00-10-12 +The arithmetic evaluation portion has been rewritten to
	  perform a number of optimizations.
00-10-10  A bug in which name prefix matching ${!name.*} was not
	  checking name to see if it was a name reference has been fixed.
00-09-26  A bug in the multibyte version in which the width of for
	  non-printing characters was not correct has been fixed.
00-09-12 +Made changes to get multibyte editing work on UWIN for Windows.
00-09-12  A bug in which multibyte characters would be displayed incorrectly
	  has been fixed.
00-08-08  Removed build dependency on iswprint() and iswalph().
00-07-20  In some cases the read builtin would read more than a single
	  line from a pipe on standard input and therefore leave the seek
	  position in the wrong location.
00-07-05 +If the directory / is on the path, a / will not be inserted
	  between the directory and the file name during path searching
	  to avoid searching // for systems that treat this specially.
00-06-26  A bug in which on rare occasions wait could return before all
	  jobs have completed has been fixed.
00-06-21  A bug in which backspace did not work correctly during the
	  R replace directive in vi-mode has been fixed.
00-06-12 +Added variable name completion/expansion/listing to the set of
	  completions.  Variable name completions begin with $ or "$ followed
	  by a letter.
00-05-09  --- Release ksh93j  ---
00-05-09  Modified command substitution to avoid using /tmp files when
          run on read-only file systems.
00-04-17 +Modified printf to handle '%..Xc' and '%..Xs' options where X
	  is not an alpha character.  Previous versions core dumped with this.
00-04-10 +Changes to multibyte editing code were made to use standard
	  ISO C functions rather than methods devised before the standard.
00-04-09  Add %H options to printf to output strings with <"'&\t> properly
	  converted for use in HTML and XML documents.
00-04-07 +Modified getopts builtin to handle \f...\f in usage string
	  by invoking specified function.
00-04-04  Added self generating man pages for bg, fc, fg, disown, jobs,
	  hist, let, ., and ulimit.
00-03-30 +The append operator += has been added and can be used
	  for all assignments, strings, arrays, and compound variables.
00-03-30 +Code was modified in several places to support automatic
	  generation of C locale dictionaries.
00-03-28  A bug in which the set and trap commands invoked with --name
	  type arguments would terminate the invoking script has
	  been fixed.
00-03-27  A bug in which the library path variable was not updated
	  correctly on some systems as described in the 'g' point
	  release has been fixed.
00-03-07  printf now returns a non-zero exit status when one of
          its arguments cannot be converted to the given type.
00-03-05  The return value and error message for a command that
          was found on the path but was not executable was set
          incorrectly.
00-03-05  A prototype for ioctl() was removed from the vi edit mode.

00-01-28  --- Release ksh93i  ---
00-01-28 +Most of the built-in commands and ksh itself are now
          self documenting.  Running command --man will produce
          screen output.  Running command --html produces the
          man page in html format.
00-01-28 +The getopts builtin can process command description
          strings to produce man pages.
00-01-28  A bug in which a script could terminate when getopts
          encountered an error when invoked inside a function
          has been fixed.
00-01-28  When a symbolic link was specified as the name of
          the script to invoke by name, the value of $0 was
          set to the real file name rather than the link name
          in some cases and this has been fixed.
00-01-28  A bug in which the precision given as an argument
	  to printf was not working has been fixed.

99-03-31  --- Release ksh93h  ---
99-03-31 +The PATH search algorithm has been modified to look
	  for a file named .fpath in each bin directory and if
	  found, to search for functions in this directory if
	  it cannot find the command in that directory.
99-03-31 +When performing pathname expansion, the shell checks
	  to see whether each directory it reads is case sensitive
	  or not, and performs the matching accordingly.
99-03-31 +The %T format for printing formatted date/time.
99-03-31 +The emacs and vi modes now handle arrow keys when
          they use standard ANSI escape sequences.
99-03-31 +The TAB key can be used for completion in emacs and viraw mode.
99-03-31  A bug in setting .sh.editchar during the KEYBD trap
	  for the MULTIBYTE option was fixed in release ksh93h.
99-03-31  A bug in shcomp for compilation of unary operators with [[ ... ]]
	  has been fixed.
99-03-31  A bug in which the value of $? was changed when executing
	  a keyboard trap has been fixed.
99-03-31  The handling of SIGCHLD has been changed so that the
	  trap is not triggered while executing trap commands
	  to avoid recursive trap calls.
99-03-31  A bug in which a local variable in a function declared readonly
	  would generate an error when the function went out of
	  scope has been fixed.
99-03-31  A bug in which \<new_line> entered from the keyboard
	  with the KEYBD trap enabled has been fixed.
99-03-31  The error message for a misplaced ((, for example print ((3),
	  was often garbled and has been fixed.
99-03-31  A bug in the KEYBD trap in which escape sequences of the form
	  <ESC>[#~ were not being handled as a unit has been fixed.
99-03-31  A bug in which ksh would consider expressions like [[ (a) ]]
	  as syntax errors has been fixed.
99-03-31  A function defined as foo() without a function body
	  was not reported as a syntax error.
99-03-31  A bug in which ksh could run out of file descriptors when
	  a stream was repeatedly opened with exec and read from
	  has been fixed.

98-04-30  --- Release ksh93g  ---
98-04-30 +The pipefail option has been added.  With pipefail
	  enabled, a pipeline will not complete until all
	  commands are complete, and the return value will
	  be that of the last command to fail, or zero if
	  all complete successfully.
98-04-30 +The name-value pair library uses the cdt library rather
	  than the hash library.  This change should be transparent
	  to applications.
98-04-30 +On the U/WIN version for Window 95 and Windows NT,
          when a directory beginning with a letter followed by
          a colon is given to cd, it is assumed to be an absolute
          directory
98-04-30 +When an executable is found on a given path,
	  the appropriate library path variable is prepended
	  with a corresponding library directory.
98-04-30  A bug in which a name reference could be created to
	  itself and later cause the shell to get into an infinite
	  loop has been fixed.
98-04-30  A bug in shcomp relating to compound variables was fixed.
98-04-30  A bug introduced in ksh93e in which leading 0's in -Z
	  fields caused the value to be treated as octal for arithmetic
	  evaluation has been fixed.
98-04-30  A bug when a name reference with a shorter name than
          the variable it references was the subject of a compound
	  assignment has been fixed.
98-04-30  A bug which in which assignment to array variables in
	  a subshell could affect the parent shell has been
	  fixed.
98-04-30  read name?prompt was putting a 0 byte at the end of the
	  prompt on standard error.
98-04-30  A bug in [[ string1 > string2 ]] when ksh was run with -x
	  has been fixed.
98-04-30  A bug in which the escape character was not processed
	  correctly inside {...} when brace expansion is enabled
	  has been fixed, for example {\$foo}.
98-04-30  A bug in line continuation in here-documents has been
	  fixed.
98-04-30  The default base when not specified with typeset -i is
	  10 in accordance with the documentation.  Previously,
	  the value was determined by the first assignment.
98-04-30  A parsing bug in which a # preceded alphanumeric
	  characters inside a command substitution caused
	  a syntax error to be reported has been fixed.
98-04-30  A bug in which a decimal constant represented as 10#ddd
	  where ddd was more than five digits generated a syntax
	  error has been fixed.
98-04-30  A bug in here document expansion in which ${...} expansions
	  were split across buffer boundaries has been fixed.
98-04-30 +The sh_fun() function now takes third argument which
	  is an argument list for the invoked discipline function
	  or built-in.
98-04-30 +A callback function can be installed which will give
          notification of file duplications and file closes.
98-04-30  When ksh is compiled on systems that do not use fork()
	  current option settings where not propagated to subshells.

97-06-30  --- Release ksh93f  ---
97-06-30 +Hostnames in addition to host addresses can be given in
	  /dev/tcp/host/port virtual file names.
97-06-30  File name completion and expansion now quotes special
	  characters in file names from both emacs and vi edit modes.
97-06-30  An empty for list behave like a for list with null expansions.
	  It produces a warning message with sh -n.
97-06-30 +The code has been modified to work with EBCDIC as well as ASCII.
97-06-30  A bug which would cause the secondary prompt to be
	  displayed when a user entered a literal carriage
	  return has been fixed.
97-06-30  A bug which caused ksh read -s name to core dump was
	  fixed.
97-06-30  A bug with the expansion of \} and \] inside double
	  quoted strings that also contained variable expansions
	  has been fixed
97-06-30  Changes in the ksh93e point release caused autoload
	  functions invoked from within command substitution
	  to fail.  This has been fixed.
97-06-30  A bug in the processing of here-documents that could
	  prevent variable substitution to occur after $(...) command
	  substitution for long here documents has been fixed.
97-06-30  A bug caused by a race condition that could cause SIGTERM
	  to be ignored by a child process has been fixed.
97-06-30  A bug which prevented the startup of a coprocess immediately
	  after killing a running coprocess has been fixed.
97-06-30  ulimit foobar, where foobar is not an arithmetic
	  expression, now gives an error message as it did with ksh88
	  instead of setting the file size limit to 0.
97-06-30  A bug which could cause an interactive shell to terminate when
	  the last process of a pipeline was a POSIX function was fixed.
97-06-30  A bug which could cause command substitution of a shell script
	  to core dump has been fixed.
97-06-30  A security hole was fixed in suid_exec.
97-06-30  Arithmetic functions such as pow() that take more than
	  one argument, did not work if arguments other than the
	  first contained parenthesized sub-expression.
97-06-30  The error message from a script containing an incomplete
	  arithmetic expression has been corrected.
97-06-30  A bug which caused a core dump on some machines when
	  the value of a name reference contained a positional
	  parameter and the name reference was not defined inside
	  a function has been fixed.
97-06-30  Arithmetic expressions now correctly handle hexadecimal
	  constants.
97-06-30  A bug in which integer variables could be expanded
	  with a leading 10# when declared with typeset -i
	  multiple times has been corrected.
97-06-30  A bug in which IFS wasn't correctly restored when
	  set within command substitution has been fixed.
97-06-30  The _ character is now considered as part of a word
	  with the M-f and M-b emacs directives as it was in ksh88.
97-06-30  A bug in brace pattern expansions that caused expressions
          such as {foo\,bar,bam} to expand incorrectly have been fixed.


96-07-31  --- Release ksh93e  ---
96-07-31 +The math functions, atan2, hypot, fmod, and pow were added.
96-07-31 +When a shared library is loaded, if the function lib_init()
	  is defined in the library, it is invoked the first time that
	  the library is loaded with builtin -f library.
96-07-31  The k-shell information abstraction database option, KIA,
          has been revamped.
96-07-31  Empty command substitutions of the form $() now work.
	  whence -v foo now gives the correct result after calling
	  builtin -d foo.
96-07-31  A bug in right to left arithmetic assignment for which
	  the arithmetic expression (( y = x = 1.5 )) did not
	  yield 1 for y when x was declared typeset -i was fixed.
96-07-31  printf has been fixed to handle format containing \0
	  and/or \0145 correctly.  In addition, characters following
	  %b in the format string are no longer displayed when
	  the operand contains \c.
96-07-31  A bug in printf that could cause the %E format to
	  produce unnormalized results has been fixed.
96-07-31  A bug which causes some arithmetic expressions to be
	  incorrectly evaluated as integer expressions rather
	  than floating point has been fixed.
96-07-31  Functions defined inside a subshell no longer remain
	  defined when the subshell completes.
96-07-31  The error message from sh -c ';echo foo' has been
	  corrected.
96-07-31  The format for umask -S has been changed to agree
	  with the specification in the POSIX standard.
96-07-31  A bug that caused side effects in subscript evaluation
	  when tracing was enabled for subscripts using ++ or --
	  has been fixed.
96-07-31  To conform to the POSIX standard getopts has been changed
	  so that the option char is set to ? when it returns with
	  a non-zero exit status.
96-07-31  The handling of \} inside ${name...} has been fixed so
	  that the \ quotes the }.
96-07-31  A bug that caused the read builtin to resume execution
	  after processing a trap has been fixed.
96-07-31  [[ -s file ]] has been fixed so that if file is open
	  by ksh, it is flushed first.
96-07-31  In some cases attributes and sizes for non exported
	  variables weren't being reset before running a script.
96-07-31  The value of TMOUT was affected by changes make to
	  it in a subshell.
96-07-31  The jobs command did not reflect changes make by
	  sending the CONT signal to a command.
96-07-31  The error message for ksh -o unknown was incorrect.
96-07-31  Functions invoked as name=value name, did not use
	  values from the calling scope when evaluating value.
96-07-31  A bug in which the shell would re-execute previously
	  executed code when a shell script or coprocess was
	  run in the background has been fixed.
96-07-31  A bug in which an empty here-document would leave
	  a file descriptor open has been fixed.
96-07-31  A bug in which $(set -A array ...) would leave a
	  side effect has been fixed.
96-07-31  A discipline function for a global variable defined
	  within a function defined with the function keyword,
	  incorrectly created a local variable of the same name
	  and applied the discipline to it.

95-08-28  --- Release ksh93d  ---
95-08-28  The \ character was not handled correctly in replacement
	  patterns with ${x/pattern/replace}.
95-08-28  A bug with read in which the line did not end with
	  a new-line has been fixed.
95-08-28  A bug in file name generation which sometimes
	  appended a . for filenames that ended in / has
	  been fixed.
95-08-28 +If a process is waited for after a status has
	  been returned by a previous wait, wait now
	  returns 127.
95-08-28  A bug with hist (fc) -e which prevented a command
	  to re-executed after it had been edited has been fixed.
95-08-28  A bug which prevented quoting from removing the meaning
	  of unary test operators has been fixed.
95-08-28  A bug with typeahead and KEYBOARD traps with the
          MULTIBYTE option set has been fixed.
95-08-28 +Builtin functions can take a third argument which is
          a void*.
95-08-28  The nv_scan() function can restrict the scope of a walk
          to the top scope.

95-04-31  --- Release ksh93c  ---
95-04-31  The expansion of "$@" was incorrect when $1 was the null
	  string.
95-04-31  A bug which could incorrectly report a syntax error in
	  a backquoted expression when a $ was preceded by \\
	  has been fixed.
95-04-31  A bug which prevented the shell from exiting after
	  reporting an error when failing to open a script
	  has been fixed.
95-04-31  A bug that could lead to memory corruption when a
	  large here document that required parameter or command
	  substitution was expanded has been fixed.
95-04-31  A bug that could cause a core dump on some systems
	  after ksh detected an error when reading a function
	  has been fixed.
95-04-31  A bug which could cause a coprocess to hang when
	  reading from a process that has terminated has been fixed.
95-04-31  A bug which caused a script to terminate when set -e
	  was on and the first command of and && or || list
	  failed has been fixed.
95-04-31  A bug with here documents inside $(...) when the delimiter
	  word is an identifier has been fixed.
95-04-31  A bug which caused $0 to display the wrong value when
	  a script was invoked as an argument to the . command
	  and the eval command has been fixed.
95-04-31  A bug that could cause the built-in sleep to hang
	  has been fixed.
95-04-31  A bug introduces in 12/28/93b which caused the backslash
	  to be removed when it was followed by digit inside double
	  quotes in some instances has been fixed.
95-04-31  A bug which could cause a core dump if ksh was invoked with
	  standard input closed has been fixed.
95-04-31  A bug which could cause a core dump if typeset -A was
	  specified for an existing variable has been fixed.
95-04-31  Variables that were unset but had attributes such as readonly
	  and export were not listed with readonly, export and typeset.
95-04-31  Several problems with signals have been fixed.
95-04-31  A bug which prevented ulimit -t from working has been fixed.
	  Also, a bug in which failed ulimits could cause a core dump
	  has also been fixed.
95-04-31  A bug in expansion of the form ${name/#pattern/string} and
	  ${name/%pattern/string} has been fixed.
95-04-31  A bug which caused read -r on a line that contained only
	  blanks to get a non-null value has been fixed.
95-04-31  A bug introduced in the 'a' point release in which
	  ${x='\\'} expanded to \ when x was unset has been fixed.
95-04-31  A bug which prevented a trap on EXIT from being executed
	  when the last command in a script was a function invocation
	  has been fixed.
95-04-31  A bug which caused an interactive shell ignore input when
	  standard error was redirected to a file with exec,
	  and then restored with exec 2>&1 has been fixed.
95-04-31  An interactive shell turns on monitor mode even when
	  standard error has been redirected to a file.
95-04-31  A bug which could cause standard input to be incorrectly
	  positioned for the last command of a script has been fixed.
95-04-31  A bug in the edit modes which allowed walking back in
	  the history file for more than HISTSIZE commands has
	  been fixed.
95-04-31  A bug which could cause a core dump if variable TMPDIR was
	  changed between two command substitutions has been fixed.
95-04-31. A bug which prevented a trap on EXIT from being cleared
	  has been fixed.
95-04-31  A bug fixed for the v directive in vi MULTIBYTE has been
          fixed.
95-04-31  Code to for IFS handling of multibyte characters has
          been added.
95-04-31  The displaying of multibyte strings in export, readonly,
          typeset, and execution traces has been fixed.
95-04-31  Variables inside functions are now statically scoped.
	  The previous behavior was never documented.
95-04-31  Variables inside functions are now statically scoped.
          The previous behavior was never documented.
95-04-31  A few changes have been made to the name-value library
          that affect built-ins that use disciplines.  The
          changes allow disciplines to be shared by variables
          and should make it possible to add new disciplines
          without recompilation.
95-04-31 +The name-value library interface has undergone significant
          change for this revision.  See the new nval.3 man page.

94-12-31  --- Release ksh93b  ---
94-12-31 +Variables inside functions are now statically scoped.
          The previous behavior was never documented.
94-12-31 +If IFS contains two consecutive identical characters belonging
	  to the [:space:] class, then this character is treated as
	  a non-space delimiter so that each instance will delimit
	  a field.  For example, IFS=$'\t\t' will cause two consecutive
	  tabs to delimit a null field.
94-12-31 +The getopts command has a -a name option that specifies a
	  name that will be used for usage messages.
94-12-31  A bug which caused unset RANDOM to dump core has been
	  fixed.
94-12-31  A bug which prevented return for terminating a profile
	  or ENV file has been fixed.
94-12-31  A bug which prevented standard input from being
	  directed to /dev/null for background jobs when
	  monitor mode was turned off has been fixed.
94-12-31  Statements of the form typeset -options var[expr]=value
	  did not perform substitutions on expr as expected.
94-12-31  A bug which prevented the shell from sending a HUP
	  signal to some background jobs that were not disowned
	  has been fixed.
94-12-31  A bug which allowed a script to trap signals that are
	  ignored at the time that the shell was invoked by exec
	  has been fixed.
94-12-31  A bug which could cause a core dump when a discipline
	  function was unset within a discipline was fixed.
94-12-31  The typeset builtin now accepts a first argument of
	 + or - for compatibility with ksh88.
94-12-31  For compatibility with ksh88, the results of expansions
	  of command arguments will treat the extended character
	  match characters ()|& as ordinary characters.
94-12-31  A bug which caused read to fail on a file that was
	  open for read/write with <> when the first operation
	  was print or printf has been fixed.
94-12-31  When a job is suspended, it is put on the top of
	  the job list as required by the POSIX standard.
94-12-31  The value of OPTARG when an option that required
	  an argument but didn't have one was incorrect in the
	  case the option string began with a :.
94-12-31  A bug which caused the terminal to get into a bad
	  state with some KEYBD traps in vi-mode has been fixed.
94-12-31  A bug which caused an invalid trap to cause a script
	  to terminate, rather than just return an error, has
	  been fixed.
94-12-31  Backreferencing sub-expressions in patterns and replacement
	  strings now works.
94-12-31  A bug in chmod which caused the -R option to fail has
	  been fixed.
94-12-31 +More signal names have been added for Solaris

94-06-30  --- Release ksh93a  ---
94-06-30  An expansion bug which causes portions of a word after
	  a $((...)) expansion that contains a nested $var expansion
	  to be lost has been fixed.
94-06-30  A bug that caused a core dump when a script that did not
	  have PWD set and did a cd inside command substitution
	  has been fixed.
94-06-30  A bug which caused a core dump on some machines when
	  the LANG variable was assigned to has been fixed.
94-06-30  A bug which incorrectly handled set disciplines that
	  performed arithmetic evaluation when the discipline
	  was called from the arithmetic evaluator has been fixed.
94-06-30  A bug caused by an EXIT trap inside a function that
	  was executed in a subshell was fixed.
94-06-30  If foo is a function, and not a program, then command foo
	  now reports that foo isn't found rather than invoking foo.
94-06-30  The previous version incorrectly listed -A as an
	  invocation option.  The -A option is only for set.
94-06-30  A bug was fixed which caused ksh to loop when execution trace
	  was enabled and the PS4 prompt required command substitution.
94-06-30  A bug which could cause the job control switch character
	  to be disabled when a script that enabled monitor mode
	  terminated was fixed.
94-06-30  A bug in the macro expansion global replacement operator //,
	  when the pattern began with a [ or +( has been fixed.
94-06-30  A bug which prevented ~ expansion from occurring when
	  it was terminated with a colon inside an assignment
	  has been fixed.
94-06-30  A bug in the dot command which prevented autoload functions
	  from working has been fixed.
94-06-30  A bug which caused a variable to be unset if the
	  its value were expanded inside a set discipline has
	  been fixed.
94-06-30  Whence -a now longer reports that a defined function
	  is undefined.
94-06-30  A bug on some systems in which $0 would be incorrect
	  in scripts invoked by name has been fixed.
94-06-30  Here documents with an empty body now work.
94-06-30  A bug which disabled argument passing and resetting
	  of options for a script invoked by name inside a
	  function has been fixed.
94-06-30  A bug in which an EXIT trap set the caller of a function
	  would be executed if a command called inside a function
	  was not found has been fixed.
94-06-30  A bug which allowed a script to trap signals that are
	  ignored at the time that the shell was invoked has
	  been fixed.
94-06-30  A bug which caused 2<&1- when applied to a shell built-in
	  to leave standard input closed has been fixed.
94-06-30  A bug which caused the shell to incorrectly parse
	  $() command substitutions with nested case statements
	  has been fixed.

