busybox/shell/ash_test/ash-vars/var_LINENO1.tests

env | grep ^LINENO
echo 2:$LINENO
echo 3:$LINENO >&2 \
| { sleep 0.1; echo 4:$LINENO; }
echo 5:$LINENO
test "$1" || . ./var_LINENO1.tests norepeat