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with -1.
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some that we had already fixed locally.
o typeset -f FUNC doesn't print follows command (and expression) substitutions.
o when re-allocating memory, too much may be copied from old memory.
o set -o printed some options sans names.
o emacs mode: <esc>. in very fist command causes core dump.
o pdksh dumps core after a cd command.
o typeset -i reports on array elements that have no value
(at&t ksh reports on array base name - no index).
o ulimit -ctn unlimittttted kills shell (resource exceeded).
o ". /dev/null" says access denied.
o flag field in aliases incorrectly changed (all flags set instead of
clearing ISSET) in exec.c(flushcom).
o ${#array[*]} prints largest index instead of number of (set) elements
in an array (ksh88 does the former).
o sys_siglist[] doesn't always have NSIG non-null entries...
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can set it in their environment.
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eliminate it from sh.
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don't set $_ if we're non-interactive.
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this way it is clearer where it comes from (pdksh is ksh in OpenBSD)
and it's more consistent with other shells (bash - .bash_history and i
think FreeBSD's sh also used something like .sh_history)
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