[Bug 194823] "bsdgrep -E { /dev/null" core dumps

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194823

--- Comment #5 from Dimitry Andric <dim at FreeBSD.org> ---
(In reply to Ed Maste from comment #4)
> (In reply to Dimitry Andric from comment #3)
> 
> As ngie reports in PR 191086 the Apple grep source is now here:
> https://opensource.apple.com/source/text_cmds/text_cmds-97/grep/

IIRC I had seen that before, and there are two notable issues:
* Apple seem to have imported a version from CVS, e.g. their grep.c has:
__FBSDID("$FreeBSD: src/usr.bin/grep/grep.c,v 1.16 2012/01/15 17:01:28 eadler
Exp $");
* Apple does not use our usr.bin/grep/regex, but their own regex library, for
which I do not know the origin.

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