bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: michael.albinus@gmx.de,  ncaprisunfan@gmail.com,  49261@debbugs.gnu.org
> Date: Thu, 08 Jul 2021 00:22:15 +0200
> 
> Lars Ingebrigtsen <larsi@gnus.org> writes:
> 
> > I rewound back to checkout 90c89e8bdeca61aceae79e4c60a9a51800574914, and
> > then said
> >
> > make bootstrap; touch lisp/*.el; make
> >
> > and that segfaults.  So this build failure doesn't seem to be related to
> > the locking changes.  *phew* So I'm bisecting now back to the offending
> > commit.
> 
> OK, I give up -- I rewound back to October 2020, and it still displays
> this behaviour.  I'm guessing the problem arrived on master from a
> branch that was merged, but I'm not proficient enough in git to poke
> through that stuff.

Is this only on macOS?  If not, on which systems do you see this
crash?