bug#28630: 27.0.50; C-g while a non-main thread is sitting crashes Emacs

[Alex]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Alex <agrambot@gmail.com>
>> Cc: eliz@gnu.org, Tom Tromey <tom@tromey.com>
>> Date: Sat, 30 Sep 2017 21:18:08 -0600
>> 
>> Should this be labelled a blocker for Emacs 26?
>
> Maybe I'm not sure.  It doesn't sound like threads are used much, if
> at all, which would make blocking on it silly.

It's understandable that bug 25214 isn't a blocker for this reason, but
I think crashing is severe enough to be a blocker, especially since it's
somewhat trivial to trigger.

>> Also, replacing (sit-for 2) with (read-char) or its family and hitting
>> C-g will also crash Emacs.
>
> Is your Emacs built with --enable-checking?  Because I get an
> assertion violation in that case, not a crash.

I just tried building with "./configure --enable-checking" and it still
crashes for me.