bug#46494: 28.0.50; [native-comp] Problems with async background compile

[Eli Zaretskii]

> Cc: 46494@debbugs.gnu.org
> Date: Sun, 14 Feb 2021 08:01:59 +0000
> From:  Andrea Corallo via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> > c) Quitting emacs when async compilation processes are running sometimes
> >    causes crashes in the compile processes, which show the emacs abort
> >    dialog (once for each async process). The dialogs disappear after a
> >    short delay (presumably due to the parent emacs having exited).
> 
> Mmmh, I guess this is a Windows specific behavior.  Is there a specific
> way to shut-down child processes we would use on Windows not to get
> this error?

Andrea, can you point me to the place where we interrupt async
compilations when Emacs exits?  Is that just a normal delete-process,
or do we do something else, like sending a signal?  Also, does the
Emacs subprocess invoked to perform async compilation spawn further
child processes, or is everything happening inside a single Emacs
process?

Armed with that knowledge, I will try to look at the code and figure
out why the compiling process crashes.

Thanks.