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

[Eli Zaretskii]

> From: Andy Moreton <andrewjmoreton@gmail.com>
> Date: Sat, 13 Feb 2021 16:58:11 +0000
> 
> 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).

Do the crashing processes run Emacs or do they run the compiler?  If
the former, can you attach GDB to them and show backtraces?