bug#61896: 30.0.50; Emacs crashes because of an invalid free

[Eli Zaretskii]

> From: Philip Kaludercic <philipk@posteo.net>
> Date: Wed, 01 Mar 2023 20:25:11 +0000
> 
> Emacs just crashes out of nowhere, e.g. after I open a my init file.

It would help if you could run Emacs under GDB and show the backtrace
from one of those crashes, including the Lisp backtrace (the
"xbacktrace" command defined on src/.gdbinit).

> I have had this device for a while on a device of mine, that I couldn't
> reproduce on my main workstation or using emacs -Q.  Apparently this
> could be related to some faulty byte-code.
> 
> The best I could do to detect this issue was to build Emacs using
> -fsanitize=address and I managed to reprodce the issue reliably by
> invoking package-recompile-all.  I collected the following log:

Byte-code saw quite a bit of changes on master.  Adding Mattias in
case he has some ideas.