bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal

[Po Lu]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

> In case it matters--I didn't mention that I actually used the change
> below, because w->next is a Lisp_Object in master.

I sent another reply to that message you should read.

w->next is struct window * in my branch, but in the ordinary garbage
collector mark_vectorlike should itself mark all fields between frame
and mode_line_help_echo.

So if that mechanism isn't working correctly, then we have a bigger
problem on hand.