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

[Philip Kaludercic]

Mattias Engdegård <mattiase@acm.org> writes:

>> These checks do not audit the specpdl balance directly but that would be 
>> something to add if you don't make further progress.
>
> You could try this patch if you build with --enable-checking=all:

As I mentioned in my other response, I cannot reproduce the issue for
now.  Rah mentioned that he still has the files that caused the issue,
so perhaps he can help?