bug#49261: 28.0.50; File Locking Breaks Presumptuous Toolchains

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: michael.albinus@gmx.de,  ncaprisunfan@gmail.com,  49261@debbugs.gnu.org
> Date: Thu, 08 Jul 2021 14:42:44 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Can you show the form being evaluated in frame #10?  Like this:
> >
> >   (gdb) fr 10
> >   (gdb) pp form
> 
> Hm:
> 
> (gdb) fr 10
> #10 0x0000555555706a59 in Feval (form=XIL(0x7ffff20f5023), 
>     lexical=<optimized out>) at eval.c:2343
> 2343    return unbind_to (count, eval_sub (form));
> (gdb) pp form
> #<INVALID_LISP_OBJECT 0x7ffff20f5023>

Which means unfortunately that to see the form one needs to display
the form piecemeal, one member at a time, using the xtype and the
other x* commands...  Let me know if you need more detailed
instructions.