bug#39962: 27.0.90; Crash in Emacs 27.0.90

[Eli Zaretskii]

> From: Pieter van Oostrum <pieter-l@vanoostrum.org>
> Cc: Eli Zaretskii <eliz@gnu.org>,  39962@debbugs.gnu.org,  eggert@cs.ucla.edu
> Date: Wed, 18 Mar 2020 00:32:42 +0100
> 
> >> >> 0x12590f3f0:    0x0000000000000006      0x0000000000000000
> >> >> 0x12590f400:    0x000000000d4269c0      0x0000000000000000
> >> >
> >> > I'm suspicious about this "symbol". Is 0xd4269c0 a valid lisp value?
> >>
> >> I'm sorry. I don't know how to find out. I'm just a newbee with debugging 
> >> elisp in gdb.
> >
> > I believe "xprintsym 0xd4269c0" would work on macOS, too. I'm not sure
> > whether "pp 0xd4269c0" would.
> 
> (gdb) xprintsym 0xd4269c0
> Invalid number "0xd4269c0.i".
> (gdb) pp 0xd4269c0
> Invalid cast.

Try

  (gdb) p XIL(0xd4269c0)
  (gdb) xsymbol