bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs

[Eli Zaretskii]

> From: Michael Welsh Duggan <mwd@md5i.com>
> Cc: 47244@debbugs.gnu.org
> Date: Thu, 18 Mar 2021 12:27:13 -0400
> 
> (gdb) p current_buffer->text->beg
> $7 = (unsigned char *) 0x0

That explains the crash.  What does this display:

  (gdb) source /path/to/emacs/src/.gdbinit
  (gdb) p current_buffer->name_
  (gdb) xstring

And, given the name of the buffer this will display, what can you tell
about that buffer?