Re: Crash in handling tar files (Was: GDB debugger mode for Emacs in ELPA)

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 1 Jul 2008 15:37:38 +0530 (IST)
> From: filerz-emacs@yahoo.com
> Cc: emacs-devel@gnu.org
> 
> > From: Eli Zaretskii <eliz@gnu.org>
> > > (gdb) bt
> > > #0  0x0119eaf3 in re_search_2 (bufp=0x1376420, str1=0x388a160 "ostfix 
> > modifiers\"\n \"quail/latin-alt\")\n(register-input-method\n 
> > \"latin-3-alt-postfix\" \"Latin-3\" 'quail-use-package\n \"3<\" \"Latin-3 char
> > 
> > This is strange text!  What is your value of auto-coding-regexp-alist?
> 
> (("^BABYL OPTIONS:[     ]*-\\*-[     ]*rmail[     ]*-\\*-" . no-conversion) ("\\`þÿ" . utf-16be-with-signature) ("\\`ÿþ" . utf-16le-with-signature) ("\\`" . utf-8) ("\\`;ELC
> 
> I am running 'emacs -q --no-site-file' on WXP built with MinGW and see the above value
> 
> > Do you have any idea why auto-coding-regexp-alist-lookup ended up
> > looking at the string pointed to by str1 above?
> 
> Not a clue!

In that case, my guess is that this is the result of some memory
mess-up, perhaps a GC with un-GCPRO'ed variables.  That could explain
the strange text we see in regex search initiated by
auto-coding-regexp-alist-lookup, since GC could relocate strings.

Unfortunately, I will be traveling for 3 weeks starting tomorrow, so I
probably won't have time to debug this.  Maybe someone beats me to it;
if not, I hope to look into this in 3 weeks time.