bug#17771: 24.3.91; SIGSEGV in cleanup_vector

[Eli Zaretskii <eliz@gnu.org>]

> From: Stephen Berman <stephen.berman@gmx.net>
> Cc: 17771@debbugs.gnu.org
> Date: Fri, 13 Jun 2014 11:50:59 +0200
> 
> On Fri, 13 Jun 2014 12:41:56 +0300 Eli Zaretskii <eliz@gnu.org> wrote:
> 
> >> From: Stephen Berman <stephen.berman@gmx.net>
> >> Date: Fri, 13 Jun 2014 11:12:44 +0200
> >> 
> >> 
> >> 0. emacs -Q
> >> 1. C-h h (on my machine, it takes ~30 seconds for the Hello file to
> >>    appear; during that time, do the following:)
> >> 2. Type C-g repeatedly (I did it rapidly, for ~15 seconds).
> >> 3. Emacs crashes, full backtrace below.  (This is reliably reproducible.)
> >
> > Not here, but this is Windows, where input is treated very
> > differently.
> >
> >> Program received signal SIGSEGV, Segmentation fault.
> >> 0x00000000005aa564 in cleanup_vector (vector=0x43b4ea8)
> >>     at ../../../../bzr/emacs/emacs-24/src/alloc.c:2929
> >> 2929          ((struct font *) vector)->driver->close ((struct font *) vector);
> >
> > So which one is the bad pointer, vector, vector->driver, or
> > vector->driver->close?
> 
> If you're asking me, can you tell me what to type in gdb to find out?

 (gdb) p vector
 (gdb) p vector->driver
 (gdb) p vector->driver->close

Thanks.