bug#15024: 24.3; Crash when editing pattern for Helm-for-files

[Eli Zaretskii]

> Date: Mon, 12 Aug 2013 14:45:20 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 15024@debbugs.gnu.org
> 
> > From: "Sebastien Vauban" <sva-news@mygooglest.com>
> > Cc: 15024@debbugs.gnu.org
> > Date: Mon, 12 Aug 2013 11:14:19 +0200
> > 
> > When displaying a PDF file (via DocView -- it worked), got this when killing
> > the buffer[1] IIRC:
> > 
> > --8<---------------cut here---------------start------------->8---
> > [Thread 11448.0x2c1c exited with code 0]
> > [New Thread 11448.0x2bc4]
> > gdb: Target exception EXCEPTION_BREAKPOINT at 0xe4311e00
> > 
> > Program received signal SIGTRAP, Trace/breakpoint trap.
> > [Switching to Thread 11448.0x2bc4]
> > 0x775c2d3c in ?? ()
> > (gdb) bt
> > #0  0x775c2d3c in ?? ()
> > (gdb)

One more thing: when the _real_ exception hits, please collect
backtrace from all the threads, like this:

  (gdb) thread apply all bt