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From: Eli Zaretskii <e...@gnu.org>
Newsgroups: gnu.emacs.bug
Subject: bug#12579: Emacs 24.1 / 24.2 daily crashes
Date: Sat, 06 Oct 2012 14:51:56 +0200
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> From: "Fabrice Niessen" <f...@missioncriticalit.com>
> Cc: 12...@debbugs.gnu.org
> Date: Sat, 06 Oct 2012 13:26:26 +0200
> 
> Attaching to process 5928
> [New Thread 5928.0x1904]
> [New Thread 5928.0x1c7c]
> [New Thread 5928.0x1644]
> [New Thread 5928.0x28c]
> Reading symbols from /cygdrive/c/Program Files/Emacs-24.2/bin/emacs.exe...done.
> warning: File "/cygdrive/c/Program Files/Emacs-24.2/.gdbinit" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load".
> (gdb) thread apply all backtrace

Since this _is_ a crash, you _must_ type "continue", wait for another
GDB prompt, and only then type "thread apply all backtrace".
Otherwise, you get a backtrace that is not useful.  Like this one:

> Thread 4 (Thread 5928.0x28c):
> #0  0x7c91120f in ntdll!DbgUiConnectToDbg () from /cygdrive/c/WINDOWS/system32/ntdll.dll
> #1  0x7c962119 in ntdll!KiIntSystemCall () from /cygdrive/c/WINDOWS/system32/ntdll.dll
> #2  0x00000005 in ?? ()
> #3  0x00000004 in ?? ()
> #4  0x00000001 in ?? ()
> #5  0x7132ffd0 in ?? ()
> #6  0x00000000 in ?? ()
> 
> Thread 3 (Thread 5928.0x1644):
> #0  0x7c91e514 in ntdll!LdrAccessResource () from /cygdrive/c/WINDOWS/system32/ntdll.dll
> #1  0x7c91df5a in ntdll!ZwWaitForSingleObject () from /cygdrive/c/WINDOWS/system32/ntdll.dll
> #2  0x7c8025db in WaitForSingleObjectEx () from /cygdrive/c/WINDOWS/system32/kernel32.dll
> #3  0x00000658 in ?? ()
> #4  0x00000000 in ?? ()
> 
> Thread 2 (Thread 5928.0x1c7c):
> #0  0x7c91e514 in ntdll!LdrAccessResource () from /cygdrive/c/WINDOWS/system32/ntdll.dll
> #1  0x7e3991be in USER32!GetProcessWindowStation () from /cygdrive/c/WINDOWS/system32/USER32.dll
> #2  0x7e3991f1 in USER32!GetMessageW () from /cygdrive/c/WINDOWS/system32/USER32.dll
> #3  0x011490bd in w32_msg_pump (msg_buf=0x7236ff54) at w32fns.c:2263
> #4  0x011492fb in w32_msg_worker@4 (arg=0x0) at w32fns.c:2485
> #5  0x7c80b729 in KERNEL32!GetModuleFileNameA () from /cygdrive/c/WINDOWS/system32/kernel32.dll
> #6  0x00000000 in ?? ()
> 
> Thread 1 (Thread 5928.0x1904):
> #0  0x7c91e514 in ntdll!LdrAccessResource () from /cygdrive/c/WINDOWS/system32/ntdll.dll
> #1  0x7c91df4a in ntdll!ZwWaitForMultipleObjects () from /cygdrive/c/WINDOWS/system32/ntdll.dll
> #2  0x7c8648a2 in UnhandledExceptionFilter () from /cygdrive/c/WINDOWS/system32/kernel32.dll
> #3  0x00000002 in ?? ()
> #4  0x007b7f4c in ?? ()
> #5  0x7c8438fa in ValidateLocale () from /cygdrive/c/WINDOWS/system32/kernel32.dll
> #6  0x00000000 in ?? ()

Thread 1 is the interesting thread, but this backtrace just shows that
it is in an exception handler, which is not useful.