GNU bug report logs - #16264
GC crash

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Package: emacs; Reported by: Juanma Barranquero <lekktu@HIDDEN>; dated Fri, 27 Dec 2013 03:08:02 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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Date: Fri, 27 Dec 2013 13:13:37 +0200
From: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#16264: GC crash
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> From: Juanma Barranquero <lekktu@HIDDEN>
> Date: Fri, 27 Dec 2013 11:13:57 +0100
> Cc: 16264 <at> debbugs.gnu.org
> 
> This happened when Emacs wasn't being run from GDB, and after gdb -p

Yes, I know.  If you were running Emacs from GDB, the original
exception would have been caught by GDB and reported with the full
backtrace, before _gnu_exception_handler is called.  Exception
handling on Windows is sensitive to whether the program is being
debugged or not.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#16264; Package emacs. Full text available.

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From: Juanma Barranquero <lekktu@HIDDEN>
Date: Fri, 27 Dec 2013 11:13:57 +0100
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Subject: Re: bug#16264: GC crash
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On Fri, Dec 27, 2013 at 9:12 AM, Eli Zaretskii <eliz@HIDDEN> wrote:

> Do you have the exception data printed by this code fragment in
> emacs_abort:

Alas, no.

> If not, please next time examine these 2 variables, or let Emacs
> continue from the abort, so it itself outputs the information.

This happened when Emacs wasn't being run from GDB, and after gdb -p
PID and "continue", that information didn't show.

> This
> is especially important when the backtrace shown by GDB doesn't show
> anything useful above _gnu_exception_handler, because except_addr will
> tell us which code caused the exception, and what exception was that
> (Windows maps quite a few of them to SIGSEGV).

Will try to get it next time.

    J




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#16264; Package emacs. Full text available.

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From: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#16264: GC crash
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> From: Juanma Barranquero <lekktu@HIDDEN>
> Date: Fri, 27 Dec 2013 04:06:44 +0100
> 
> Program received signal SIGTRAP, Trace/breakpoint trap.
> [Switching to Thread 9596.0x2988]
> 0x76b5321a in KERNELBASE!DeleteAce () from C:\Windows\syswow64\KernelBase.dll
> (gdb) bt
> #0  0x76b5321a in KERNELBASE!DeleteAce () from
> C:\Windows\syswow64\KernelBase.dll
> #1  0x011fb2d2 in emacs_abort () at w32fns.c:8415
> #2  0x010efd62 in terminate_due_to_signal (sig=11, backtrace_limit=40)
> at emacs.c:378
> #3  0x01114354 in handle_fatal_signal (sig=11) at sysdep.c:1628
> #4  0x0111432f in deliver_thread_signal (sig=11, handler=0x111433b
> <handle_fatal_signal>) at sysdep.c:1602
> #5  0x01114388 in deliver_fatal_thread_signal (sig=11) at sysdep.c:1640
> #6  0x010011ea in _gnu_exception_handler@4 ()
> #7  0x011fb1fa in my_exception_handler (exception_data=0x88a388) at
> w32fns.c:8365
> #8  0x7698fffb in KERNEL32!GetQueuedCompletionStatus () from
> C:\Windows\syswow64\kernel32.dll
> #9  0x0088a388 in ?? ()
> #10 0x779074ff in ntdll!AlpcMaxAllowedMessageLength () from
> C:\Windows\SysWOW64\ntdll.dll
> #11 0x0088a388 in ?? ()
> #12 0x778c9f45 in ntdll!RtlpNtSetValueKey () from C:\Windows\SysWOW64\ntdll.dll
> #13 0x011be1bd in sprintf (__stream=0x0, __format=0x0) at
> c:/bin/mingw/bin/../lib/gcc/mingw32/4.7.2/../../../../include/stdio.h:269
> #14 0x7efde000 in ?? ()
> #15 0x00000000 in ?? ()
> 
> Lisp Backtrace:
> "Automatic GC" (0x1536dfc)
> "put-text-property" (0x88aaf8)
> "font-lock-prepend-text-property" (0x88ae40)
> 0x51e1bc0 PVEC_COMPILED
> "mapcar" (0x88b2f8)
> "completion-hilit-commonality" (0x88b650)
> "completion-basic-all-completions" (0x88b97c)
> 0x56ca708 PVEC_COMPILED
> 0x56caf50 PVEC_COMPILED
> "funcall" (0x88bfe0)
> "completion--some" (0x88c4e0)
> "completion--nth-completion" (0x88c83c)
> "completion-all-completions" (0x88cb90)
> "completion-all-sorted-completions" (0x88cee8)
> "icomplete-completions" (0x88d228)
> "byte-code" (0x88d4c0)
> "byte-code" (0x88d830)
> "icomplete-exhibit" (0x88dca8)
> "icomplete-minibuffer-setup" (0x88e05c)
> "read-from-minibuffer" (0x88e280)
> "completing-read-default" (0x88e5c0)
> "completing-read" (0x88e6d4)
> "byte-code" (0x88e980)
> "call-interactively" (0x88ec84)
> "electric-helpify" (0x88efc8)
> "electric-describe-function" (0x88f314)
> "call-interactively" (0x88f520)
> "command-execute" (0x88f85c)
> (gdb)

Do you have the exception data printed by this code fragment in
emacs_abort:

	    if (except_addr)
	      sprintf (buf, "\r\nException 0x%lx at this address:\r\n%p\r\n",
		       except_code, except_addr);

If not, please next time examine these 2 variables, or let Emacs
continue from the abort, so it itself outputs the information.  This
is especially important when the backtrace shown by GDB doesn't show
anything useful above _gnu_exception_handler, because except_addr will
tell us which code caused the exception, and what exception was that
(Windows maps quite a few of them to SIGSEGV).

Thanks.




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#16264; Package emacs. Full text available.

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From: Juanma Barranquero <lekktu@HIDDEN>
Date: Fri, 27 Dec 2013 04:06:44 +0100
Message-ID: <CAAeL0STYNWOoWu2fpSBzBpoGMi6zteyLbhpdWOfMWR3r0duGYw@HIDDEN>
Subject: GC crash
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Package: emacs
Version: 24.3.50


Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 9596.0x2988]
0x76b5321a in KERNELBASE!DeleteAce () from C:\Windows\syswow64\KernelBase.dll
(gdb) bt
#0  0x76b5321a in KERNELBASE!DeleteAce () from
C:\Windows\syswow64\KernelBase.dll
#1  0x011fb2d2 in emacs_abort () at w32fns.c:8415
#2  0x010efd62 in terminate_due_to_signal (sig=11, backtrace_limit=40)
at emacs.c:378
#3  0x01114354 in handle_fatal_signal (sig=11) at sysdep.c:1628
#4  0x0111432f in deliver_thread_signal (sig=11, handler=0x111433b
<handle_fatal_signal>) at sysdep.c:1602
#5  0x01114388 in deliver_fatal_thread_signal (sig=11) at sysdep.c:1640
#6  0x010011ea in _gnu_exception_handler@4 ()
#7  0x011fb1fa in my_exception_handler (exception_data=0x88a388) at
w32fns.c:8365
#8  0x7698fffb in KERNEL32!GetQueuedCompletionStatus () from
C:\Windows\syswow64\kernel32.dll
#9  0x0088a388 in ?? ()
#10 0x779074ff in ntdll!AlpcMaxAllowedMessageLength () from
C:\Windows\SysWOW64\ntdll.dll
#11 0x0088a388 in ?? ()
#12 0x778c9f45 in ntdll!RtlpNtSetValueKey () from C:\Windows\SysWOW64\ntdll.dll
#13 0x011be1bd in sprintf (__stream=0x0, __format=0x0) at
c:/bin/mingw/bin/../lib/gcc/mingw32/4.7.2/../../../../include/stdio.h:269
#14 0x7efde000 in ?? ()
#15 0x00000000 in ?? ()

Lisp Backtrace:
"Automatic GC" (0x1536dfc)
"put-text-property" (0x88aaf8)
"font-lock-prepend-text-property" (0x88ae40)
0x51e1bc0 PVEC_COMPILED
"mapcar" (0x88b2f8)
"completion-hilit-commonality" (0x88b650)
"completion-basic-all-completions" (0x88b97c)
0x56ca708 PVEC_COMPILED
0x56caf50 PVEC_COMPILED
"funcall" (0x88bfe0)
"completion--some" (0x88c4e0)
"completion--nth-completion" (0x88c83c)
"completion-all-completions" (0x88cb90)
"completion-all-sorted-completions" (0x88cee8)
"icomplete-completions" (0x88d228)
"byte-code" (0x88d4c0)
"byte-code" (0x88d830)
"icomplete-exhibit" (0x88dca8)
"icomplete-minibuffer-setup" (0x88e05c)
"read-from-minibuffer" (0x88e280)
"completing-read-default" (0x88e5c0)
"completing-read" (0x88e6d4)
"byte-code" (0x88e980)
"call-interactively" (0x88ec84)
"electric-helpify" (0x88efc8)
"electric-describe-function" (0x88f314)
"call-interactively" (0x88f520)
"command-execute" (0x88f85c)
(gdb)




Acknowledgement sent to Juanma Barranquero <lekktu@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#16264; Package emacs. Full text available.
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Last modified: Fri, 31 Oct 2014 17:00:04 UTC

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Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.