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Message-ID:	<51F3151D.7040000@cs.utoronto.ca>
Date:	Fri, 26 Jul 2013 20:32:29 -0400
From:	Ryan Johnson <ryan DOT johnson AT cs DOT utoronto DOT ca>
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To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	64-bit emacs crashes a lot

Hi all,

Running 64-bit cygwin 1.7.22(0.268/5/3), with emacs-nox 24.3-4 inside 
mintty 1.2-beta1-1, I keep getting seg faults and "Fatal error 6: Aborted"

The most recent stackdump was:
> Stack trace:
> Frame        Function    Args
> 0000021F960  0018006F893 (001008C3C40, 400000000FFF0000, 00180127C0D, 
> 00000229900)
> 00000000006  00180070D5A (00000000000, 00100000000, 000000001DC, 
> 00000000000)
> 0000021FB40  00180119F08 (006000670D0, 0000022D440, 0000021FC8C, 
> 00600067178)
> 000000000C1  00180116FBE (0000021FFD0, 00000000000, 00000000000, 
> 0010049F140)
> 00000000006  0018011748B (00000000000, 00000000000, 00000000000, 
> 00000000006)
> 00000000006  0018011765C (00000000000, 00000000000, 00000000000, 
> 00000000000)
> 00000000006  001801130CB (00000000000, 00000000000, 00000000000, 
> 00000000000)
> End of stack trace
... addr2line translates to:
> /usr/src/debug/cygwin-1.7.22-1/winsup/cygwin/exception.h:65
> /usr/src/debug/cygwin-1.7.22-1/winsup/cygwin/exceptions.cc:1453
> /usr/src/debug/cygwin-1.7.22-1/winsup/cygwin/sigproc.cc:678
> /usr/src/debug/cygwin-1.7.22-1/winsup/cygwin/signal.cc:248
> /usr/src/debug/cygwin-1.7.22-1/winsup/cygwin/pinfo.h:171
> /usr/src/debug/cygwin-1.7.22-1/winsup/cygwin/signal.cc:285

It happens at strange times, invariably during I/O of some kind (either 
keyboard input or output from some compilation window); I don't get the 
impression it's fork-related. I don't know how to get a backtrace from 
emacs, given the way any exception or signal always loses the "userland" 
stack (suggestions welcome).

Anyone else seeing this?

Ryan

(BTW, off topic a bit: emacs+gdb -mi integration is vastly improved 
since I last tried emacs-24, hooray!)


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