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bug#17526: 24.3.90; Crash in Cygwin-w32 build


From: Ken Brown
Subject: bug#17526: 24.3.90; Crash in Cygwin-w32 build
Date: Mon, 19 May 2014 17:45:41 -0400
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0

On 5/19/2014 5:00 PM, Daniel Colascione wrote:
On 05/19/2014 12:39 PM, Eli Zaretskii wrote:
Date: Mon, 19 May 2014 15:19:24 -0400
From: Ken Brown <address@hidden>
CC: address@hidden

On 5/19/2014 11:18 AM, Eli Zaretskii wrote:
Date: Mon, 19 May 2014 08:30:49 -0400
From: Ken Brown <address@hidden>

I just got a crash with the following backtrace:

There goes my BLODA theory (assuming you don't have any). These crashes
(including the indirect-variable one) are all seemingly impossible, but
if there were generalized random memory corruption, I'd expect to see
more severe effects. I have no idea what's wrong. Both trunk and
emacs-24 seem to be affected: did something change in the Cygwin DLL side?

Not that I know of. By the way, all these crashes that are being reported are in 64-bit Cygwin, FWIW. So it may very well be a Cygwin problem rather than an emacs problem.

Do you have a 64-bit Cygwin installation on which you could try to reproduce this? The crashes are seemingly random. I've occasionally gotten a crash a few seconds after starting emacs, but other times I've run emacs for days without a problem. So you might have to wait a long time. Also, I don't always get a chance to attach gdb. In other words, emacs just dies with a SEGV, but apparently without calling emacs_abort.

Ken





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