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From: "KARR, DAVID" <dk068x AT att DOT com>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: RE: Fatal error from Cygwin emacs-w32 every day or so
Date: Sun, 20 Apr 2014 01:19:24 +0000
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> -----Original Message-----
> Of Ken Brown
> Sent: Saturday, April 19, 2014 4:38 PM
> Subject: Re: Fatal error from Cygwin emacs-w32 every day or so
> 
> On 4/15/2014 12:13 PM, Ken Brown wrote:
> > On 4/15/2014 12:12 AM, Eli Zaretskii wrote:
> >>> Date: Mon, 14 Apr 2014 21:08:15 -0700
> >>> From: Ken Brown
> >>>
> >>>> I just saw it die, and this is the bt I get:
> >>>>
> >>>> Program received signal SIGSEGV, Segmentation fault.
> >>>> 0x0000000100551354 in wait_reading_process_output (
> >>>>       time_limit=time_limit AT entry=0, nsecs=nsecs AT entry=0,
> >>>>       read_kbd=read_kbd AT entry=-1, do_display=do_display AT entry=true,
> >>>>       wait_for_cell=wait_for_cell AT entry=4304630834,
> >>>>       wait_proc=wait_proc AT entry=0x0,
> >>>> just_wait_proc=just_wait_proc AT entry=0)
> >>>>      @/usr/src/debug/emacs-24.3-7/src/process.c:4677
> >>>> 4677                      if (wait_proc->gnutls_p /* Check for valid
> >>>> process.  */
> >>>
> >>> This backtrace doesn't make sense.  If you look at the source code,
> >>> you'll see that if wait_proc is NULL on entry to
> >>> wait_reading_process_output, then line 4677 is never reached.  I'm not
> >>> sure what would cause a bogus backtrace like this.  BLODA?
> >>> Optimization?
> >>>
> >>> In any case, I suggest that you wait a week until I have a chance to
> >>> build a pretest of 24.4 for you to try.  I'll build it without
> >>> optimization to make debugging easier.
> >>
> >> This is a known problem with GnuTLS support, it was solved in the
> >> Emacs repository last November (bzr revision 114956, if someone wants
> >> the diffs), and surely should be solved in the upcoming Emacs 24.4.
> >
> > Thanks, Eli!  In that case I'll make a new release of emacs-24.3 with
> > that patch applied, to see if it resolves the issue for the OP.
> 
> I've rebuilt emacs-24.3 with the gnutls fix.  David and Achim (and
> anyone else who's been experiencing these crashes), please try the
> following binary and let me know if it solves the problem:
> 
>     http://sanibeltranquility.com/cygwin/emacs-w32.exe.xz
> 
> You might have to do "chmod +x emacs-w32.exe" after uncompressing it.
> 
> If it fixes the problem, I'll issue a new release of emacs-24.3.  If
> not, I'll build a pretest of emacs-24.4 for you to try.

Ok.  It's running.  As it only fails after random intervals, I'll have to keep it running for a while.  I'll give it a day or so.

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