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Date:	Wed, 10 Jul 2013 17:54:55 -0400
From:	Ken Brown <kbrown AT cornell DOT edu>
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To:	cygwin AT cygwin DOT com
Subject:	Re: emacs problem
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On 7/10/2013 5:10 PM, Christopher Faylor wrote:
> On Wed, Jul 10, 2013 at 04:55:38PM -0400, Christopher Faylor wrote:
>> On Wed, Jul 10, 2013 at 02:54:59PM -0400, Ken Brown wrote:
>>> On 7/10/2013 2:07 PM, J. David Boyd wrote:
>>>>
>>>> I'm starting to see this error quite a bit in the terminal window I started
>>>> emacs from:
>>>>
>>>> 0 [main] emacs-X11 19400 C:\tools\cygwin\bin\emacs-X11.exe: *** fatal error in
>>>> forked process - failed to create new win32 semaphore, Win32 error 87
>>>
>>> Have you tried rebaseall
>>> (http://cygwin.com/faq.html#faq.using.fixing-fork-failures)?  This isn't
>>> the typical error message you see from rebase problems, but it can't
>>> hurt to try.  If that doesn't help, maybe you could test the build I
>>> mentioned at
>>
>> That doesn't look like the standard fork problem, Ken.  The error comes
>>from semaphore::_fixup_after_fork:
>> ...
>> Error code 87 is ERROR_INVALID_PARAMETER.  The only two things that I
>> can see which would cause that problem are "sec_non_nih" and
>> currentvalue.
>>
>> I'll change the error to report on currentvalue.  I assume that
>> currentvalue must be zero for some reason here and that is what is
>> causing the problem but it would be nice to know for sure.
>
> The current snapshot has this change and a shot-in-the-dark attempt to
> fix the reported problem as well.

Thanks.  It's also possible that this isn't a Cygwin problem.  There are 
known race conditions between emacs-24.3 and glib, which have been fixed 
in the newer version of emacs that I asked Dave to test.

Dave, instead of trying the new emacs right away, would you be willing 
to install the cygwin snapshot and see if that fixes the problem?  If 
not, could you report the error message and then try the new emacs?

Thanks.

Ken

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