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Date:	Sun, 9 Jul 2023 13:50:17 -0400
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From:	Ken Brown via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Ken Brown <kbrown AT cornell DOT edu>
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On 7/9/2023 12:55 PM, Eliot Moss wrote:
> On 7/9/2023 11:56 AM, Ken Brown via Cygwin wrote:
>> On 7/8/2023 9:37 PM, Eliot Moss via Cygwin wrote:
>>> Dear cygwin-ers --
>>>
>>> I'm running 64-bit cygwin 3.4.7-1 and lately I've been getting these 
>>> vfork
>>> errors from emacs-gtk when I try to run dired on a directory.  I 
>>> believe this
>>> tries to fork ls to get the necessary file information.  I've tried 
>>> updating
>>> cygwin, which runs rebase, and I've tried rebooting my Windows 11 
>>> system.  I
>>> thought the newer 64-bit Cygwin was supposed to have overcome this 
>>> historic
>>> issue in 32-bit Cygwin ...
>>>
>>> Anyway, I attach output from cygcheck -s -v -r -h and also from ldd
>>> /usr/bin/emacs.
>>>
>>> Any guidance on fixing this would be appreciated.  IIRC, cyggif is 
>>> the library
>>> that had a conflict.
>>
>> Your cygcheck output shows that you're using the test release of 
>> emacs, which is built with the native compilation feature.  As 
>> explained in the release announcement, fork failures are to be 
>> expected unless you take certain steps to make sure that the .eln 
>> files get rebased:
>>
>>    https://cygwin.com/pipermail/cygwin/2022-September/252217.html
> 
> Thanks for the response, Ken!
> 
> Indeed I have the necessary file with the necessary line in it:
> 
> cat /var/lib/rebase/userpath.d/moss
> /home/moss/.emacs.d/eln-cache

That's too bad.  I was hoping for an easy solution.

> whoami is definite that my username is moss.
> 
> I will try the ephemeral rebase and see if that holds me until a restart,
> but I have definitely run setup, mor than once, since this started
> happening.  

You might check /var/log/setup.log.full to see if there's anything that 
looks strange regarding rebasing.

> If it's of help, I offer the result of ls -lR 
> ~/.emacs.d/eln-cache
> below.  Should I delete the .tmp files?

It wouldn't hurt to delete them, but I doubt if it will help either.

> Also, some of the permissions are
> different from others; could that be interfering with rebase?  (Not sure 
> how
> they got that way, either!)

It looks to me like the permissions are different only for the .tmp 
files, so I don't think that's the issue.

I'm stumped.  Maybe someone else will have an idea.

Ken

P.S. You mentioned the cyggif DLL.  Is that consistently the one 
mentioned in the error message?  If so, you might try forcibly rebasing 
it to a new address.  I recall having to do that occasionally in the 
distant past, although that was probably for 32-bit Cygwin.

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