GNU bug report logs -
#56025
29.0.50; em-extpipe-test-2 times out on EMBA and Cygwin
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Reported by: Ken Brown <kbrown <at> cornell.edu>
Date: Thu, 16 Jun 2022 18:36:02 UTC
Severity: normal
Found in version 29.0.50
Fixed in version 29.1
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
Full log
Message #17 received at 56025 <at> debbugs.gnu.org (full text, mbox):
Hello,
On Fri 17 Jun 2022 at 09:39am -04, Ken Brown wrote:
> On 6/16/2022 6:01 PM, Ken Brown wrote:
>> On 6/16/2022 3:30 PM, Sean Whitton wrote:
>>> Hello Ken,
>>>
>>> On Thu 16 Jun 2022 at 02:30pm -04, Ken Brown wrote:
>>>
>>>> In commit 231a1ba3, Lars disabled the extpipe tests on EMBA "because they
>>>> apparently time out". The EMBA log he cited in the commit message shows that
>>>> only em-extpipe-test-2 times out. And this same test (but no others) also times
>>>> out on Cygwin:
>>>
>>> That test invokes `sh -c "rev >temp"` as its only subprocess, so that's
>>> probably what is timing out. Is there something different about
>>> Cygwin's sh? Something about EOFs?
>>
>> I'm not aware of anything different. Here's what happens when I run the test
>> interactively:
>>
>> $ time echo \"bar\" | sh -c "rev >temp"
>>
>> real 0m0.100s
>> user 0m0.030s
>> sys 0m0.030s
>>
>> $ cat temp
>> "rab"
>>
>> And keep in mind that the test also times out on EMBA.
>
> I just tried a different experiment: In an interactive emacs-29 session, I
> started eshell and typed
>
> echo \"bar\" | rev *>temp
>
> Nothing visible happens until I type 'C-c C-c'. Then a prompt appears again,
> and 'ls -l' shows that temp exists and is empty.
>
> Prior to typing 'C-c C-c', 'M-x list-processes' (or 'C-c C-s') shows a bash
> process running but it doesn't show 'rev'. But running 'ps' outside of emacs
> shows both 'rev' and its parent 'bash' process.
>
> It does seem that there's an actual bug here, not just a test that should be
> skipped because it times out. It could be a Cygwin bug, of course, but that
> doesn't explain the EMBA failure.
Could you see if the same thing happens if you type
echo "bar" | sh -c "rev >temp"
into an interactive session, please?
If it's the same then extpipe has uncovered a general Eshell bug.
--
Sean Whitton
This bug report was last modified 2 years and 350 days ago.
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