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Re: master 2c79a8f 2/2: Use posix_spawn if possible.


From: Matt Armstrong
Subject: Re: master 2c79a8f 2/2: Use posix_spawn if possible.
Date: Fri, 28 Jan 2022 09:12:22 -0800

Eli Zaretskii <eliz@gnu.org> writes:

>> Date: Tue, 25 Jan 2022 14:25:23 +0200
>> From: Saulius Menkevicius <sauliusmenkevicius@fastmail.com>
>> Cc: p.stephani2@gmail.com, alan@idiocy.org, mituharu@math.s.chiba-u.ac.jp,
>>  emacs-devel@gnu.org
>> 
>> I certainly cannot answer that, it probably does some kind of sniffing 
>> on FDs and changes behaviour.
>> 
>> To actually figure that out I would need to build a minimal test fixture 
>> for this bug/issue and submit to dotnet/runtime repo on github for them 
>> to check and/or fix it.
>
> I think there's no way around this.  We need at least to understand
> what part of posix_spawn code interferes with pipe-based I/O used by
> these LSP servers, and why.

I don't find an emacs bug filed for this issue.  Saulius, it would be
good to file one.

This issue tickled a memory I had of Python moving away from posix_spawn
due to various portability issues: https://bugs.python.org/issue35823.
The issues they ran into and solved may inform this investigation.



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