On Sat, Apr 15, 2017 at 1:04 PM, Augie Fackler <r...@durin42.com> wrote:
>
>> On Apr 15, 2017, at 5:48 AM, Yuya Nishihara <y...@tcha.org> wrote:
>>
>> On Thu, 13 Apr 2017 16:17:34 -0400, Augie Fackler wrote:
>>> # HG changeset patch
>>> # User Augie Fackler <au...@google.com>
>>> # Date 1492114180 14400
>>> #      Thu Apr 13 16:09:40 2017 -0400
>>> # Node ID ec81fd7580f3e31aa92e8834ffbcf2a8e80e72e3
>>> # Parent  35afb54dbb4df2975dbbf0e1525b98611f18ba85
>>> sshpeer: try harder to snag stderr when stdout closes unexpectedly
>>>
>>> Resolves test failures on FreeBSD, but I'm not happy about the fix.
>>>
>>> diff --git a/mercurial/sshpeer.py b/mercurial/sshpeer.py
>>> --- a/mercurial/sshpeer.py
>>> +++ b/mercurial/sshpeer.py
>>> @@ -110,9 +110,17 @@ class doublepipe(object):
>>>             if mainready:
>>>                 meth = getattr(self._main, methname)
>>>                 if data is None:
>>> -                    return meth()
>>> +                    r = meth()
>>>                 else:
>>> -                    return meth(data)
>>> +                    r = meth(data)
>>> +                if not r and data != 0:
>>
>> I'm not sure what this condition is intended for. It's always true for
>> write() because r is None and data is a str.
>
> This forwarder is also used for read(), where data is the number of bytes to 
> be read. At least, I think that’s right, now I’m doubting myself.

Should I go ahead and mail this patch? Perhaps with some extra
comments? Or do people object to this fix?

>
>>
>>> +                    # We've observed a condition that indicates the
>>> +                    # stdout closed unexpectedly. Check stderr one
>>> +                    # more time and snag anything that's there before
>>> +                    # letting anyone know the main part of the pipe
>>> +                    # closed prematurely.
>>> +                    _forwardoutput(self._ui, self._side)
>>> +                return r
>
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