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Subject:	Re: gdb pty problem [Was: emacs gud-interface is not updated after gdb command execution (maybe because of incomplete output from gdb)]
To:	cygwin AT cygwin DOT com
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From:	Ken Brown <kbrown AT cornell DOT edu>
Message-ID:	<91397a76-1265-1cda-45e2-573e63b48fa3@cornell.edu>
Date:	Wed, 1 Jun 2016 11:22:25 -0400
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On 6/1/2016 10:33 AM, Ken Brown wrote:
> On 6/1/2016 10:28 AM, Corinna Vinschen wrote:
>> Hi Ken,
>>
>> On Jun  1 09:02, Ken Brown wrote:
>>> On 6/1/2016 8:51 AM, Ken Brown wrote:
>>>> On 5/31/2016 5:41 AM, Corinna Vinschen wrote:
>>>>> Any chance you could bisect Cygwin to help finding the culprit?
>>>>
>>>> The culprit is
>>>>
>>>> commit 252a07b0ad3353abcd0fcd9b1b65ff977acd679e
>>>> Author: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
>>>> Date:   Fri Apr 3 13:07:35 2015 +0900
>>>>
>>>>    Cygwin hangs up if several keys are typed during outputting a lot of
>>>> texts.
>>>>
>>>>        * fhandler_tty.cc (fhandler_pty_slave::read): Change
>>>> calculation of
>>>>        "readlen" not to use "bytes_in_pipe" value directly.
>>>>
>>>>
>>>> Reverting that commit fixes the problem.
>>>
>>> Unfortunately, all kinds of other things break.  For example, emacs
>>> exits
>>> immediately, ls produces no output,....
>>
>> Are you sure?  I just tried it myself and ls as well as emacs work
>> fine for me.
>
> It works for me now too.  I must have done something wrong the first
> time I tried.

And this also fixes the original problem in emacs that started the thread:

   https://www.cygwin.com/ml/cygwin/2016-05/msg00318.html

Ken


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