Re: gdb pty problem [Was: emacs gud-interface is not updated after gdb command execution (maybe because of incomplete output from gdb)]

[Ken Brown <kbrown at cornell dot edu>]

On 6/1/2016 2:28 PM, Corinna Vinschen wrote:
> On Jun  1 11:22, Ken Brown wrote:
> > 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.yano@nifty.ne.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
>
> I reverted commit 252a07b0ad3353abcd0fcd9b1b65ff977acd679e in git master
> for now, unless we find a reason to rework this again.

Thanks.  By the way, I'd like to take the opportunity to thank Peter 
Castro for the Cygwin Time Machine 
(http://www.fruitbat.org/Cygwin/#cygwintimemachine).  The bisection I 
did, spanning a period of about 4 years, would have been virtually 
impossible without it.

Ken


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