Re: *shell* buffer freezes within Cygwin and Emacs 27.1

[Takashi Yano <takashi.yano@nifty.ne.jp>]

On Wed, 3 Feb 2021 15:45:36 -0700
Randy Galbraith via Cygwin <cygwin@cygwin.com> wrote:
> Hi Everyone.
> 
> Please note: I attempted to post this message from my work
> email. I do not believe it every arrived.
> 
> My long used work flow has recently stopped working. I'm trying to
> understand why and how it could be resolved. The failing steps are:
> 
> Cygwin64 Terminal (bash prompt)
> startx -- :1 -multiwindow -clipboard &
> xterm
> emacs -q
> M-x shell
> $ cmd
> 
> I expect to get a Windows 10 command prompt that works. Instead the shell
> buffer display cmd output incorrectly formatted (e.g. extra white space)
> and when I type a command like dir it freezes.
> 
> I suspect this may be an issue related to a recent Windows 10 update
> that in turn has changed the way cmd interacts with Cygwin bash and
> Emacs. I have completed a re-install to the latest version (as of
> 2/1/2021). Alas, this did not resolve the problem.
> 
> ** details **
> $ uname -r
> 3.1.7(0.340/5/3)
> GNU Emacs 27.1 (build 1, x86_64-pc-cygwin, GTK+ Version 3.22.28)
> of 2020-10-29
> ** details end **
> 
> See below for *shell* buffer and cygcheck output.
> 
> Kind regards,
> -Randy Galbraith
> 
> ** *shell* buffer **
> ^[]0;~^G
> xxxxxxxxx@xxxxxxxxxxx ~
> $ cmd
> <snip malformed output>
> 
> $ Microsoft Windows [Version 10.0.17763.1697]
> (c) 2018 Microsoft Corporation. All rights reserved.
> 
> C:\cygwin64\home\xxxxxxxxx>dir
> dir
> ^ frozen at this point
> ** *shell* buffer end **

Please try latest cygwin snapshot.
https://cygwin.com/snapshots/

Or
env CYGWIN=disable_pcon emacs -q
instead of just
emacs -q

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>