ssh cause mintty terminal not to close (tested on 4 cygwin installations)

[Thomas Wolff]

Am 02.08.2018 um 15:44 schrieb Niels Kristian Jensen:
> I've noticed a strange behavior of the standard Cygwin Terminal (mintty):
>
> If I open a Cygwin Terminal (using the shortcut on the desktop installed by
> Cygwin setup) and just press Ctrl-D, it writes "logout" and closes the
> window as expected.
>
> If I do the same, but give one command "ssh<enter>" first, the word
> "logout" appear, the window goes black, but the window does not close (!) The
> window can still be closed using the "X" in upper right corner.
>
> If I replace the command with "ssh -V<enter>", the window closes as
> expected when I press Ctrl-D.
>
> This may seem like a minor thing, but we have much trouble with Jenkins
> builds (started via Cygwin OpenSSH) which randomly hang forever - I wonder
>   if this could be a clue in this investigation.
>
> Tested versions:
>
> Windows Server 2008 R2
> OpenSSH_7.3p1, OpenSSL 1.0.2j  26 Sep 2016
> mintty 2.7.0 (i686-pc-cygwin)
>
> and
>
> Windows 10
> OpenSSH_7.6p1, OpenSSL 1.0.2m  2 Nov 2017
> mintty 2.8.1 (i686-pc-cygwin)
See https://github.com/mintty/mintty/issues/745; mintty 2.9.0 includes 
some tweaks to improve interworking with ssh.

> Only commented lines appear in /etc/ssh_config , ~/.bashrc and
> ~/.bash_profile on both systems.
>
> I would be glad if (some of) you could repeat this test on your system -
> perhaps this behavior is due to some local problem on my systems.
>
> Best regards,
>
> Niels Kristian Jensen
> Denmark
>
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