bug#29661: 27.0.50; emacs crashing on exchange-point-and-mark

[Eli Zaretskii]

> From: Robert Marshall <robert.marshall@codethink.co.uk>
> Date: Thu, 14 Dec 2017 08:35:21 +0000
> Cc: 29661@debbugs.gnu.org
> 
> I assume the windows failure to crash is because there isn't an X failure.

Do you perhaps have some utility installed that attempts to manage the
X clipboard and selections?  If so, can you disable it and see if the
problem goes away?

Basically, the question is why does X fail or close the connection
with Emacs.