bug#22214: 25.0.50; lock up with gui dialogs and clipmon-mode

[Eli Zaretskii]

> From: Brian Burns <bburns.km@gmail.com>
> Date: Thu, 24 Dec 2015 01:43:39 -0600
> Cc: Eli Zaretskii <eliz@gnu.org>, 22214@debbugs.gnu.org
> 
> I looked at some of the internals - as Eli said there's an event loop for the 
> x
> dialog that also checks the existing Emacs timers, which in this case would be
> checking the x selection and starting another timer. 

What I don't understand is how menus enter the picture, since the
lockup doesn't happen unless a menu is open.

Understanding that might be an important step towards finding a
solution.