GNU bug report logs - #21796
[GTK] exiting ediff (with ediff-window-setup-function=ediff-setup-windows-default) can leave Emacs unresponsive to keyboard input

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Message #53 received at 21796 <at> debbugs.gnu.org (full text, mbox):

From: martin rudalics <rudalics <at> gmx.at>
To: Jonathan Doull <jonathan <at> hotlink.technology>
Cc: 21796 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> users.sourceforge.net>
Subject: Re: Bug#21796: exiting ediff can leave Emacs unresponsive to keyboard
 input
Date: Thu, 29 Jun 2017 09:17:56 +0200

> I've made this adjustment in my .emacs
>
>> (setq ediff-window-setup-function #'ediff-setup-windows-plain)
>
> and run for a few days now without any hangs, so I'd say this looks like a
> good workaround.

Certainly not!  But it supports my suspicion that focus shifting is
responsible for the problem.  Can you reproduce the original problem at
will so we can play with it?  Would have C-x 5 o got you out of that
stall?  Then it might be sufficient to replace some simple form like

    (if (frame-live-p main-frame)
	(select-frame main-frame))

with

    (if (frame-live-p main-frame)
	(select-frame-set-input-focus main-frame))

martin

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