Re: Display updates strangely - extra text appears and then disappears

[Eli Zaretskii <eliz@gnu.org>]

> From: asjo@koldfront.dk (Adam Sjøgren)
> Date: Sun, 26 Mar 2017 16:37:03 +0200
> 
> After this commit ('git bisect' tells me):
> 
>   commit 8275687bb908174b84021ee15ecd959733cecb9d
>   Author: Eli Zaretskii <eliz@gnu.org>
>   Date:   Sat Mar 25 16:59:17 2017 +0300
> 
>       Fix a segfault due to failure to realize some faces
> 
>       * src/xdisp.c (redisplay_internal): If the frame becomes garbaged
>       while redisplaying its windows, redisplay all of its windows
>       again.  (Bug#26097)
>       (init_iterator): When freeing all realized faces on all frames,
>       reset the 'face_change' flag of the frame whose window we are
>       about to iterate.
> 
> the *Group* buffer in Gnus has extra text where there should be none
> when you quit a summer and return. After 0.5-1 seconds the extra text
> disappears and the buffer looks normal again.

Thanks.  Can you provide a recipe starting from "emacs -Q" to
reproduce the problem?  Preferably without virtual desktops.