GNU bug report logs - #77988
31.0.50; No more images after fullscreen and load-theme

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From: Po Lu <luangruo <at> yahoo.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 77988 <at> debbugs.gnu.org, alan <at> idiocy.org, eg642616 <at> gmail.com, manuel <at> ledu-giraud.fr
Subject: bug#77988: 31.0.50; No more images after fullscreen and load-theme
Date: Sat, 28 Jun 2025 22:17:28 +0800

Eli Zaretskii <eliz <at> gnu.org> writes:

>> > Thanks.  This part looks suspicious:
>> > 
>> > >   spec = {
>> > >     i = 0x14fbfc3
>> > >   },
>> > >   dependencies = {
>> > >     i = 0x14fc273
>> > >   },
>> > 
>> > These are Lisp objects, and in the "good" case they were 64-bit
>> > values:
>> > 
>> > >   spec = {
>> > >     i = 0x7ffff4627b53
>> > >   },
>> > >   dependencies = {
>> > >     i = 0x7ffff4627673
>> > >   },
>> > 
>> > So it seems somehow the offending commit causes their truncation?  Or
>> > maybe these Lisp objects were GC'ed (but how could that happen, when
>> > all the images in the image cache are marked?).

This proved to be a red herring.  I believe the real culprit should have
been resolved, namely, XRender surfaces were not being invalidated when
the windows to which they are attached were resized without occasioning
a matching reconfiguration of their parent windows, which is likelier on
X toolkit builds than elsewhere.

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