bug#67155: 30.0.50; (x-synchronize t) garbels display

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Gregor Zattler <grfz@gmx.de>
>> Date: Tue, 14 Nov 2023 00:58:21 +0100
>> 
>> I cannot reproduce with -Q, but evaluating
>> `(x-synchronize t)' sometimes garbles display.  See
>> attached screenshot.  Note: When copying the region
>> shown in the screenshot and pasting into nano, the text
>> is correct, not garbled.
>> 
>> Evaluation of `(x-synchronize t)' is part of the
>> attempt to capture a usable backtrace for bug#66978.
>> 
>> Now this display bug is another one.  If you have any
>> ideas how to investigate these I would be happy to help
>> following instructions.
>
> Po Lu, any ideas or suggestions?

Not really, unless you (Gregor) try running Emacs with the X font
backend for a while, and tell me whether the problem abates then:

  (set-frame-parameter nil 'font-backend 'x)

TIA.