bug#81407: 31.0.90; Crash in display_line: stale glyph_row after window-config change from menu-bar :enable eval during redisplay

Eli Zaretskii [16/Jul  1:05pm +03] wrote:
>> From: Aaron Iba <[email protected]>
>> Date: Wed, 15 Jul 2026 09:23:56 -0400
>> Cc: [email protected]
>>
>> > We need something smarter, and perhaps more radical.  Let me think
>> > about this.
>>
>> Understood, and agreed on the infloop risk: in the recipe the second
>> pass happens to stabilize only because the rows array moves just when
>> the window exceeds its historical maximum height, so a retry
>> succeeds; Lisp that alternates between two window configurations
>> would defeat any plain retry scheme.  Happy to test whatever you
>> settle on -- I can reproduce at will, both with the -Q recipe and
>> with the original configuration.
>
> Try the patch below, it seems to avoid the trouble here.

It seems that this patch makes an improvement; shall we install it on
the release branch?

Also, do we have any reason to think this is a bug introduced in Emacs
31?  It seems like it is probably older.  I don't have a macOS machine
to test on.

-- 
Sean Whitton