bug#72692: Emacs 31.05 (40eecd594ac) get SIGSEGV on Linux (Linux 6.6.45 Kde Wayland)

[Eli Zaretskii <eliz@gnu.org>]

> Cc: pipcet@protonmail.com, execvy@gmail.com, 72692@debbugs.gnu.org,
>  juri@linkov.net
> Date: Thu, 29 Aug 2024 15:26:07 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > From: Po Lu <luangruo@yahoo.com>
> > Cc: Juri Linkov <juri@linkov.net>,  pipcet@protonmail.com,
> >   execvy@gmail.com,  72692@debbugs.gnu.org
> > Date: Thu, 29 Aug 2024 20:06:17 +0800
> > 
> > Eli Zaretskii <eliz@gnu.org> writes:
> > 
> > > Po Lu, is there any reason why frame-parameter handlers for GUI frames
> > > should ignore the fact that the new value of a parameter is exactly
> > > equal to the old value?  Is there some subtle issue here, and if so,
> > > does it affect all the parameters or only some?
> > 
> > No reason occurs to me why redundant changes shouldn't be discarded in
> > the case of alpha-background, but modifications to other parameters
> > (e.g. Qfullscreen) always trigger recomputation of various window
> > manager properties and states, which is not redundant when these
> > properties change without Emacs's knowledge.
> 
> OK, I was aware of the issues with Qfullscreen.
> 
> But what about the rest?  Would you mind reviewing the other handlers
> in frame.c, and telling which ones should do their thing regardless of
> whether the old and the new value of the parameter are identical?

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