bug#62816: 30.0.50; ElDoc blinks echo area when eldoc-documentation-compose is used

[Eli Zaretskii]

> From: João Távora <joaotavora@gmail.com>
> Date: Fri, 14 Apr 2023 20:58:16 +0100
> Cc: dmitry@gutov.dev, 62816@debbugs.gnu.org
> 
> > > > Perhaps we want to backport it to emacs-29 as well? It *is* a bug, after
> > > > all.
> > >
> > > Perhaps.  Yes it's a bug.  But at this point, I think that's for Eli
> > > to decide (i.e. I don't exactly what the policy is now vs two/three
> > > weeks ago).
> >
> > It depends on how bad is the bug, whether it's a regression since
> > Emacs 28, and how safe is the fix.  In general, bugs should be fixed
> > on the release branch, unless the risk associated with the fix is too
> > high.
> 
> Right, exactly.  We were just talking about that.  This is not a
> regression from Emacs 28 (I'm 99% sure).  It was already there.
> But the bug is so-so-serious (somewhat annoying flickering, though
> not in TTY frames).  The fix is simple enough (IMHO, of course,
> because I wrote the code ... and the bug).

What is the bug, exactly?  Is it just that the mini-window gets
resized back and forth in some scenario?  Or is it something else?

> Do note, also, Eli, that ElDoc is a :core package.  So, if we
> don't backport, people really really annoyed with this bug (
> which manifests itself with Eglot primarily, though it could
> manifest with other packages) can get the bugfix if they simply
> upgrade ElDoc OR Eglot.  Whether it's easy or not to do that
> is a matter for bug#62720.  Of course they might also get
> _other_ bugs and new features, etc if they upgrade.

Right, so I don't think this aspect is very relevant to the decision
whether to backport the fix.

> So maybe that weighs on your decision.  You can check out the fix
> in 83b5e9cd24ddcbb04dbd5db9a07248ff7fa301ab.

Sounds scary.  I'd prefer to leave it on master at this time.  Unless
the bug it fixes is more than just resizing of the mini-window.

Thanks.