bug#64101: 29.0.91; Eglot inlay hints rendered out of order

[João Távora]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: João Távora <joaotavora@gmail.com>
>> Cc: Krzysztof Klimonda <kklimonda@syntaxhighlighted.com>,
>>   64101@debbugs.gnu.org
>> Date: Sat, 17 Jun 2023 10:39:32 +0100
>> 
>> Anyway, I tried to reproduce the problem on both Emacs 29
>> and 30 and couldn't.
>> 
>> The problem also doesn't happen on Emacs 28.  So I don't know what is up
>> and the "recent overlay rewrite" (when?) doesn't seem to have an effect.
>> I don't have a Mac OS machine to test.
>
> Emacs 29 comes with a completely different implementation of overlays
> than previous versions.
>
> I don't think this is specific to macOS, but perhaps the order in
> which overlays are arranged is arbitrary to some extent, in which case
> different systems can have different orders.

I would find this "undefined order" strange, and perhaps a bug in
itself.  Maybe whoever rewrote the overlay code (Stefan?) could chime
in.

In any case, one defensive option is to push the patch I showed to Emacs
29.  Subject, of course, to testing on at least some machine where the
problem does indeed happen.

João