bug#75275: 30.0.92; `make-thread` bug on macOS 15.2

["Gerd Möllmann" <gerd.moellmann@gmail.com>]

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>>> From: Gerd Möllmann <gerd.moellmann@gmail.com>
>>> Cc: Stefan Kangas <stefankangas@gmail.com>,  Alan Third <alan@idiocy.org>,
>>>   75275@debbugs.gnu.org
>>> Date: Thu, 02 Jan 2025 08:30:25 +0100
>>> 
>>> Eli Zaretskii <eliz@gnu.org> writes:
>>> 
>>> > From the backtrace of the new Lisp thread, it looks like it finished
>>> > sleeping for 1 sec and then it proceeds to calling [NSApp run]
>>> 
>>> I think that's the problem, see my other reply to Stefan.
>>
>> So should we add a condition before calling [NSApp run] that we are in
>> the main thread?
>
> ATM, I don't understand how we land in that line in ns_select_1 if not
> [NSThread isMainThread]. Maybe I need new glasses. I asked Stefan if he
> can see something in LLDB.

Actually, consider that fast explained. I somehow hallucinated a return
in that here. But I still don't know if putting an if around the NSApp
run is sufficient or not. I don't understand the code, TBH.