bug#75056: 31.0.50; tty-child-frames with server / multiple clients possible hangs

[Gerd Möllmann]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Gerd Möllmann <gerd.moellmann@gmail.com>
>> Cc: lenbok@gmail.com,  75056@debbugs.gnu.org
>> Date: Fri, 27 Dec 2024 14:17:11 +0100
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> > But I'm not yet sure this is what we see in this case, which is why I
>> > asked for a C backtrace.  Producing it should be easy: just reproduce
>> > the problem, then attach a debugger and produce the backtrace.
>> 
>> See below. AFAICS, Emacs is waiting for input, and when we have some,
>> the wrong things will happen. Please note that this is not a full debug
>> build.
>
> Thanks.  This lacks the equivalent of "xbacktrace", so a bit hard to
> interpret, but I see read-from-minibuffer which called recursive-edit.
>
> What is the recipe for this, starting from "emacs -Q", please?  

The one the OP gave is good.

> Can this be reproduced without posframe?

No idea.