bug#66978: 30.0.50; crashed when closing one of two frames

[Po Lu]

Gregor Zattler <grfz@gmx.de> writes:

> * Po Lu <luangruo@yahoo.com> [2023-11-08; 08:49 +08]:
>> The error is BadGlyphSet, and its source is a RenderFreeGlyphSet
>> request.  I suspect a font backend is involved, since Emacs doesn't
>> issue such requests on its own accord.
>>
>> I need a backtrace from Emacs running in synchronous X mode to
>> establish
>> which font driver function is making this request.  Please run Emacs
>> as
>> follows:
>>
>>   ./emacs -q -xrm 'Emacs.synchronous: true'
>>
>> and retrieve a backtrace from that.
>
> Starting program:
> /home/grfz/src/emacs-master--078cfe807295038fa321c9297e24de5145065622--2023-11-02T00-38+01-00/src/emacs
> -q -xrm "Emacs.synchronous: true" --fg-daemon="${EMACS_SERVER_NAME}"
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library
> "/lib/x86_64-linux-gnu/libthread_db.so.1".
>
> Breakpoint 2, x_error_quitter (display=0x5555561ed2e0, event=0x0) at
> ./src/xterm.c:26956
> 26956 {
> #0 x_error_quitter (display=0x5555561ed2e0, event=0x0) at
> ./src/xterm.c:26956
> #1 0x0000555555701446 in x_error_handler (display=0x5555561ed2e0,
> event=0x7fffffffc3d0) at ./src/xterm.c:26944
> #2 0x00007ffff7c999eb in _XError () at
> /lib/x86_64-linux-gnu/libX11.so.6
> #3 0x00007ffff7c96657 in () at /lib/x86_64-linux-gnu/libX11.so.6
> #4 0x00007ffff7c966f5 in () at /lib/x86_64-linux-gnu/libX11.so.6
> #5 0x00007ffff7c971a2 in _XEventsQueued () at
> /lib/x86_64-linux-gnu/libX11.so.6

The synchronous resource didn't take effect here, so the backtrace still
doesn't fit the bill, I'm afraid.  I don't know if -xrm options are
taken into account when Emacs is started in daemon mode, so perhaps try
running:

   (x-synchronize t)

in a frame created by the daemon after it starts.  TIA.