bug#51336: 29.0.50; Application not responding

[Eli Zaretskii]

> From: "Kirill A. Korinsky" <kirill@korins.ky>
> Date: Thu, 28 Dec 2023 18:55:02 +0100
> Cc: stefankangas@gmail.com,
>  51336@debbugs.gnu.org,
>  Lars Magne Ingebrigtsen <larsi@gnus.org>,
>  alan@idiocy.org
> 
> I've reproduced this issue a few times and attached lldb to see where it 
> blocked.
> 
> All attempts were the same:
> 
> > (lldb) bt all
> > * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
> >   * frame #0: 0x00007ff817ed220a libsystem_kernel.dylib`__read_nocancel + 10
> >     frame #1: 0x00007ff817de5fb9 libsystem_c.dylib`_sread + 16
> >     frame #2: 0x00007ff817de5f68 libsystem_c.dylib`__srefill1 + 24
> >     frame #3: 0x00007ff817de39b8 libsystem_c.dylib`__svfscanf_l + 2059
> >     frame #4: 0x00007ff817e39a2f libsystem_c.dylib`scanf + 196
> >     frame #5: 0x000000010ea0800a emacsql-sqlite`main + 234
> >     frame #6: 0x00000001173db52e dyld`start + 462
> > (lldb)

Thanks, but I have no idea what this could mean.  What is the source
of the SIGSTOP signal?