bug#42655: 27.1; iconify-frame on a Lucid build may stuck the frame

[Eli Zaretskii]

> From: Bhavin Gandhi <bhavin7392@gmail.com>
> Date: Wed, 5 Aug 2020 22:53:15 +0530
> Cc: tino.calancha@gmail.com, 42655@debbugs.gnu.org, eggert@cs.ucla.edu, 
>       monnier@iro.umontreal.ca, uyennhi.qm@gmail.com
> 
> Thanks for the suggestion, here is the backtrace at the point when Emacs
> is stuck. Adding it as an attachment.

Thanks, this backtrace says that Emacs is just waiting for input.

Please try this now, after attaching the debugger:

 (gdb) source /path/to/emacs/src/.gdbinit
 (gdb) p selected_frame
 (gdb) xtype

(replace "/path/to/emacs" with the actual absolute file name of the
Emacs source tree on your system).  Then post here the results.  And
please keep the GDB session running, don't exit it and don't kill
Emacs.