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

[Eli Zaretskii]

> From: Tino Calancha <tino.calancha@gmail.com>
> Cc: Bhavin Gandhi <bhavin7392@gmail.com>,  uyennhi.qm@gmail.com,
>   42655@debbugs.gnu.org,  eggert@cs.ucla.edu,  monnier@iro.umontreal.ca
> Date: Wed, 05 Aug 2020 20:57:18 +0200
> 
> (gdb) 
> p selected_frame
> &"p selected_frame\n"
> ~"$1 = XIL(0x14f0835)\n"
> ^done
> (gdb) 
> xtype
> &"xtype\n"
> ~"Lisp_Vectorlike"
> ~"\n"
> ~"PVEC_FRAME"
> ~"\n"
> ^done
> (gdb) 

OK, now the important part:

  (gdb) p XFRAME (selected_frame)
  (gdb) p *$

The last command should display all the members of 'struct frame' that
correspond to the frame which doesn't redisplay.

Just to be sure: you are typing these commands in a situation where
you did NOT yet create another frame, this is the same frame which was
iconified by C-z, right?  I want to be sure we display the problematic
frame, not some other one.

Thanks.