Eli Zaretskii writes:

>> Date: Sun, 08 Nov 2020 20:54:48 +0200
>> From: Eli Zaretskii <eliz@gnu.org>
>> Cc: eric@ericabrahamsen.net, 44506@debbugs.gnu.org
>> 
>> Please show the output of these GDB commands:
>> 
>>   (gdb) source /path/to/emacs/src/.gdbinit
>>   (gdb) frame 0
>>   (gdb) print *src
>>   (gdb) frame 3
>>   (gdb) pgrowx desired_row
>
> And one more:
>
>   (gdb) print composition_table_size
>

Please find the outputs attached.

Thanks.