GNU bug report logs - #43700
28.0.50; Crash creating a second frame

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Message #35 received at 43700 <at> debbugs.gnu.org (full text, mbox):

From: Andy Moreton <andrewjmoreton <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 43700 <at> debbugs.gnu.org
Subject: Re: bug#43700: 28.0.50; Crash creating a second frame
Date: Sat, 3 Oct 2020 13:26:09 +0100

On 03/10/2020 09:16, Eli Zaretskii wrote:
> OK.  x-create-frame in w32fns.c initializes the basic faces of the
> frame, here:
> 
>    /* Init faces first since we need the frame's column width/line
>       height in various occasions.  */
>    init_frame_faces (f);
> 
> I suggest to put a breakpoint after that function returns, and when it
> breaks for the second frame you are creating, put a watchpoint on the
> frame's face cache, like this:
> 
>    (gdb) watch -l f->face_cache->used if f->face_cache->used == 0
> 
> Then produce a backtrace from any time this watchpoint fires.  That
> should show us the culprit.

The watchpoint does not fire before the segfault, so there is clearly 
something wrong with gdb on this platform :-(

    AndyM

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