bug#63711: 30.0.50; Crash in xdisp.c when it->string is 0x0

[Thomas Fitzsimmons]

Hi Eli,

Thomas Fitzsimmons <fitzsim@fitzsim.org> writes:

> Eli Zaretskii <eliz@gnu.org> writes: 
>
> > > Cc: 63711@debbugs.gnu.org Date: Thu, 25 May 2023 18:54:13 
> > > +0300 From: Eli Zaretskii <eliz@gnu.org>  
> > > > >   (gdb) p first_row_to_display->y 
> > > >  $24 = 701  
> > > > >   (gdb) p window_text_bottom_y(w) 
> > > >  $25 = 701 
> > >  And this also tells us that we are using the wrong glyph row, 
> > > I think: its Y coordinate is outside of the visible text area. 
> > > I think I understand the problem.  Let me think about a 
> > > solution. 
> >
> > I installed a fix on the emacs-29 branch, let's hope it fixes 
> > this. 
>
> Thank you; I'm running a "-g -O0" build of emacs-29 tip now, 
> with GDB attached.  I'll follow up in a month to confirm 
> success, provided there are no issues in the meantime. 

I haven't seen this particular crash in over a month, after having 
applied your patch; whereas before your patch I saw it at least 
twice, so it seems your patch fixed the issue.  I'm closing this 
bug report.

Thanks!
Thomas