bug#3659: FW: 23.0.95; crash on set-frame-font

["Marshall, Simon" <Simon.Marshall@misys.com>]

> > Breakpoint 1, abort () at emacs.c:433
> > 433       kill (getpid (), SIGABRT);
> > (gdb) where
> > #0  abort () at emacs.c:433
> > #1  0x00280904 in internal_condition_case (bfun=0x1a913c
> > <command_loop_1>, handlers=5385361, 
> >     hfun=0x1a85c4 <cmd_error>) at eval.c:1487
> 
> The code around there is this:
> 
> #if HAVE_X_WINDOWS
>   if (x_catching_errors ())
>     abort ();
> #endif
> 
> So, it seems that some X error happened.  Please check the
> contents of x_error_message to see what kind of error
> happened.
> 
> And also please start Emacs, do ESC : (x-synchronize t),
> then do M-x set-frame-font.

Ok, I get:

(gdb) p x_error_message 
$1 = (struct x_error_message_stack *) 0xa61100
(gdb) p *x_error_message 
$2 = {
  string =
"\000\233\333\000\000O\305\220\000\004\000\004\000'\000\026\000\000\030\
001\000Q\0301\000Q\030\001\000\000\000\000\000\000\0301\000\275\264\000\
000\000\000\037\000+\000\004\000)\000\026\000\000\201\201\000Q\0301\000Q
\030\001\000\000\000\000\000\000\0301\000\300b\000\000\000\000\037\000T\
000\004\000F\000\026\000\0002\271\000Q\0301\000Q\030\001\000\000\000\000
\000\000\0301\000\300\252\000\000\000\000\037\000\232\000\004\000?\000\0
26\000\000\272Y\000Q\0301\000Q\030\001\000\000\000\000\000\000\0301\000\
302.\000\000\000\000\037\000\331\000\004\0004\000\026\000\0002\271\000Q\
0301\000Q\030\001\000\000\000\000\000\000\0301\000\000\000\000\000\234\2
23\031\000Q\0301\000Q\030\001\000\234\222\271", 
  dpy = 0xa0e000, 
  prev = 0x0
}
(gdb) 

Which doesn't look overly helpful.  

I see it has a leading \000.  Does it mean there were more
x_catch_errors() calls than x_uncatch_errors()?  I tried to put a
breakpoint on x_error_catcher(), but it was never triggered before the
call to abort().

What next to try?  Thanks, Simon.


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