bug#15686: 24.3.50; Face related crash in current trunk

[martin rudalics]

>>  >> #0  terminate_due_to_signal (sig=22, backtrace_limit=2147483647) at 
emacs.c:350
>>  >> #1  0x01151496 in die (msg=0x146e018 "((((struct vectorlike_header *) ((void *) ((font_object) - 
(Lisp_Vectorlike)))) ->size) & (PSEUDOVECTOR_FLAG | PVEC_TYPE_MASK)) == (PSEUDOVECTOR_FLAG | (PVEC_FONT << 
PSEUDOVECTOR_AREA_BITS))", file=0x146d0b0 "xfaces.c", line=5261) at alloc.c:6670
>>  >> #2  0x010d7ab0 in realize_default_face (f=0x3c2f770) at xfaces.c:5261
>>  >
>>  > What kind of object is font_object in frame #2?
>>
>> What can I do to find out?
>
> As with any Lisp object:
>
>   (gdb) p font_object
>   (gdb) xtype

But when (or where) do I do that?

martin