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


From: Kenichi Handa
Subject: bug#3659: FW: 23.0.95; crash on set-frame-font
Date: Fri, 24 Jul 2009 21:31:24 +0900

In article <address@hidden>, "Marshall, Simon" <address@hidden> writes:

> 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?

Then, try this:

(1) start emacs under gdb
(2) when the emacs window appears, type C-z (if you are
(using M-x gdb, type C-c C-z) to suspend emacs.
(3) set breakpoint in Fsignal
(4) continue
(5) do M-x set-frame-font
(6) when Emacs stops in Fsignal, do
  (gdb) pp error_symbol
  (gdb) pp data
  (gdb) bt full

---
Kenichi Handa
address@hidden







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