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Re: Problems remaining in FOR-RELEASE

From: Johan Bockgård
Subject: Re: Problems remaining in FOR-RELEASE
Date: Fri, 18 Mar 2005 14:16:09 +0100
User-agent: Gnus/5.110003 (No Gnus v0.3) Emacs/22.0.50 (usg-unix-v)

address@hidden (Kim F. Storm) writes:

> +-----------------------------------------------------
> | ** Investigate face cache related crash.
> |  
> | Indications: Face cache seems to have been cleared, but
> | redisplay uses an invalidated face_id with FACE_FROM_ID
> | which then returns a NULL pointer.  Said to happen with
> | isearch faces.
> I installed fixes related to this problem recently, and have not
> received any indications that the problem still exists. So if some
> of you still see the problem, please tell me.

I can still make it crash:


Using `C-x 3' in `emacs -nw -Q' after evaluating the following code
makes emacs crash:

 (let* ((face 'isearch)
        (face-offset (lsh (face-id face) 19)))
   (+ face-offset ?\|)))


(gdb) p face
$1 = (struct face *) 0x0
(gdb) bt
#0  turn_on_face (f=0x903710, face_id=27) at term.c:1911
#1  0x0000000000467d26 in write_glyphs (string=0x2a96c7f628, len=24)
    at term.c:965
#2  0x0000000000411db2 in update_frame_line (f=0x903710, vpos=0)
    at dispnew.c:5656
#3  0x0000000000410fab in update_frame_1 (f=0x903710, force_p=0, 
    inhibit_id_p=0) at dispnew.c:5154
#4  0x000000000040f297 in update_frame (f=0x903710, force_p=0, 
    inhibit_hairy_id_p=0) at dispnew.c:3853
#5  0x0000000000429484 in redisplay_internal (preserve_echo_area=9451280)
    at xdisp.c:10432


Johan Bockgård

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