GNU bug report logs - #9496
24.0.50; Segfault on TAB-only composition

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Package: emacs;

Reported by: Johan Bockgård <bojohan <at> gnu.org>

Date: Tue, 13 Sep 2011 20:27:01 UTC

Severity: important

Merged with 9775

Found in versions 24.0.50, 24.0.90

Done: Chong Yidong <cyd <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #36 received at 9496 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: 9496 <at> debbugs.gnu.org
Subject: Re: bug#9496: 24.0.50; Segfault on TAB-only composition
Date: Fri, 03 Feb 2012 23:22:34 +0200

> Date: Fri, 03 Feb 2012 11:28:29 -0800
> From: Paul Eggert <eggert <at> cs.ucla.edu>
> 
> -static int
> +static EMACS_INT
>  char_width (int c, struct Lisp_Char_Table *dp)
>  {
> -  int width = CHAR_WIDTH (c);
> +  EMACS_INT width = CHAR_WIDTH (c);

Oh, come on!  CHAR_WIDTH returns the character's width
_on_the_screen_.  So how in the world could it _ever_ overflow a
32-bit integer??
This bug report was last modified 13 years and 170 days ago.

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