Re: c/5448: gcc emits internal error (unrecognized insn)

[Craig Rodrigues <rodrigc at mediaone dot net>]

----- Forwarded message from Olivier Jolly <ojolly@caramail.com> -----

Delivered-To: rodrigc@gcc.gnu.org
Posted-Date: Tue, 22 Jan 2002 07:24:29 +0100 (MET)
From: Olivier Jolly <ojolly@caramail.com>
To: rodrigc@gcc.gnu.org
X-Mailer: Caramail - www.caramail.com
X-Originating-IP: [80.11.125.56]
Subject: Re[1] c/5448: gcc emits internal error (unrecognized insn)
Date: Tue, 22 Jan 2002 07:24:29 GMT+1

> Synopsis: gcc emits internal error (unrecognized insn)
> 
> State-Changed-From-To: open->analyzed
> State-Changed-By: rodrigc
> State-Changed-When: Mon Jan 21 16:54:04 2002
> State-Changed-Why:
> Crash reproduced on gcc 3.0.3 and gcc 3.1 mainline.
> 
> The line which is causing the problem is:
> 
> section[pWrd - sCfgFileLine - 1] = '\0'; 
> 
> where the variables are:
> char *section;
> char *pWrd;
> char sCfgFileLine[8192];
> 
> What exactly are you trying to do in this piece of
> code? The compiler should not crash, but this code
> looks suspect.

thanks for your quick reply,
 this piece of code is code to recognize section declaration. It follows the following regex :
^\[(.*)\].*$

 pWrd is normally a pointer toward the ']' character inside the sCfgFileLine buffer. So, pWrd - sCfgFileLine - 1 should represent the actual size of the inner string, enclosed with brackets since it's the difference of 2 char*. The problematic line then should simply put a '\0' at the end of the freshly (re) allocated section variable.
 note: the very same expression is used on the line above without problem (	 strncpy( section, sCfgFileLine + 1, pWrd - sCfgFileLine - 1);) it's as array index that it causes problem.
 
I hope it will help making gcc even greater. Thanks for all and good luck

 regards

 Olivier Jolly

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