From bug-request at octave dot org Thu Mar 10 14:25:41 2005
Subject: octave_config_info bug?
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: "Dmitri A. Sergatskov" <dmitri at unm dot edu>
Cc: "bug at octave dot org" <bug@octave.org>
Date: Thu, 10 Mar 2005 15:32:14 -0500

On  7-Mar-2005, Dmitri A. Sergatskov <dmitri at unm dot edu> wrote:

| GNU Octave, version 2.1.67 (i686-pc-linux-gnu).
| 
| ...
| 
| octave:1> octave_config_info("junk")
| panic: Segmentation fault -- stopping myself...
| Segmentation fault
| 
| 
| It works fine with "legitimate" input or with no input at all:
| 
| octave:1> octave_config_info ("CC")
| ans = gcc

Please try the following patch.

Thanks,

jwe


src/ChangeLog:

2005-03-10  John W. Eaton  <jwe at octave dot org>

	* toplev.cc (Foctave_config_info): Print error instead of crashing
	if struct does not contain field we are looking for.


Index: src/toplev.cc
===================================================================
RCS file: /usr/local/cvsroot/octave/src/toplev.cc,v
retrieving revision 1.153.2.2
diff -u -r1.153.2.2 toplev.cc
--- src/toplev.cc	12 Feb 2005 02:29:53 -0000	1.153.2.2
+++ src/toplev.cc	10 Mar 2005 20:23:14 -0000
 at @ -798,7 +798,11 @@
       if (! error_state)
 	{
 	  Cell c = m.contents (arg.c_str ());
-	  retval = c(0);
+
+	  if (c.is_empty ())
+	    error ("octave_config_info: no info for `%s'", arg.c_str ());
+	  else
+	    retval = c(0);
 	}
     }
   else if (nargin == 0)



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