From bug-octave-request at bevo dot che dot wisc dot edu  Wed Oct 21 19:45:20 1998
Subject: eig() on symmetric matrices
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Roman Grigoriev <roman at control dot uchicago dot edu>
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Wed, 21 Oct 1998 19:40:40 -0500 (CDT)

On 21-Oct-1998, Roman Grigoriev <roman at control dot uchicago dot edu> wrote:

| To: bug-octave at bevo dot che dot wisc dot edu
| Cc: roman
| Subject: eig() on symmetric matrices
| 
| Bug report for Octave 2.0.13 configured for i386-pc-linux-gnu
| 
| Description:
| -----------
| 
| Calling eig() for any symmetric (e.g. unit) matrix causes segmentation fault.
| 
| Repeat-By:
| ---------
| 
| > eig(eye(2));

Hmm.  I can't duplicate this.  Here's what I get:

  $ octave
  Octave, version 2.0.13 (i686-pc-linux-gnulibc1).
  Copyright (C) 1996, 1997, 1998 John W. Eaton.
  This is free software with ABSOLUTELY NO WARRANTY.
  For details, type `warranty'.

  octave:1> eig (eye (2))
  ans =

    1
    1

  octave:2>

| C compiler:       egcc, version 2.7.2.3
| CFLAGS:           -DHAVE_CONFIG_H -mieee-fp -O2 -fomit-frame-pointer
| CPICFLAG:         -fPIC
| C++ compiler:     c++, version 2.90.29 980515 (egcs-1.0.3 release)

Can you please try rebuilding Octave with the current egcs release and
tell me if you still have the same problem?

Thanks,

jwe