Re: segfault in eig()

[A Scottedward Hodel]

Here's what I get (old version, sorry):

GNU Octave, version 2.1.24 (powerpc-apple-machten4).

octave:1>  eig([1 1 1; 1 2 3; 1 3 6])
ans =

  0.12702
  1.00000
  7.87298

It would probably be a good idea to get a backtrace from gdb to
isolate where the seg fault occurs.

At 11:00 AM +0100 7/20/00, Paul Kienzle wrote:
> To: address@hidden
> Cc: pkienzle
> Subject: segfault in eig()
>
> Bug report for Octave 2.0.16.91 configured for i386-pc-linux-gnu
>
> Description:
> -----------
>
>   eig() is seg-faulting for some inputs.
>
> Repeat-By:
> ---------
>
> octave:2> eig(rand(3))
> ans =
>
>    0.18953
>    1.72461
>   -0.35627
>
> octave:3> eig([1 1 1; 1 2 3; 1 3 6])
> error: Segmentation fault -- stopping myself...
> attempting to save variables to `octave-core'...
> save to `octave-core' complete
>
> Segmentation fault
>
>
> Configuration (please do not edit this section):
> -----------------------------------------------
>
> uname output:     Linux kienzle 2.0.34 #3 Fri Oct 9 23:37:16 BST 
> 1998 i586 unknown
> configure opts:   --prefix=/usr --datadir=/usr/share 
> --libdir=/usr/lib --libexecdir=/usr/lib --infodir=/usr/share/info 
> --mandir=/usr/share/man --with-g77 --enable-dl --enable-shared 
> --enable-lite-kernel --host i386-linux
> Fortran compiler: g77
> FFLAGS:           -O2
> F2C:             
> F2CFLAGS:        
> FLIBS:            -L/usr/lib/gcc-lib/i486-linux/egcs-2.90.29 -lf2c -lm
> CPPFLAGS:        
> INCFLAGS:         -I/usr/include/octave-2.0.16.91 
> -I/usr/include/octave-2.0.16.91/octave -I/usr/include
> C compiler:       gcc, version 2.7.2.3
> CFLAGS:           -DHAVE_CONFIG_H -mieee-fp -O2
> CPICFLAG:         -fPIC
> C++ compiler:     c++, version 2.90.29 980515 (egcs-1.0.3 release)
> CXXFLAGS:         -DHAVE_CONFIG_H -mieee-fp -fno-rtti 
> -fno-exceptions -fno-implicit-templates -O2
> CXXPICFLAG:       -fPIC
> LDFLAGS:          -s
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> RLD_FLAG:         -Xlinker -rpath -Xlinker /usr/lib/octave-2.0.16.91
> TERMLIBS:         -lncurses
> LIBS:            
> LEXLIB:          
> LIBPLPLOT:       
> LIBDLFCN:        
> DEFS:
>
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>
> User-preferences (please do not edit this section):
> --------------------------------------------------
>
>   EDITOR = "vi"
>   EXEC_PATH = 
> "/home/pkienzle/octave/audio::/scratch/programs/audio/package/pipewave.1.3/bin:/scratch/programs/audio/pitch/POWERpv1.1G/bin:/home/pkienzle/pantome/bin:/home/pkienzle/sfs/bin:/scratch/usr/bin:/home/pkienzle/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/usr/games"
>   IMAGEPATH = ".:/usr/share/octave/2.0.16.91/imagelib//"
>   INFO_FILE = "/usr/share/info/octave.info"
>   INFO_PROGRAM = "info"
>   LOADPATH = "/home/pkienzle/matcompat//:/home/pkienzle/octave//::"
>   PAGER = "less"
>   PS1 = "\\s:\\#> "
>   PS2 = "> "
>   PS4 = "+ "
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> # default_global_variable_value = <no value or error in displaying it>
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>   max_recursion_depth = 256
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>   warn_variable_switch_label = 0
>   whitespace_in_literal_matrix =

--
A S Hodel Assoc. Prof. Dept Elect and Computer Eng, Auburn Univ,AL 36849-5201
On leave at NASA Marshall Space Flight Center (256) 544-1426
Address until 31 July 2000:Mail Code TD-55, MSFC, Alabama, 35812
http://www.eng.auburn.edu/~scotte