[Pkg-octave-devel] Bug#423278: octave2.9: Floating point exception with core dump

[Kumar Appaiah]

Package: octave2.9
Version: 2.9.9-8etch1
Severity: important

There is a floating point exception, followed by a core dump for the following 
(representative) code:
Mt = 2;
Mr = 2;
N = 4;

G = zeros(N,2);
h_f = fft(G(1:Mr:(N-16-1)*Mr+1,1));

This should actually run, or produce an error (since N - 16 is
negative). The core dump promptly disappears when N is made 17 or
more.

The messages from octave are like this:
panic: Floating point exception -- stopping myself...
attempting to save variables to `octave-core'...
save to `octave-core' complete
Floating point exception

Should you require more information, please do inform me. Thanks.

Kumar
-- System Information:
Debian Release: 4.0
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.21.1
Locale: LANG=, LC_CTYPE= (charmap=ANSI_X3.4-1968)

Versions of packages octave2.9 depends on:
ii  atlas3-base [liblapack.s 3.6.0-20.6      Automatically Tuned Linear Algebra
ii  fftw3                    3.1.2-1         library for computing Fast Fourier
ii  lapack3 [liblapack.so.3] 3.0.20000531a-6 library of linear algebra routines
ii  libc6                    2.3.6.ds1-13    GNU C Library: Shared libraries
ii  libgcc1                  1:4.1.1-21      GCC support library
ii  libgfortran1             4.1.1-21        Runtime library for GNU Fortran ap
ii  libglpk0                 4.11-2          linear programming kit (shared lib
ii  libhdf5-serial-1.6.5-0 [ 1.6.5-3         Hierarchical Data Format 5 (HDF5) 
ii  libncurses5              5.5-5           Shared libraries for terminal hand
ii  libpcre3                 6.7-1           Perl 5 Compatible Regular Expressi
ii  libreadline5             5.2-2           GNU readline and history libraries
ii  libstdc++6               4.1.1-21        The GNU Standard C++ Library v3
ii  libufsparse              1.2-7           collection of libraries for comput
ii  refblas3 [libblas.so.3]  1.2-8           Basic Linear Algebra Subroutines 3
ii  texinfo                  4.8.dfsg.1-4    Documentation system for on-line i
ii  zlib1g                   1:1.2.3-13      compression library - runtime

octave2.9 recommends no packages.

-- no debconf information

-- 
Kumar Appaiah
462, Jamuna Hostel,
Indian Institute of Technology Madras,
Chennai - 600036