Bug#344281: [Pkg-octave-devel] Bug#344281: panic: Illegal instruction in det(eye(x))

[Dirk Eddelbuettel]

On 21 December 2005 at 20:18, joshua at nirmalvihar.info wrote:
| Package: octave2.9
| Version: 2.9.4-8
| Severity: normal
| 
| I tried to octave2.1 also, det(eye(9)) gives a panic: Illegal
| instruction.  det(eye(4)), 5, 6, 7, 8 works though.  It's a mystery.

I very vaguely recall a bug report with respect to Lapack that came up in R
that was triggered by one matrix size only. If memory serves, it was 9 as
well. This is the reason we build R with its own copy of Lapack. 

I cannot recall what the exact circumstances were, but maybe Doug or Brian
(CC'ed) can remember ?

Regards, Dirk
| 
| -- System Information:
| Debian Release: 3.0
|   APT prefers testing
|   APT policy: (500, 'testing')
| Architecture: i386 (i686)
| Kernel: Linux 2.6.14-b1
| Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8
| 
| Versions of packages octave2.9 depends on:
| ii  atlas3-base [liblapack.so.3]  3.6.0-19   Automatically Tuned Linear Algebra
| ii  fftw3                         3.0.1-11   Library for computing Fast Fourier
| ii  libc6                         2.3.5-3    GNU C Library: Shared libraries an
| ii  libgcc1                       1:4.0.2-5  GCC support library
| ii  libgfortran0                  4.0.2-5    Runtime library for GNU Fortran ap
| ii  libglpk0                      4.8-3      linear programming kit (shared lib
| ii  libhdf5-serial-1.6.4-0c2 [lib 1.6.4-4    Hierarchical Data Format 5 (HDF5) 
| ii  libncurses5                   5.4-9      Shared libraries for terminal hand
| ii  libreadline5                  5.0-10     GNU readline and history libraries
| ii  libstdc++6                    4.0.2-5    The GNU Standard C++ Library v3
| ii  libumfpack4                   4.4-3      set of routines for solving unsymm
| ii  texinfo                       4.6-1      Documentation system for on-line i
| ii  zlib1g                        1:1.2.2-8  compression library - runtime
| 
| -- no debconf information
| 
| 
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