[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Octave-bug-tracker] [bug #32401] failed check of onenormest
From: |
Larry Doolittle |
Subject: |
[Octave-bug-tracker] [bug #32401] failed check of onenormest |
Date: |
Wed, 09 Feb 2011 23:46:19 +0000 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.16) Gecko/20110107 Iceweasel/3.5.16 (like Firefox/3.5.16) |
Follow-up Comment #1, bug #32401 (project octave):
On the same system, three other self-tests fail: sparse/pcg.m sparse/pcr.m
special-matrix/hadamard.m
I can't confirm these failures are related, but they do have the same symptom
"panic: Illegal instruction -- stopping myself..."
I could isolate these faults to a self-contained handful
of lines. There are two. Notably, these snippets also crash octave-3.2.
---
# crash taken from scripts/sparse/pcg.m
# N<64 doesn't crash octave-3.2 or octave-3.4
N = 64;
A = zeros (N, N);
for i=1 : N - 1 # form 1-D Laplacian matrix
A (i:i+1, i:i+1) = [2 -1; -1 2];
endfor
b = rand (N, 1);
X = A b;
---
# crash adapted from scripts/special-matrix/hadamard.m
# also crashes with n=32
n=48;
h=hadamard(n);
size(h)
norm(h*h'-n*eye(n))
---
Hope this helps.
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?32401>
_______________________________________________
Message sent via/by Savannah
http://savannah.gnu.org/