On 11/23/06, Nils Wagner <nwagner@[...].de>  wrote:
>  Hi all,
> 
>  Can someone reproduce the segfault by running the following test

I can confirm a segfault using:

Python 2.4.4c1 (#2, Oct 11 2006, 20:00:03)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
> >> import scipy, numpy
s> >> scipy.__version__, numpy.__version__
('0.5.2.dev2322', '1.0.1.dev3435')

HTH

Tim

> 
>  from scipy import *
> 
>  n = 15
>  A = sparse.lil_matrix((n,n))
>  for i in arange(0,n):
>    A[i,:n] = random.rand(n)
>  B = 2.*sparse.speye(n,n)
>  sigma =  1.0
>  sigma_solve = linsolve.splu(A - sigma*B).solve
> 
> 
>  Nils
> 
>  I am using the latest svn versions of numpy/scipy.
>  This is the output of gdb
> 
>  GNU gdb 6.3
>  Copyright 2004 Free Software Foundation, Inc.
>  GDB is free software, covered by the GNU General Public License, and you are
>  welcome to change it and/or distribute copies of it under certain
>  conditions.
>  Type "show copying" to see the conditions.
>  There is absolutely no warranty for GDB.  Type "show warranty" for details.
>  This GDB was configured as "x86_64-suse-linux"...(no debugging symbols
>  found)
>  Using host libthread_db library "/lib64/tls/libthread_db.so.1".
> 
>  (gdb) run test_linsolve.py
>  Starting program: /usr/bin/python test_linsolve.py
>  (no debugging symbols found)
>  (no debugging symbols found)
>  [Thread debugging using libthread_db enabled]
>  [New Thread 46912509653888 (LWP 6613)]
>  (no debugging symbols found)
>  (no debugging symbols found)
>  (no debugging symbols found)
>  (no debugging symbols found)
>  (no debugging symbols found)
>  (no debugging symbols found)
>  (no debugging symbols found)
>  (no debugging symbols found)
>  (no debugging symbols found)
>  Use minimum degree ordering on A'+A.
> 
>  Program received signal SIGSEGV, Segmentation fault.
>  [Switching to Thread 46912509653888 (LWP 6613)]
>  0x00002aaab0e6e9a1 in genmmd_ (neqns=0x7fffffa847ac, xadj=0x8d6d60,
>  adjncy=0x998550, invp=0x8e19ec, perm=0x88cb20, delta=0x7fffffa847a4,
>      dhead=0x8e196c, qsize=0x8e6040, llist=0x92bcbc, marker=0x94c78c,
>  maxint=0x7fffffa847a0, nofsub=0x7fffffa8479c) at mmd.c:162
>  162             perm[nextmd] = -mdeg;
> 
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