[SciPy-dev] ***[Possible UCE]*** Re: ***[Possible UCE]*** Re: Another segfault

Nils Wagner nwagner at mecha.uni-stuttgart.de
Fri Mar 3 16:52:52 CST 2006


On Fri, 03 Mar 2006 23:45:12 +0100
  "Nils Wagner" <nwagner at mecha.uni-stuttgart.de> wrote:
> On Fri, 03 Mar 2006 15:39:14 -0700
>  Travis Oliphant <oliphant at ee.byu.edu> wrote:
>> Nils Wagner wrote:
>> 
>>>  
>>>Travis,
>>>
>>>On a 32 bit machine I obtain with
>>>
>>>gdb --exec=python
>>>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 "i586-suse-linux".
>>>(gdb) r 
>>>/usr/local/lib/python2.4/site-packages/scipy/sparse/sparse.py
>>>Starting program: /usr/local/bin/python 
>>>/usr/local/lib/python2.4/site-packages/scipy/sparse/sparse.py
>>>
>>>snip
>>>Solve: single precision complex:
>>>Solve: double precision complex:
>>>  
>>>
>> 
>> I'm not sure what you are doing.  Is this just running 
>>Pyhthon?  
>> Presumably it is picking up some PYTHONSTARTUP file and 
>>running it.  
>> But, I have no idea what that is on your system.
>> 
>> Doing exactly what you do works for me.
>> 
>> What is actually being run to cause the segfault?
>>
>  python 
> /usr/local/lib/python2.4/site-packages/scipy/sparse/sparse.py
> 
>> What directory are you runing from? 
>> 
>> Have you re-built scipy after upgrading numpy?
> 
> Yes.
> Numpy version 0.9.6.2194
> Scipy version 0.4.7.1635
> 
> 
> Nils
> 
> 
>> 
>> -Travis
>> 
>> _______________________________________________
>> Scipy-dev mailing list
>> Scipy-dev at scipy.net
>> http://www.scipy.net/mailman/listinfo/scipy-dev
> 
>  
> 
> _______________________________________________
> Scipy-dev mailing list
> Scipy-dev at scipy.net
> http://www.scipy.net/mailman/listinfo/scipy-dev

Here is a backtrace (64 bit machine)

gdb python
r 
/usr/lib64/python2.4/site-packages/scipy/sparse/sparse.py


Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 10303)]
PyDict_DelItem (op=0x0, key=0x577378) at dictobject.c:579
579             if (!PyDict_Check(op)) {
(gdb) bt
#0  PyDict_DelItem (op=0x0, key=0x577378) at 
dictobject.c:579
#1  0x00002aaaae9f7bff in superlu_python_module_free 
(ptr=0x7fffffe424d0) at _superlu_utils.c:61
#2  0x00002aaaae9f75b2 in Py_cgssv (self=<value optimized 
out>, args=<value optimized out>,
     kwdict=<value optimized out>) at _csuperlumodule.c:99
#3  0x00002aaaaac5496a in PyEval_EvalFrame (f=0x53efd0) at 
ceval.c:3547
#4  0x00002aaaaac55404 in PyEval_EvalCodeEx 
(co=0x2aaaabbfe490, globals=<value optimized out>,
     locals=<value optimized out>, args=0x1, argcount=2, 
kws=0x506070, kwcount=0, defs=0x2aaaab903568,
     defcount=1, closure=0x0) at ceval.c:2730
#5  0x00002aaaaac53aba in PyEval_EvalFrame (f=0x505ed0) at 
ceval.c:3640
#6  0x00002aaaaac55404 in PyEval_EvalCodeEx 
(co=0x2aaaabbfe6c0, globals=<value optimized out>,
     locals=<value optimized out>, args=0x0, argcount=0, 
kws=0x0, kwcount=0, defs=0x0, defcount=0,
     closure=0x0) at ceval.c:2730
#7  0x00002aaaaac556d2 in PyEval_EvalCode (co=<value 
optimized out>, globals=<value optimized out>,
     locals=<value optimized out>) at ceval.c:484
#8  0x00002aaaaac70719 in run_node (n=<value optimized 
out>, filename=<value optimized out>,
     globals=0x503db0, locals=0x503db0, flags=<value 
optimized out>) at pythonrun.c:1265
#9  0x00002aaaaac71843 in PyRun_SimpleFileExFlags 
(fp=<value optimized out>,
     filename=0x7fffffe441c7 
"/usr/lib64/python2.4/site-packages/scipy/sparse/sparse.py", 
closeit=1,
     flags=0x7fffffe42b80) at pythonrun.c:860
#10 0x00002aaaaac77b25 in Py_Main (argc=<value optimized 
out>, argv=0x7fffffe42c28) at main.c:484
#11 0x00002aaaab603ced in __libc_start_main () from 
/lib64/libc.so.6
#12 0x00000000004006ea in _start () at start.S:113


Is this output useful ?

Nils





More information about the Scipy-dev mailing list