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[Octave-bug-tracker] [bug #35068] octave segfaults when running test fun
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #35068] octave segfaults when running test functions |
Date: |
Wed, 14 Dec 2011 09:14:05 +0000 |
User-agent: |
Opera/9.80 (X11; Linux i686; U; en) Presto/2.7.62 Version/11.00 |
URL:
<http://savannah.gnu.org/bugs/?35068>
Summary: octave segfaults when running test functions
Project: GNU Octave
Submitted by: None
Submitted on: Wed 14 Dec 2011 09:14:04 AM UTC
Category: Interpreter
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Crash
Status: None
Assigned to: None
Originator Name: Josef Leydold
Originator Email: address@hidden
Open/Closed: Open
Discussion Lock: Any
Release: 3.4.3
Operating System: GNU/Linux
_______________________________________________________
Details:
Suppose one has the following test file 'testbug' that just contains the
following two lines:
%!test
%! function retval= myfunct(x) retval = exp(-x.*x); endfunction
and runs this test three times, e.g., by means of the following script
'testbug.m' using 'octave testbug.m'
from the command line:
test testbug verbose
test testbug verbose
test testbug verbose
Then octave crashes with a segfault:
$ octave testbug.m
GNU Octave, version 3.4.3
Copyright (C) 2011 John W. Eaton and others.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. For details, type `warranty'.
Octave was configured for "x86_64-pc-linux-gnu".
Additional information about Octave is available at http://www.octave.org.
Please contribute if you find this software useful.
For more information, visit http://www.octave.org/help-wanted.html
Read http://www.octave.org/bugs.html to learn how to submit bug reports.
For information about changes from previous versions, type `news'.
>>>>> /home/leydold/svn/anuran/octave/bug/testbug
***** test
function retval= myfunct(x) retval = exp(-x.*x); endfunction
PASSES 1 out of 1 tests
>>>>> /home/leydold/svn/anuran/octave/bug/testbug
***** test
function retval= myfunct(x) retval = exp(-x.*x); endfunction
PASSES 1 out of 1 tests
>>>>> /home/leydold/svn/anuran/octave/bug/testbug
***** test
function retval= myfunct(x) retval = exp(-x.*x); endfunction
panic: Segmentation fault -- stopping myself...
Segmentation fault
When running octave with valgrind I get the following error report:
==2861== 1 errors in context 1 of 3606:
==2861== Jump to the invalid address stated on the next line
==2861== at 0x0: ???
==2861== by 0x52ED6DC: finish_function(tree_parameter_list*,
octave_user_function*, octave_comment_list*) (in
/usr/lib64/octave/3.4.3/liboctinterp.so.0.0.0)
==2861== by 0x52F4CD2: octave_parse() (in
/usr/lib64/octave/3.4.3/liboctinterp.so.0.0.0)
[ stuff deleted ]
==2861== Address 0x0 is not stack'd, malloc'd or (recently) free'd
I guess that octave accidently has freed a function pointer and set it to NULL
and then tried to call the function.
I am new to octave so I know too little about the internal structures of
octave so I cannot trace down the error.
The call stack before the crash lists functions like
'tree_evaluator::visit_statement' so it happens somewhere in the parse tree of
the interpreter.
Josef
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?35068>
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