Octave 2.9.4 - random crashes on debian/sid

[LUK ShunTim]

Hello,

I'm experiencing random crashes of octave 2.9.4 on a debian/sid box. I
apt-get the source and rebuild with debug on and here is the backtrace.
>From my limited knowledge, it looks like a problem in octave itself.

<backtrace>

$ gdb octave
GNU gdb 6.4-debian
Copyright 2005 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 "i486-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".

(gdb) run
Starting program: /usr/bin/octave
(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)
[Thread debugging using libthread_db enabled]
[New Thread -1243625792 (LWP 19541)]
GNU Octave, version 2.9.4 (i486-pc-linux-gnu).
Copyright (C) 2005 John W. Eaton.
This is free software; see the source code for copying conditions.
There is ABSOLUTELY NO WARRANTY; not even for MERCHANTIBILITY or
FITNESS FOR A PARTICULAR PURPOSE.  For details, type `warranty'.

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

Report bugs to <address@hidden> (but first, please read
http://www.octave.org/bugs.html to learn how to write a helpful report).


Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1243625792 (LWP 19541)]
0xb5a125b0 in ?? ()
(gdb) thread apply all bt

Thread 1 (Thread -1243625792 (LWP 19541)):
#0  0xb5a125b0 in ?? ()
#1  0xb7b3b38d in octave_builtin::do_multi_index_op ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#2  0xb7b3ace0 in octave_builtin::subsref ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#3  0xb7b0bdf7 in octave_value::subsref ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#4  0xb7c26846 in tree_index_expression::rvalue ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#5  0xb7c43b72 in tree_statement::eval ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#6  0xb7c43fb0 in tree_statement_list::eval ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#7  0xb7a0e0d8 in parse_and_execute ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#8  0xb7a0e6c1 in parse_and_execute ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#9  0xb7a0ed6e in source_file () from /usr/lib/octave-2.9.4/liboctinterp.so
#10 0xb790bc77 in maybe_add_default_load_path ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#11 0xb790c7f9 in execute_default_pkg_add_files ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib/octave-2.9.4/liboctinterp.so
#12 0xb790cfb9 in execute_default_pkg_add_files ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#13 0xb79fde9b in octave_lvalue::assign ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#14 0xb7c12a56 in tree_simple_assignment::rvalue ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#15 0xb7c12312 in tree_simple_assignment::rvalue ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#16 0xb7c43b72 in tree_statement::eval ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#17 0xb7c43fb0 in tree_statement_list::eval ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#18 0xb7a0e0d8 in parse_and_execute ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#19 0xb7a0fd59 in parse_and_execute ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#20 0xb7e24661 in std::_Rb_tree<std::string, std::pair<std::string
const, int>, std::_Select1st<std::pair<std::string const, int> >,
std::less<std::string>, std::allocator<std::pair<std::string const, int>
> >::insert_unique ()
   from /usr/lib/octave-2.9.4/liboctinterp.so
#21 0xb7e27545 in octave_main () from /usr/lib/octave-2.9.4/liboctinterp.so
#22 0x08048674 in main ()
(gdb) quit
The program is running.  Exit anyway? (y or n) y

</backtrace>

Regards,
ST
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