pythonic backtrace with gdb

[Hynek Hanke]

Hello,

please, I'm trying to obtain a pythonic backtrace via gdb to be able to 
debug deadlock situations in a multi-threaded program by attaching to 
the running process.

I'm running the program under python2.4-dbg, When I try to load the 
.gdbinit script obtained at http://wiki.python.org/moin/DebuggingWithGdb 
, gdb crashes however with the following error (full session listing):

(gdb) attach 10753
Attaching to program: /usr/bin/python, process 10753
warning: no loadable sections found in added symbol-file system-supplied 
DSO at 0x7fff575fd000
0x00002b33537177fb in ?? () from /lib64/ld-linux-x86-64.so.2
(gdb) pystack
/tmp/buildd/gdb-6.6.dfsg.90.20070912/gdb/regcache.c:164: internal-error: 
register_type: Assertion `regnum >= 0 && regnum < 
descr->nr_cooked_registers' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) [answered Y; input not from terminal]
/tmp/buildd/gdb-6.6.dfsg.90.20070912/gdb/regcache.c:164: internal-error: 
register_type: Assertion `regnum >= 0 && regnum < 
descr->nr_cooked_registers' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) [answered Y; input not from terminal]
Neúspěšně ukončen (SIGABRT)

I've also tried to use the backtrace script here
http://mashebali.com/?Python_GDB_macros:The_Macros:Backtrace
But I get a different error:
(gdb) pbt
Invalid type combination in ordering comparison.

I'm using GDB version 6.6.90.

Could you please suggest what can I do to be able to get the backtrace?

Thank you,
Hynek Hanke