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Back trace:

#0  PyTuple_Pack (n=0x3) at Objects/tupleobject.c:149
#1  0xa7b92024 in Instance_New (cls=0xa7bba064, 
args=0xa7c1a43c) 
at /var/tmp/pisi/python-2.4.3-14/work/Python-2.4.3/Modules/cPickle.c:3637
#2  0xa7b93798 in load (self=0xa7c0a80c) 
at /var/tmp/pisi/python-2.4.3-14/work/Python-2.4.3/Modules/cPickle.c:4389
#3  0xa7b953c8 in cpm_loads (self=0x0, args=0x0) 
at /var/tmp/pisi/python-2.4.3-14/work/Python-2.4.3/Modules/cPickle.c:5481
#4  0xa7ec4d97 in PyCFunction_Call (func=0xa7bc9b0c, 
arg=0xa7bc9cec, kw=0x0) at Objects/methodobject.c:108
#5  0xa7efe3d8 in PyEval_EvalFrame (f=0x807e4bc) at 
Python/ceval.c:3563
#6  0xa7f00bb3 in PyEval_EvalCodeEx (co=0xa7bbda60, 
globals=0x0, locals=0x0, args=0xa7bbda60, argcount=0x0, 
kws=0x0, kwcount=0x0, defs=0x0, defcount=0x0, 
closure=0x0) at Python/ceval.c:2736
#7  0xa7f00e35 in PyEval_EvalCode (co=0x0, globals=0x0, 
locals=0x0) at Python/ceval.c:484
#8  0xa7f1ba98 in run_node (n=0xa7bfbe18, filename=0x0, 
globals=0x0, locals=0x0, flags=0x0) at 
Python/pythonrun.c:1265
#9  0xa7f1ce28 in PyRun_SimpleFileExFlags (fp=0x804a008, 
filename=0xaf9ab3b9 "picklefault.py", closeit=0x1, 
flags=0xaf9aafe8) at Python/pythonrun.c:860
#10 0xa7f1d9aa in PyRun_AnyFileExFlags (fp=0x804a008, 
filename=0xaf9ab3b9 "picklefault.py", closeit=0x1, 
flags=0xaf9aafe8) at Python/pythonrun.c:664
#11 0xa7f238d0 in Py_Main (argc=0x1, argv=0xaf9aafe8) at 
Modules/main.c:493
#12 0x0804867a in main (argc=0x0, argv=0x0) at 
Modules/python.c:23