#0  0xb7b0220a in bind_fn (obj=0xb7d665b4, ch=63, key=0) at pytx.c:140
140       Py_DECREF(result);
(gdb) bt
#0  0xb7b0220a in bind_fn (obj=0xb7d665b4, ch=63, key=0) at pytx.c:140
#1  0xb7b00849 in tx_list_operate (obj=0xb7d665b4, key=63) at txlist.c:242
#2  0xb7affc1e in tx_obj_operate (obj=0xb7d665b4) at txobj.c:132
#3  0xb7b0305b in PyTX_operate (self=0x0) at pytx.c:575
#4  0x080b9495 in PyEval_EvalFrame (f=0x8183554) at ../Python/ceval.c:3568
#5  0x080b9224 in PyEval_EvalFrame (f=0x8153d44) at ../Python/ceval.c:3651
#6  0x080ba765 in PyEval_EvalCodeEx (co=0xb7d250a0, globals=0xb7d61824, locals=0xb7d61824, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0,
    closure=0x0) at ../Python/ceval.c:2741
#7  0x080ba7c9 in PyEval_EvalCode (co=0xb7d250a0, globals=0xb7d61824, locals=0xb7d61824) at ../Python/ceval.c:484
#8  0x080dd167 in PyRun_FileExFlags (fp=0x8146008, filename=0xbfd4f613 "./test.py", start=257, globals=0xb7d61824, locals=0xb7d61824, closeit=1,
    flags=0xbfd4de94) at ../Python/pythonrun.c:1285
#9  0x080dd364 in PyRun_SimpleFileExFlags (fp=0x8146008, filename=0xbfd4f613 "./test.py", closeit=1, flags=0xbfd4de94) at ../Python/pythonrun.c:869
#10 0x08055ba8 in Py_Main (argc=1, argv=0xbfd4df64) at ../Modules/main.c:493
#11 0x08055032 in main (argc=1, argv=0x813a0c0) at ../Modules/python.c:23