#0  0x0000000000464bf4 in PyDict_SetItem (op=op@entry=<unknown at remote 0xd572a0>, key=key@entry='_USBTransfer__submitted', value=value@entry=False) at ../Objects/dictobject.c:802
#1  0x000000000046d87c in _PyObject_GenericSetAttrWithDict (obj=obj@entry=<USBTransfer at remote 0xb3a950>, name='_USBTransfer__submitted', value=value@entry=False, dict=<unknown at remote 0xd572a0>, dict@entry=0x0)
    at ../Objects/object.c:1524
#2  0x000000000046dacc in PyObject_GenericSetAttr (value=False, name=<optimized out>, obj=<USBTransfer at remote 0xb3a950>) at ../Objects/object.c:1554
#3  PyObject_SetAttr (v=v@entry=<USBTransfer at remote 0xb3a950>, name='_USBTransfer__submitted', value=value@entry=False) at ../Objects/object.c:1242
#4  0x00000000004ab676 in PyEval_EvalFrameEx (f=f@entry=
    Frame 0xdd7810, for file /home/vincent/git/python-libusb1/usb1.py, line 192, in __callbackWrapper (self=<USBTransfer at remote 0xb3a950>, transfer_p=<LP_libusb_transfer at remote 0xc027a0>), throwflag=throwflag@entry=0)
    at ../Python/ceval.c:2004
#5  0x00000000004b2dc8 in PyEval_EvalCodeEx (co=<optimized out>, globals=<optimized out>, locals=locals@entry=0x0, args=<optimized out>, argcount=<optimized out>, kws=kws@entry=0x0, kwcount=kwcount@entry=0, defs=defs@entry=0x0,
    defcount=defcount@entry=0, closure=0x0) at ../Python/ceval.c:3253
#6  0x00000000004b39fc in function_call.15272 (func=<function at remote 0xaad398>, arg=<optimized out>, kw=<optimized out>) at ../Objects/funcobject.c:526
#7  0x000000000046e1f4 in PyObject_Call (kw=0x0, arg=(<USBTransfer at remote 0xb3a950>, <LP_libusb_transfer at remote 0xc027a0>), func=<function at remote 0xaad398>) at ../Objects/abstract.c:2529
#8  instancemethod_call.8745 (func=<function at remote 0xaad398>, arg=(<USBTransfer at remote 0xb3a950>, <LP_libusb_transfer at remote 0xc027a0>), kw=0x0) at ../Objects/classobject.c:2602
#9  0x00000000004602fe in PyObject_Call (kw=<optimized out>, arg=(<LP_libusb_transfer at remote 0xc027a0>,), func=<instancemethod at remote 0xb31e60>) at ../Objects/abstract.c:2529
#10 PyEval_CallObjectWithKeywords (func=<instancemethod at remote 0xb31e60>, arg=(<LP_libusb_transfer at remote 0xc027a0>,), kw=<optimized out>) at ../Python/ceval.c:3890