[Cython] @staticmethod decorator applied twice

[Jeroen Demeyer]

When investigating some issue with decorators, I noticed the following 
stange thing: it seems that the @staticmethod decorator is actually 
applied twice in some cases. For example, the testsuite file 
tests/run/static_methods.pyx contains the following code:

cdef class A:
     @staticmethod
     def static_def(int x):
         ...

The relevant part of the Cython-generated code:

   __pyx_t_1 = 
PyCFunction_NewEx(&__pyx_mdef_14static_methods_1A_1static_def, NULL, 
__pyx_n_s_static_methods);
...
PyTuple_SET_ITEM(__pyx_t_2, 0, __pyx_t_1);
   __pyx_t_1 = __Pyx_PyObject_Call(__pyx_builtin_staticmethod, 
__pyx_t_2, NULL);
...
   if (PyDict_SetItem((PyObject 
*)__pyx_ptype_14static_methods_A->tp_dict, __pyx_n_s_static_def, 
__pyx_t_1) < 0)
...
   __pyx_t_1 = __Pyx_GetNameInClass((PyObject 
*)__pyx_ptype_14static_methods_A, __pyx_n_s_static_def);
...
PyTuple_SET_ITEM(__pyx_t_2, 0, __pyx_t_1);
   __pyx_t_1 = __Pyx_PyObject_Call(__pyx_builtin_staticmethod, 
__pyx_t_2, NULL);
...
   if (PyDict_SetItem((PyObject 
*)__pyx_ptype_14static_methods_A->tp_dict, __pyx_n_s_static_def, 
__pyx_t_1) < 0)

I might be missing something, but this really looks like Cython is 
applying the @staticmethod decorator twice.