Fix bad self argument crash in cpdef methods (#165)

--HG--
rename : tests/bugs/missing_self_in_cpdef_method_T165.pyx => tests/errors/missing_self_in_cpdef_method_T165.pyx

Cython/Compiler/Nodes.py

@@ -1337,7 +1337,12 @@ class CFuncDefNode(FuncDefNode):
         self.entry.inline_func_in_pxd = self.inline_in_pxd
         self.return_type = type.return_type
         
-        if self.overridable and len(self.args) > 0:
+        if self.overridable and not env.is_module_scope:
+            if len(self.args) < 1 or not self.args[0].type.is_pyobject:
+                # An error will be produced in the cdef function
+                self.overridable = False
+            
+        if self.overridable:
             import ExprNodes
             py_func_body = self.call_self_node(is_module_scope = env.is_module_scope)
             self.py_func = DefNode(pos = self.pos, 

tests/bugs/missing_self_in_cpdef_method_T165.pyx → tests/errors/missing_self_in_cpdef_method_T165.pyx

@@ -3,3 +3,6 @@ cdef class A:
     cpdef a(int not_self):
         pass
 
+_ERRORS = u"""
+3:10: Self argument (int) of C method 'a' does not match parent type (A)
+"""