Ticket #241, better error for keywords in cdef functions.

Cython/Compiler/ExprNodes.py

@@ -2527,7 +2527,11 @@ class GeneralCallNode(CallNode):
             self.keyword_args.analyse_types(env)
         if self.starstar_arg:
             self.starstar_arg.analyse_types(env)
-        self.function = self.function.coerce_to_pyobject(env)
+        if self.function.type is not py_object_type:
+            if hasattr(self.function, 'entry') and not self.function.entry.as_variable:
+                error(self.pos, "Keyword arguments not allowed in cdef functions.")
+            else:
+                self.function = self.function.coerce_to_pyobject(env)
         self.positional_args = \
             self.positional_args.coerce_to_pyobject(env)
         if self.starstar_arg:

tests/errors/e_cdef_keywords_T241.pyx

+cdef some_function(x, y):
+    pass
+
+cdef class A:
+    cdef some_method(self, x, y=1):
+        pass
+
+some_function(1, 2)
+some_function(1, y=2)
+
+cdef A a = A()
+a.some_method(1)
+a.some_method(1, 2)
+a.some_method(1, y=2)
+
+_ERRORS = u"""
+:9:13: Keyword arguments not allowed in cdef functions.
+:14:13: Keyword arguments not allowed in cdef functions.
+"""