failing test for ticket #583

tests/bugs.txt

@@ -16,6 +16,7 @@ with_statement_module_level_T536
 function_as_method_T494
 closure_inside_cdef_T554
 ipow_crash_T562
+pure_mode_cmethod_inheritance_T583
 
 
 # CPython regression tests that don't current work:

tests/run/pure_mode_cmethod_inheritance_T583.pxd

+cdef class Base:
+    cpdef str method(self)
+
+cdef class Derived(Base):
+    cpdef str method(self)

tests/run/pure_mode_cmethod_inheritance_T583.py

+class Base(object):
+    '''
+    >>> base = Base()
+    >>> print(base.method())
+    Base
+    '''
+    def method(self):
+        return "Base"
+
+
+class Derived(Base):
+    '''
+    >>> derived = Derived()
+    >>> print(derived.method())
+    Derived
+    '''
+    def method(self):
+        return "Derived"