Fix CythonUtilityCode equality to avoid duplication.

Cython/Compiler/Nodes.py

@@ -1302,6 +1302,7 @@ class CVarDefNode(StatNode):
                 if 'staticmethod' in env.directives:
                     type.is_static_method = True
                 if create_extern_wrapper:
+                    self.entry.type.create_to_py_utility_code(env)
                     self.entry.create_wrapper = True
             else:
                 if self.directive_locals:

Cython/Compiler/UtilityCode.py

@@ -87,6 +87,18 @@ class CythonUtilityCode(Code.UtilityCodeBase):
         self.outer_module_scope = outer_module_scope
         self.compiler_directives = compiler_directives
 
+    def __eq__(self, other):
+        if isinstance(other, CythonUtilityCode):
+            return self._equality_params() == other._equality_params()
+        else:
+           return False
+
+    def _equality_params(self):
+        return self.impl, self.outer_module_scope, self.compiler_directives
+
+    def __hash__(self):
+        return hash(self.impl)
+
     def get_tree(self, entries_only=False, cython_scope=None):
         from .AnalysedTreeTransforms import AutoTestDictTransform
         # The AutoTestDictTransform creates the statement "__test__ = {}",

tests/run/cfunc_convert.pyx

@@ -8,13 +8,20 @@ from libc.math cimport sqrt
 cdef void empty_cfunc():
     print "here"
 
+# same signature
+cdef void another_empty_cfunc():
+    print "there"
+
 def call_empty_cfunc():
     """
     >>> call_empty_cfunc()
     here
+    there
     """
     cdef object py_func = empty_cfunc
     py_func()
+    cdef object another_py_func = another_empty_cfunc
+    another_py_func()
 
 
 cdef double square_c(double x):