prevent recursively generated Cython utility code (i.e. used by other Cython...

prevent recursively generated Cython utility code (i.e. used by other Cython utility code) from appearing multiple times in the output due to a different outer module scope

Cython/Compiler/UtilityCode.py

@@ -94,7 +94,10 @@ class CythonUtilityCode(Code.UtilityCodeBase):
             return False
 
     def _equality_params(self):
-        return self.impl, self.outer_module_scope, self.compiler_directives
+        outer_scope = self.outer_module_scope
+        while isinstance(outer_scope, NonManglingModuleScope):
+            outer_scope = outer_scope.outer_scope
+        return self.impl, outer_scope, self.compiler_directives
 
     def __hash__(self):
         return hash(self.impl)