seems like the explicit deepcopy helpers in the control flow state objects are...

seems like the explicit deepcopy helpers in the control flow state objects are no longer needed but crash the compiler due to infinite recursion

Cython/Compiler/FlowControl.py

@@ -3,11 +3,11 @@ from __future__ import absolute_import
 import cython
 cython.declare(PyrexTypes=object, ExprNodes=object, Nodes=object,
                Builtin=object, InternalError=object,
-               error=object, warning=object, deepcopy=object,
+               error=object, warning=object, deepcopy=object, copy=object,
                py_object_type=object, unspecified_type=object,
                object_expr=object, fake_rhs_expr=object, TypedExprNode=object)
 
-from copy import deepcopy
+from copy import deepcopy, copy
 
 from . import Builtin
 from . import ExprNodes
@@ -328,17 +328,6 @@ class NameAssignment(object):
         self.is_deletion = False
         self.inferred_type = None
 
-    def __deepcopy__(self, memo):
-        ass = NameAssignment.__new__(type(self))
-        ass.lhs = deepcopy(self.lhs, memo)
-        ass.rhs = deepcopy(self.rhs, memo)
-        ass.entry = self.entry
-        ass.refs = deepcopy(self.refs, memo)
-        ass.is_arg = self.is_arg
-        ass.is_deletion = self.is_deletion
-        ass.inferred_type = self.inferred_type
-        return ass
-
     def __repr__(self):
         return '%s(entry=%r)' % (self.__class__.__name__, self.entry)
 
@@ -413,13 +402,6 @@ class NameReference(object):
     def __repr__(self):
         return '%s(entry=%r)' % (self.__class__.__name__, self.entry)
 
-    def __deepcopy__(self, memo):
-        ref = NameReference.__new__(type(self))
-        ref.node = deepcopy(self.node, memo)
-        ref.entry = self.entry
-        ref.pos = self.node.pos
-        return ref
-
 
 class ControlFlowState(list):
     # Keeps track of Node's entry assignments