Fix python 3 deepcopy & sorting compatiblity

1 files changed, 6 insertions, 0 deletions

diff --git a/Cython/Compiler/StringEncoding.py b/Cython/Compiler/StringEncoding.py
index fb87d4ae9..1ca490efc 100644
--- a/Cython/Compiler/StringEncoding.py
+++ b/Cython/Compiler/StringEncoding.py
@@ -115,6 +115,9 @@ class EncodedString(_unicode):
     # otherwise
     encoding = None
 
+    def __deepcopy__(self, memo):
+        return self
+
     def byteencode(self):
         assert self.encoding is not None
         return self.encode(self.encoding)
@@ -131,6 +134,9 @@ class BytesLiteral(_bytes):
     # bytes subclass that is compatible with EncodedString
     encoding = None
 
+    def __deepcopy__(self, memo):
+        return self
+
     def byteencode(self):
         if IS_PYTHON3:
             return _bytes(self)