Use unicode sys paths always

jedi/evaluate/compiled/access.py

@@ -153,6 +153,15 @@ class AccessPath(object):
     def __init__(self, accesses):
         self.accesses = accesses
 
+    # Writing both of these methods here looks a bit ridiculous. However with
+    # the differences of Python 2/3 it's actually necessary, because we will
+    # otherwise have a accesses attribute that is bytes instead of unicode.
+    def __getstate__(self):
+        return self.accesses
+
+    def __setstate__(self, value):
+        self.accesses = value
+
 
 def create_access_path(evaluator, obj):
     access = create_access(evaluator, obj)