diff --git a/jedi/cache.py b/jedi/cache.py
index 20805845..2b671700 100644
--- a/jedi/cache.py
+++ b/jedi/cache.py
@@ -21,6 +21,7 @@ from __future__ import with_statement
 import time
 import os
 import sys
+import hashlib
 try:
     import cPickle as pickle
 except:
@@ -312,7 +313,7 @@ class _ModulePickling(object):
         shutil.rmtree(self._cache_directory())
 
     def _get_hashed_path(self, path):
-        return self._get_path('%s.pkl' % hash(path))
+        return self._get_path('%s.pkl' % hashlib.md5(path.encode("utf-8")).hexdigest())
 
     def _get_path(self, file):
         dir = self._cache_directory()
diff --git a/jedi/parsing_representation.py b/jedi/parsing_representation.py
index 65210124..d1ea83ff 100644
--- a/jedi/parsing_representation.py
+++ b/jedi/parsing_representation.py
@@ -560,7 +560,7 @@ class Flow(Scope):
     @parent.setter
     def parent(self, value):
         self._parent = value
-        if self.next:
+        if hasattr(self, "next") and self.next:
             self.next.parent = value
 
     def get_code(self, first_indent=False, indention='    '):