From 551482898caae2dd18b14e55fffc4f363a5b78ad Mon Sep 17 00:00:00 2001
From: Erez Shinan <erezshin+git@gmail.com>
Date: Tue, 31 Oct 2017 12:08:13 +0200
Subject: [PATCH] Fix for earley__all_derivations = False

---
 lark/parsers/earley.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lark/parsers/earley.py b/lark/parsers/earley.py
index 180990f..7370a48 100644
--- a/lark/parsers/earley.py
+++ b/lark/parsers/earley.py
@@ -76,7 +76,9 @@ class Item(object):
 
 class Item_JoinDerivations(Item):
     __eq__ = Item.similar
-    __hash__ = Item.__hash__
+
+    def __hash__(self):
+        return hash((self.rule, self.ptr, id(self.start)))   # Always runs Derivation.__hash__
 
 
 class NewsList(list):