From b501a27ad8ec4b531a9c1057952d8f7c6ef8cb77 Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Thu, 6 Aug 2015 22:15:22 -0700
Subject: Restore frozenset hash caching removed in cf707dd190a9

---
 Objects/setobject.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'Objects/setobject.c')

diff --git a/Objects/setobject.c b/Objects/setobject.c
index 24424ad8b9..0a065cc27d 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -763,6 +763,9 @@ frozenset_hash(PyObject *self)
     Py_uhash_t hash = 1927868237UL;
     setentry *entry;
 
+    if (so->hash != -1)
+        return so->hash;
+
     /* Initial dispersion based on the number of active entries */
     hash *= (Py_uhash_t)PySet_GET_SIZE(self) + 1;
 
-- 
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