From 56506a6ed2380cddc0e70d2df254ce4724b43629 Mon Sep 17 00:00:00 2001
From: Mark Dickinson <dickinsm@gmail.com>
Date: Mon, 5 Apr 2010 18:54:51 +0000
Subject: Use a better NaN test in _Py_HashDouble as well.

---
 Objects/object.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Objects/object.c b/Objects/object.c
index 8417a99..cf8a550 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -1025,9 +1025,12 @@ _Py_HashDouble(double v)
 	 * of mapping keys will turn out weird.
 	 */
 
-	if (Py_IS_INFINITY(v))
-		/* can't convert to long int -- arbitrary */
-		v = v < 0 ? -271828.0 : 314159.0;
+	if (!Py_IS_FINITE(v)) {
+		if (Py_IS_INFINITY(v))
+			return v < 0 ? -271828 : 314159;
+		else
+			return 0;
+	}
 	fractpart = modf(v, &intpart);
 	if (fractpart == 0.0) {
 		/* This must return the same hash as an equal int or long. */
-- 
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