From 78be0172f74e2bf109f7a216e43257ba3eb8ecc4 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Thu, 10 Aug 2017 08:36:09 +0900
Subject: Normalize float numbers before calculating a hash value.

---
 src/etc.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/etc.c')

diff --git a/src/etc.c b/src/etc.c
index e0810d589..9475ae304 100644
--- a/src/etc.c
+++ b/src/etc.c
@@ -93,6 +93,8 @@ mrb_float_id(mrb_float f)
   int len = sizeof(f);
   mrb_int id = 0;
 
+  /* normalize -0.0 to 0.0 */
+  if (f == 0) f = 0.0;
   while (len--) {
     id = id*65599 + *p;
     p++;
-- 
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