merge revision(s) 49999,50000: [Backport #10979]

	* hash.c (rb_any_hash): use same hash values with Float#hash so
	  that -0.0 and +0.0 will be identical.
	  [ruby-core:68541] [Bug #10979]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@50619 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 2 deletions

diff --git a/numeric.c b/numeric.c
index 0222c76e29..e7435bbbc8 100644
--- a/numeric.c
+++ b/numeric.c
@@ -1137,10 +1137,14 @@ flo_eq(VALUE x, VALUE y)
 static VALUE
 flo_hash(VALUE num)
 {
-    double d;
+    return rb_dbl_hash(RFLOAT_VALUE(num));
+}
+
+VALUE
+rb_dbl_hash(double d)
+{
     st_index_t hash;
 
-    d = RFLOAT_VALUE(num);
     /* normalize -0.0 to 0.0 */
     if (d == 0.0) d = 0.0;
     hash = rb_memhash(&d, sizeof(d));