* hash.c (rb_hash_reject_bang): do not call rb_hash_foreach() if RHash

  has ntbl and it is empty.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41929 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 7 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 2f692f2651..b3b5a92dd2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Jul 12 11:26:25 2013  Masaki Matsushita  <glass.saga@gmail.com>
+
+	* hash.c (rb_hash_reject_bang): do not call rb_hash_foreach() if RHash
+	  has ntbl and it is empty.
+
 Fri Jul 12 11:17:41 2013  Masaki Matsushita  <glass.saga@gmail.com>
 
 	* hash.c (recursive_hash): use RHASH_SIZE() to check hash size.
diff --git a/hash.c b/hash.c
index 95fea9e96d..182a856a38 100644
--- a/hash.c
+++ b/hash.c
@@ -1061,9 +1061,8 @@ rb_hash_reject_bang(VALUE hash)
 
     RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
     rb_hash_modify(hash);
-    if (!RHASH(hash)->ntbl)
-        return Qnil;
-    n = RHASH(hash)->ntbl->num_entries;
+    n = RHASH_SIZE(hash);
+    if (!n) return Qnil;
     rb_hash_foreach(hash, delete_if_i, hash);
     if (n == RHASH(hash)->ntbl->num_entries) return Qnil;
     return hash;