From 9b4b5ad27c56ab713a95dfbfa84fdd74280fc9ca Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 27 Aug 2013 07:56:17 +0000
Subject: [PATCH] enumerator.c: add comment

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42706 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog    | 3 ++-
 enumerator.c | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 1303d97a6f..6e9e316c7e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 Tue Aug 27 16:51:21 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
-	* enumerator.c (enumerator_each): ensure argument array size is int.
+	* enumerator.c (enumerator_each): ensure that argument array size
+	  does not overflow at appending.
 
 Tue Aug 27 16:46:05 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
diff --git a/enumerator.c b/enumerator.c
index 51c09597a7..a83c0533d7 100644
--- a/enumerator.c
+++ b/enumerator.c
@@ -448,6 +448,7 @@ enumerator_each(int argc, VALUE *argv, VALUE obj)
 	VALUE args = e->args;
 	if (args) {
 #if SIZEOF_INT < SIZEOF_LONG
+	    /* check int range overflow */
 	    rb_long2int(RARRAY_LEN(args) + argc);
 #endif
 	    args = rb_ary_dup(args);