From aab2f788d784ef73dd088f7cc6e258672da0ae59 Mon Sep 17 00:00:00 2001
From: marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 24 Jan 2013 07:50:33 +0000
Subject: * enumerator.c (lazy_zip): raise error for bad arguments   [Bug
 #7706]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38926 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 enumerator.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'enumerator.c')

diff --git a/enumerator.c b/enumerator.c
index 62dbf57..71f473a 100644
--- a/enumerator.c
+++ b/enumerator.c
@@ -1663,6 +1663,12 @@ lazy_zip(int argc, VALUE *argv, VALUE obj)
     for (i = 0; i < argc; i++) {
 	v = rb_check_array_type(argv[i]);
 	if (NIL_P(v)) {
+	    for (; i < argc; i++) {
+		if (!rb_respond_to(argv[i], id_each)) {
+		    rb_raise(rb_eTypeError, "wrong argument type %s (must respond to :each)",
+			rb_obj_classname(argv[i]));
+		}
+	    }
 	    ary = rb_ary_new4(argc, argv);
 	    func = lazy_zip_func;
 	    break;
-- 
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