From 2d82342cf299220e0e7f84d464b205231fd41e8f Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 28 Mar 2014 02:27:14 +0000
Subject: string.c: unset $~ if unmatch

* string.c (rb_pat_search): unset $~ if the last match failed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45458 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_string.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'test/ruby/test_string.rb')

diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 5c8c4184a0..62402353a7 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -1147,6 +1147,14 @@ class TestString < Test::Unit::TestCase
     res = []
     a.scan(/./) { |w| res << w }
     assert_predicate(res[0], :tainted?, '[ruby-core:33338] #4087')
+
+    /h/ =~ a
+    a.scan(/x/)
+    assert_nil($~)
+
+    /h/ =~ a
+    a.scan('x')
+    assert_nil($~)
   end
 
   def test_size
-- 
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