gsub! should raise runtime error on frozen strings when block is given and match is found

0001-gsub-should-raise-runtime-error-on-frozen-strings-wh.patch

From 02edb2d2de470bec7bcdd030bb05ed7c7c967907 Mon Sep 17 00:00:00 2001
From: Diego Scataglini <[email protected]>
Date: Wed, 24 Nov 2010 12:11:20 -0500
Subject: [PATCH] gsub! should raise runtime error on frozen strings when block is given and match is found

---
 kernel/common/string.rb |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/kernel/common/string.rb b/kernel/common/string.rb
index cce3a97..ce004f8 100644
--- a/kernel/common/string.rb
+++ b/kernel/common/string.rb
@@ -965,7 +965,9 @@ class String
 
     last_match = nil
     match = pattern.match_from self, last_end
-
+    
+    raise RuntimeError, "string frozen" if block_given? && match && frozen?
+    
     offset = match.begin 0 if match
 
     while match
-- 
1.7.1.1