1 files changed, 12 insertions, 1 deletions
diff --git a/spec/ruby/core/string/fixtures/classes.rb b/spec/ruby/core/string/fixtures/classes.rb
index 6af106f9d3..26fcd51b5d 100644
--- a/spec/ruby/core/string/fixtures/classes.rb
+++ b/spec/ruby/core/string/fixtures/classes.rb
@@ -4,7 +4,7 @@ class Object
   def unpack_format(count=nil, repeat=nil)
     format = "#{instance_variable_get(:@method)}#{count}"
     format *= repeat if repeat
-    format
+    format.dup # because it may then become tainted
   end
 end
 
@@ -46,4 +46,15 @@ module StringSpecs
       self.replace(str)
     end
   end
+
+  class SpecialVarProcessor
+    def process(match)
+      if $~ != nil
+        str = $~[0]
+      else
+        str = "unset"
+      end
+      "<#{str}>"
+    end
+  end
 end