Tests pass in Rubinius 1.1.0

lib/paperclip/interpolations.rb

@@ -41,8 +41,9 @@ module Paperclip
     # Returns the interpolated URL. Will raise an error if the url itself
     # contains ":url" to prevent infinite recursion. This interpolation
     # is used in the default :path to ease default specifications.
+    RIGHT_HERE = "#{__FILE__.gsub(%r{^\./}, "")}:#{__LINE__ + 3}"
     def url attachment, style_name
-      raise InfiniteInterpolationError if caller.any?{|b| b.index("#{__FILE__}:#{__LINE__ + 1}") }
+      raise InfiniteInterpolationError if caller.any?{|b| b.index(RIGHT_HERE) }
       attachment.url(style_name, false)
     end
 

test/attachment_test.rb

@@ -606,7 +606,7 @@ class AttachmentTest < Test::Unit::TestCase
               [:large, :medium, :small].each do |style|
                 io = @attachment.to_file(style)
                 # p "in commit to disk test, io is #{io.inspect} and @instance.id is #{@instance.id}"
-                assert File.exists?(io)
+                assert File.exists?(io.path)
                 assert ! io.is_a?(::Tempfile)
                 io.close
               end