ruby-prof isn't compatible with ruby trunk after 36925

Gemfile

@@ -41,8 +41,8 @@ instance_eval File.read local_gemfile if File.exists? local_gemfile
 
 platforms :mri do
   group :test do
-    gem 'ruby-prof', '~> 0.11.2'
-    gem 'debugger' if !ENV['TRAVIS'] && RUBY_VERSION < "2.0" && RUBY_PATCHLEVEL < 286
+    gem 'ruby-prof', '~> 0.11.2' if RUBY_VERSION < '2.0'
+    gem 'debugger' if !ENV['TRAVIS'] && RUBY_VERSION < '2.0' && RUBY_PATCHLEVEL < 286
   end
 end