Revert "Merge pull request #953 from jackxxu/cache-to-app-in-rack-builder"

This reverts commit 2afc14627c9656004325ae17d028ebe7f7e73c0f, reversing
changes made to 51356a65185d6c74f7e588ec468ad64ca3a49bcb.

2 files changed, 1 insertions, 14 deletions

diff --git a/lib/rack/builder.rb b/lib/rack/builder.rb
index f11c66bc..11f596bd 100644
--- a/lib/rack/builder.rb
+++ b/lib/rack/builder.rb
@@ -157,7 +157,7 @@ module Rack
     end
 
     def call(env)
-      (@_app ||= to_app).call(env)
+      to_app.call(env)
     end
 
     private
diff --git a/test/spec_builder.rb b/test/spec_builder.rb
index 326f6b6c..111d7b55 100644
--- a/test/spec_builder.rb
+++ b/test/spec_builder.rb
@@ -201,19 +201,6 @@ describe Rack::Builder do
     end.must_raise(RuntimeError)
   end
 
-  it "doesn't dupe #to_app when mapping" do
-    app = builder do
-      map '/' do |outer_env|
-        run lambda { |env|  [200, {"Content-Type" => "text/plain"}, [object_id.to_s]] }
-      end
-    end
-
-    builder_app1_id = Rack::MockRequest.new(app).get("/").body.to_s
-    builder_app2_id = Rack::MockRequest.new(app).get("/").body.to_s
-
-    assert_equal builder_app2_id, builder_app1_id
-  end
-
   describe "parse_file" do
     def config_file(name)
       File.join(File.dirname(__FILE__), 'builder', name)