fix for rbx

Rubinius returns a boolean after such assingment
response = (_, headers, body = @app.call(env))

see https://github.com/rubinius/rubinius/issues/2117

get rid of a local variable

1 files changed, 2 insertions, 2 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
index 6bc5876b6c..3f1cf14825 100644
--- a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
@@ -15,7 +15,7 @@ module ActionDispatch
 
     def call(env)
       begin
-        response = (_, headers, body = @app.call(env))
+        status, headers, body = @app.call(env)
 
         if headers['X-Cascade'] == 'pass'
           body.close if body.respond_to?(:close)
@@ -25,7 +25,7 @@ module ActionDispatch
         raise exception if env['action_dispatch.show_exceptions'] == false
       end
 
-      exception ? render_exception(env, exception) : response
+      exception ? render_exception(env, exception) : [status, headers, body]
     end
 
     private