3 files changed, 7 insertions, 9 deletions
diff --git a/railties/lib/rails/application/bootstrap.rb b/railties/lib/rails/application/bootstrap.rb
index 022e1a91d8..e62eed8a87 100644
--- a/railties/lib/rails/application/bootstrap.rb
+++ b/railties/lib/rails/application/bootstrap.rb
@@ -10,7 +10,8 @@ module Rails
         require environment if environment
       end
 
-      initializer :load_all_active_support do
+      initializer :load_active_support do
+        require 'active_support/dependencies'
         require "active_support/all" unless config.active_support.bare
       end
 
@@ -18,7 +19,6 @@ module Rails
       # Used by Passenger to ensure everything's loaded before forking and
       # to avoid autoload race conditions in JRuby.
       initializer :preload_frameworks do
-        require 'active_support/dependencies'
         ActiveSupport::Autoload.eager_autoload! if config.preload_frameworks
       end
 
@@ -66,8 +66,8 @@ module Rails
         ActiveSupport::Dependencies.mechanism = config.cache_classes ? :require : :load
       end
 
-      initializer :bootstrap_load_path do
-        # This is just an initializer used as hook so all load paths are loaded together
+      initializer :bootstrap_hook do |app|
+        ActiveSupport.run_load_hooks(:before_initialize, app)
       end
     end
   end
diff --git a/railties/lib/rails/application/configuration.rb b/railties/lib/rails/application/configuration.rb
index 1ad77fdfec..cd77f1adaf 100644
--- a/railties/lib/rails/application/configuration.rb
+++ b/railties/lib/rails/application/configuration.rb
@@ -33,7 +33,7 @@ module Rails
       end
 
       def middleware
-        @middleware ||= default_middleware_stack
+        @middleware ||= app_middleware.merge_into(default_middleware_stack)
       end
 
       def metal_loader
diff --git a/railties/lib/rails/application/finisher.rb b/railties/lib/rails/application/finisher.rb
index 94507bb387..03bc270c81 100644
--- a/railties/lib/rails/application/finisher.rb
+++ b/railties/lib/rails/application/finisher.rb
@@ -35,10 +35,8 @@ module Rails
         app
       end
 
-      initializer :after_initialize do
-        config.after_initialize_blocks.each do |block|
-          block.call(self)
-        end
+      initializer :finisher_hook do |app|
+        ActiveSupport.run_load_hooks(:after_initialize, app)
       end
 
       # Disable dependency loading during request cycle