Move the exceptions for missing template into Compatibility in prep for moving it into a "not-production" module

actionpack/lib/action_controller/abstract/layouts.rb

@@ -140,8 +140,6 @@ module AbstractController
       rescue NameError => e
         raise NoMethodError,
           "You specified #{@_layout.inspect} as the layout, but no such method was found"
-      rescue ActionView::MissingTemplate
-        _find_by_parts(_layout({}), {})
       end
     end
 

actionpack/lib/action_controller/base/compatibility.rb

@@ -118,6 +118,13 @@ module ActionController
       details[:prefix] = nil if name =~ /\blayouts/
       super
     end
+    
+    # Move this into a "don't run in production" module
+    def _default_layout(details, require_layout = false)
+      super
+    rescue ActionView::MissingTemplate
+      _find_by_parts(_layout({}), {})
+    end
 
     def performed?
       response_body