Require that `ActionView::Base` subclasses implement `#compiled_method_container`

actionview/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Require that `ActionView::Base` subclasses implement `#compiled_method_container`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated support to pass an object that is not a `ActionView::LookupContext` as the first argument
     in `ActionView::Base#initialize`.
  

actionview/lib/action_view/base.rb

@@ -250,15 +250,11 @@ module ActionView #:nodoc:
     end
 
     def compiled_method_container
-      if self.class == ActionView::Base
-        ActiveSupport::Deprecation.warn <<~eowarn.squish
-          ActionView::Base instances must implement `compiled_method_container`
-          or use the class method `with_empty_template_cache` for constructing
-          an ActionView::Base instance that has an empty cache.
-        eowarn
-      end
-
-      self.class
+      raise NotImplementedError, <<~msg.squish
+        Subclasses of ActionView::Base must implement `compiled_method_container`
+        or use the class method `with_empty_template_cache` for constructing
+        an ActionView::Base subclass that has an empty cache.
+      msg
     end
 
     def in_rendering_context(options)

actionview/test/template/render_test.rb

@@ -380,7 +380,7 @@ module RenderTestCases
 
   def test_without_compiled_method_container_is_deprecated
     view = ActionView::Base.with_view_paths(ActionController::Base.view_paths)
-    assert_deprecated("ActionView::Base instances must implement `compiled_method_container`") do
+    assert_raises(NotImplementedError) do
       assert_equal "Hello world!", view.render(template: "test/hello_world")
     end
   end

guides/source/6_1_release_notes.md

@@ -55,6 +55,8 @@ Please refer to the [Changelog][action-pack] for detailed changes.
 
 ### Removals
 
+*   Require that `ActionView::Base` subclasses implement `#compiled_method_container`.
+
 *   Remove deprecated support to pass an object that is not a `ActionView::LookupContext` as the first argument
     in `ActionView::Base#initialize`.