Use annoted source code in Template:Error to avoid special cases in the show exceptions middleware.

actionpack/lib/action_dispatch/middleware/show_exceptions.rb

@@ -133,14 +133,10 @@ module ActionDispatch
         return unless logger
 
         ActiveSupport::Deprecation.silence do
-          if ActionView::Template::Error === exception
-            logger.fatal(exception.to_s)
-          else
-            logger.fatal(
-              "\n#{exception.class} (#{exception.message}):\n  " +
-              clean_backtrace(exception).join("\n  ") + "\n\n"
-            )
-          end
+          message = "\n#{exception.class} (#{exception.message}):\n"
+          message << exception.annoted_source_code if exception.respond_to?(:annoted_source_code)
+          message << exception.backtrace.join("\n  ")
+          logger.fatal("#{message}\n\n")
         end
       end
 

actionpack/lib/action_view/template/error.rb

@@ -84,9 +84,8 @@ module ActionView
           end
       end
 
-      def to_s
-        "\n#{self.class} (#{message}) #{source_location}:\n\n" +
-        "#{source_extract(4)}\n    #{backtrace.join("\n    ")}\n\n"
+      def annoted_source_code
+        source_extract(4)
       end
 
       private

actionpack/test/template/render_test.rb

@@ -111,6 +111,7 @@ module RenderTestCases
     assert_match %r!method.*doesnt_exist!, e.message
     assert_equal "", e.sub_template_message
     assert_equal "1", e.line_number
+    assert_equal "1: <%= doesnt_exist %>", e.annoted_source_code.strip
     assert_equal File.expand_path("#{FIXTURE_LOAD_PATH}/test/_raise.html.erb"), e.file_name
   end