Deletes AS::Dependencies::Blamable

This is an internal class which is no longer needed.

actionpack/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb

@@ -1,10 +1,3 @@
-<% unless @exception.blamed_files.blank? %>
-  <% if (hide = @exception.blamed_files.length > 8) %>
-    <a href="#" onclick="return toggleTrace()">Toggle blamed files</a>
-  <% end %>
-  <pre id="blame_trace" <%='style="display:none"' if hide %>><code><%= @exception.describe_blame %></code></pre>
-<% end %>
-
 <h2 style="margin-top: 30px">Request</h2>
 <% if params_valid? %>
   <p><b>Parameters</b>:</p> <pre><%= debug_params(@request.filtered_parameters) %></pre>

actionpack/lib/action_dispatch/middleware/templates/rescues/layout.erb

@@ -239,9 +239,6 @@
     var hide = function(id) {
       document.getElementById(id).style.display = 'none';
     }
-    var toggleTrace = function() {
-      return toggle('blame_trace');
-    }
     var toggleSessionDump = function() {
       return toggle('session_dump');
     }

activesupport/lib/active_support/dependencies.rb

@@ -298,9 +298,6 @@ module ActiveSupport #:nodoc:
         else
           yield
         end
-      rescue Exception => exception  # errors from loading file
-        exception.blame_file! file if exception.respond_to? :blame_file!
-        raise
       end
 
       # Mark the given constant as unloadable. Unloadable constants are removed
@@ -334,31 +331,9 @@ module ActiveSupport #:nodoc:
         end
     end
 
-    # Exception file-blaming.
-    module Blamable #:nodoc:
-      def blame_file!(file)
-        (@blamed_files ||= []).unshift file
-      end
-
-      def blamed_files
-        @blamed_files ||= []
-      end
-
-      def describe_blame
-        return nil if blamed_files.empty?
-        "This error occurred while loading the following files:\n   #{blamed_files.join "\n   "}"
-      end
-
-      def copy_blame!(exc)
-        @blamed_files = exc.blamed_files.clone
-        self
-      end
-    end
-
     def hook!
       Loadable.include_into(Object)
       ModuleConstMissing.include_into(Module)
-      Exception.include(Blamable)
     end
 
     def unhook!
@@ -381,7 +356,6 @@ module ActiveSupport #:nodoc:
           load_error.message
         end
         load_error_message.replace(message % file_name)
-        load_error.copy_blame!(load_error)
       end
       raise
     end

activesupport/test/dependencies/raises_exception_without_blame_file.rb

@@ -1,7 +0,0 @@
-# frozen_string_literal: true
-
-exception = Exception.new("I am not blamable!")
-class << exception
-  undef_method(:blame_file!)
-end
-raise exception

activesupport/test/dependencies_test.rb

@@ -104,13 +104,6 @@ class DependenciesTest < ActiveSupport::TestCase
     end
   end
 
-  def test_dependency_which_raises_doesnt_blindly_call_blame_file!
-    with_loading do
-      filename = "dependencies/raises_exception_without_blame_file"
-      assert_raises(Exception) { require_dependency filename }
-    end
-  end
-
   def test_warnings_should_be_enabled_on_first_load
     with_loading "dependencies" do
       old_warnings, ActiveSupport::Dependencies.warnings_on_first_load = ActiveSupport::Dependencies.warnings_on_first_load, true