Fix rescue from LoadError in engine loading

lib/inherited_resources/class_methods.rb

@@ -368,7 +368,7 @@ def initialize_resources_class_accessors! #:nodoc:
         namespaces.delete_if do |namespace|
           begin
             "#{namespace}/engine".camelize.constantize.isolated?
-          rescue
+          rescue StandardError, LoadError
             false
           end
         end

test/autoload/engine.rb

@@ -0,0 +1,3 @@
+module MyTestNamespace
+  class Engine; end
+end

test/class_methods_test.rb

@@ -62,6 +62,8 @@ module MyNamespace
   class PeopleController < InheritedResources::Base; end
 end
 
+module EmptyNamespace; end
+
 class ActionsClassMethodTest < ActionController::TestCase
   tests BooksController
 
@@ -206,3 +208,13 @@ def test_route_prefix_present_when_parent_module_is_not_a_engine
     assert_equal 'my_namespace', MyNamespace::PeopleController.send(:resources_configuration)[:self][:route_prefix]
   end
 end
+
+class EngineLoadErrorTest < ActiveSupport::TestCase
+  def test_does_not_crash_on_engine_load_error
+    ActiveSupport::Dependencies.autoload_paths << 'test/autoload'
+
+    EmptyNamespace.class_eval <<-RUBY
+      class PeopleController < InheritedResources::Base; end
+    RUBY
+  end
+end