Update to drupal-org-drupal 8.0.0-rc2. For more information, see https://www.drupal.org/node/2598668

core/modules/field/migration_templates/d6_field_formatter_settings.yml

@@ -28,7 +28,14 @@ process:
       index:
         - 1
   entity_type: 'constants/entity_type'
-  bundle: type_name
+  bundle:
+    -
+      plugin: migration
+      migration: d6_node_type
+      source: type_name
+    -
+      plugin: skip_on_empty
+      method: row
   view_mode:
     -
       plugin: migration

core/modules/field/migration_templates/d6_field_instance.yml

@@ -28,7 +28,14 @@ process:
       method: row
   entity_type: 'constants/entity_type'
   field_name: field_name
-  bundle: type_name
+  bundle:
+    -
+      plugin: migration
+      migration: d6_node_type
+      source: type_name
+    -
+      plugin: skip_on_empty
+      method: row
   label: label
   description: description
   required: required

core/modules/field/migration_templates/d6_field_instance_widget_settings.yml

@@ -28,7 +28,14 @@ process:
     -
       plugin: skip_on_empty
       method: row
-  bundle: type_name
+  bundle:
+    -
+      plugin: migration
+      migration: d6_node_type
+      source: type_name
+    -
+      plugin: skip_on_empty
+      method: row
   form_mode: 'constants/form_mode'
   field_name: field_name
   entity_type: 'constants/entity_type'