Undefined index: fieldable in field_ui_menu() and Undefined index: bundles in field_info_bundles()

after clearing the cache I get the following notices:

Notice: Undefined index: fieldable in field_ui_menu() (Line 82 in /modules/field_ui/field_ui.module).

Notice: Undefined index: bundles in field_info_bundles() (Line 576 in /modules/field/field.info.inc).

(there are actually some more errors caused by this)

I can fix the first issue by change that line from:
if ($entity_info['fieldable']) {
to:
if (isset($entity_info['fieldable'])) {

furthermore I changed the second one from:

  foreach ($info as $type => $entity_info) {
    $bundles[$type] = $entity_info['bundles'];
  }

to

  foreach ($info as $type => $entity_info) {
    if(isset($entity_info['bundles'])) {
      $bundles[$type] = $entity_info['bundles'];
    }
  }

I have no idea what this is all about but these are my hotfixes.