我需要从可选择的帖子类别列表中隐藏“未分类”，并编写一些代码来实现这一点。This function worked fine 在WP 4.7.5之前，成功隐藏了以下类别：

add_filter(\'list_terms_exclusions\', \'myproject_hide_uncategorized\',1);
function myproject_hide_uncategorized( $exclude_query ) {
  if (function_exists(\'get_current_screen\')) {
    $currentScreen = get_current_screen();

    if ($currentScreen->base == \'post\') {
      $newquery = "";
      $excluidos = array();
      $excluidos[] = get_category_by_slug(\'sem-categoria\')->cat_ID;
      $excluidos[] = get_category_by_slug(\'uncategorized\')->cat_ID;
      foreach ($excluidos as $excluido) {
        $newquery .= " AND t.term_id <> \'$excluido\' ";
      }
      $exclude_query .= $newquery;
    }
  }
  return $exclude_query;
}

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 130968 bytes) in /var/www/html/wp-includes/class-wp-term-query.php on line 294

看起来崩溃是由这四条线引起的，将其添加到functions.php 任何主题的文件似乎都会导致崩溃：

add_filter(\'list_terms_exclusions\', \'this_will_crash_wordpress\');
function this_will_crash_wordpress( $exclude_query ) {
  get_category_by_slug(\'uncategorized\');
}

What changed between 4.7.5 that causes this error? How can I make it go away? Do I have to rewrite my code? If so, how?