Segmentation fault (core dumped) 8.1.11

[lucasconstantino]

I'm experiencing a Segmentation fault (core dumped) error when executing drush cr, using drush version 8.1.11 with Drupal 8 on php 5.6.27-0+deb8u1.

I've tracked down the issue to a - recently added - user cache clearing.

/**
 * Rebuild a Drupal 8 site.
 *
 * This is a transpose of core/rebuild.php. Additionally
 * it also clears drush cache and drupal render cache.
 */
function drush_cache_rebuild() {
  if (!drush_get_option('cache-clear', TRUE)) {
    drush_log(dt("Skipping cache-clear operation due to --cache-clear=0 option."), LogLevel::OK);
    return TRUE;
  }
  chdir(DRUPAL_ROOT);

  // Clear the APC cache to ensure APC class loader is reset.
  if (function_exists('apc_fetch')) {
    apc_clear_cache('user');
  }
  // Clear user cache for all major platforms.
  $user_caches = [
    'apcu_clear_cache',
    'wincache_ucache_clear',
    'xcache_clear_cache',
  ];
  array_map('call_user_func', array_filter($user_caches, 'is_callable'));

  $autoloader = drush_drupal_load_autoloader(DRUPAL_ROOT);
  require_once DRUSH_DRUPAL_CORE . '/includes/utility.inc';

  $request = Request::createFromGlobals();
  // Ensure that the HTTP method is set, which does not happen with Request::createFromGlobals().
  $request->setMethod('GET');
  // Manually resemble early bootstrap of DrupalKernel::boot().
  require_once DRUSH_DRUPAL_CORE . '/includes/bootstrap.inc';
  DrupalKernel::bootEnvironment();
  // Avoid 'Only variables should be passed by reference'
  $root  = DRUPAL_ROOT;
  $site_path = DrupalKernel::findSitePath($request);
  Settings::initialize($root, $site_path, $autoloader);

  // Use our error handler since _drupal_log_error() depends on an unavailable theme system (ugh).
  set_error_handler('drush_error_handler');

  // drupal_rebuild() calls drupal_flush_all_caches() itself, so we don't do it manually.
  drupal_rebuild($autoloader, $request);
  drush_log(dt('Cache rebuild complete.'), LogLevel::OK);

  // As this command replaces `drush cache-clear all` for Drupal 8 users, clear
  // the Drush cache as well, for consistency with that behavior.
  drush_cache_clear_drush();
}

The problem happen on this line:

array_map('call_user_func', array_filter($user_caches, 'is_callable'));

Aparently this can be solved by removing the use of array_map as such:

  foreach (array_filter($user_caches, 'is_callable') as $cache) {
    call_user_func($cache);
  }

[weitzman]

Please open a PR. Note that we already test on PHP 5.6 so it would be good to understand when this happens.

[FlorentTorregrosa]

Hello,

I have the same problem and I fixed it by commenting the line "apcu_clear_cache'," if it can help.

[FlorentTorregrosa]

Pull request created.

[Spurlos]

Drush v8.1.10 also affected, patch from PR solved the issue.

[weitzman]

Lets discuss in the PR