Features with too much info are not retrieved in

When I empty my Class Registry (using admin menu) I get a:

Warning: Invalid argument supplied for foreach() in _registry_update() (line 54 of /var/www/html/switch/includes/registry.inc).

This is because the info column in the system table for this feature exceeds the maximum length, and the full array is stored in the BLOB table.
The problem seems to be retrieving the BLOB value. I tried changing the beginning of _registry_update to the following, so the Oracle Driver would handle the FetchAll, but that still does not seem to work:

function _registry_update() {

  // The registry serves as a central autoloader for all classes, including
  // the database query builders. However, the registry rebuild process
  // requires write ability to the database, which means having access to the
  // query builders that require the registry in order to be loaded. That
  // causes a fatal race condition. Therefore we manually include the
  // appropriate query builders for the currently active database before the
  // registry rebuild process runs.
  $connection_info = Database::getConnectionInfo();
  $driver = $connection_info['default']['driver'];
  require_once DRUPAL_ROOT . '/includes/database/' . $driver . '/database.inc';
  require_once DRUPAL_ROOT . '/includes/database/' . $driver . '/schema.inc';
  require_once DRUPAL_ROOT . '/includes/database/' . $driver . '/select.inc';
  require_once DRUPAL_ROOT . '/includes/database/' . $driver . '/query.inc';

The workaround (for people who googled this) is to include fewer exportables in your feature, until the array fits in the info column.