Multi-lingual: adding a language is broken in 4.2-trunk

In CiviCRM 4.2, when we enable multi-lingual mode, adding a language causes fatal errors.

To reproduce:

• enable backtrace/debug
• enable multi-lingual
• add another language (ex: French)

It will then display a fatal error:

"Database Error Code: 'foo.civicrm_location_type_en_US' is not BASE TABLE, 1347"

Backtrace:

/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/Error.php, backtrace, 161
, handle,
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/PEAR.php, call_user_func, 931
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/DB.php, PEAR_Error, 968
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/PEAR.php, DB_Error, 564
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/DB/common.php, raiseError, 1903
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/DB/mysql.php, raiseError, 898
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/DB/mysql.php, mysqlRaiseError, 327
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/DB/common.php, simpleQuery, 1216
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/DB/DataObject.php, query, 2428
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/DB/DataObject.php, _query, 1614
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/DAO.php, query, 162
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/DAO.php, query, 900
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/DAO.php, executeQuery, 1545
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/DAO.php, createTriggers, 1439
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/I18n/Schema.php, triggerRebuild, 252
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Admin/Form/Setting/Localization.php, addLocale, 275
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/Form.php, postProcess, 246
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/StateMachine.php, mainProcess, 162
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/QuickForm/Action/Next.php, perform, 63
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/HTML/QuickForm/Controller.php, perform, 203
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/packages/HTML/QuickForm/Page.php, handle, 103
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/Controller.php, handle, 279
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Utils/Wrapper.php, run, 115
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/CRM/Core/Invoke.php, run, 193
/var/aegir/platforms/civicrm-4.2-trunk/sites/all/modules/civicrm/drupal/civicrm.module, invoke, 477
, civicrm_invoke,
/var/aegir/platforms/civicrm-4.2-trunk/includes/menu.inc, call_user_func_array, 517
/var/aegir/platforms/civicrm-4.2-trunk/index.php, menu_execute_active_handler, 21

There are also warnings that may be related:

Warning: substr() expects parameter 1 to be string, array given in CRM_Core_DAO::createTriggers() (line 1480 of civicrm/CRM/Core/DAO.php).
Warning: trim() expects parameter 1 to be string, array given in CRM_Core_DAO::createTriggers() (line 1500 of civicrm/CRM/Core/DAO.php).
Notice: Undefined index: variables in CRM_Core_DAO::createTriggers() (line 1504 of civicrm/CRM/Core/DAO.php).