trunk upgrade errors

PHP Fatal error:  Class 'TikiLib' not found in /var/www/tiki/trunk/lib/setup/prefs.php on line 31
PHP Stack trace:
PHP   1. {main}() /var/www/tiki/trunk/installer/shell.php:0
PHP   2. Installer->update() /var/www/tiki/trunk/installer/shell.php:40
PHP   3. Installer->installPatch($patch = '20101230_create_top_modules_tiki') /var/www/tiki/trunk/installer/installlib.php:78
PHP   4. upgrade_20101230_create_top_modules_tiki($installer = class Installer { public $patches = array (0 => '20101230_create_top_modules_tiki', 1 => '20110103_include_in_history_tiki', 2 => '20110104_flagged_revision_log_tiki', 3 => '20110112_approval_permissions_tiki', 4 => '20110115_create_bottom_modules_tiki', 5 => '20110118_p_remove_tracker_items_tiki', 6 => '20110124_update_sheet_to_support_cloning_tiki', 7 => '20110201_c_code_to_user_modules_tiki', 8 => '20110209_p_list_users_tiki', 9 => '20110220_p_tracker_view_attachments_tiki', 10 => '20110223_queue_tiki', 11 => '20110224_tiki_cart_inventory_hold', 12 => '20110307_remove_calendar_reminder_tiki', 13 => '20110308_rss_item_key_tiki', 14 => '20110317_attributes_increase_length_tiki'); public $scripts = array (); public $installed = array (); public $executed = array (); public $success = array (0 => 'SELECT patch_name FROM tiki_schema', 1 => 'show tables'); public $failures = array (); private ${TikiDb}:errorHandler = NULL; private ${TikiDb}:errorMessage = NULL; private ${TikiDb}:serverType = NULL; protected $savedQuery = NULL; private ${TikiDb}:tablePrefix = NULL; private ${TikiDb}:usersTablePrefix = NULL }) /var/www/tiki/trunk/installer/installlib.php:102
PHP   5. include_once() /var/www/tiki/trunk/installer/schema/20101230_create_top_modules_tiki.php:27
PHP   6. initialize_prefs() /var/www/tiki/trunk/lib/setup/prefs.php:19
PHP   7. get_default_prefs() /var/www/tiki/trunk/lib/setup/prefs.php:368


Fatal error: Call to a member function list_languages() on a non-object in /var/www/tiki/trunk/lib/prefs/available.php on line 10

Call Stack:
    0.0004     361904   1. {main}() /var/www/tiki/trunk/tiki-install.php:0
    0.0258    2971436   2. include_once('/var/www/tiki/trunk/installer/tiki-installer.php') /var/www/tiki/trunk/tiki-install.php:68
    0.0940    6635696   3. Installer->update() /var/www/tiki/trunk/installer/tiki-installer.php:773
    0.1014    6638428   4. Installer->installPatch('20101230_create_top_modules_tiki') /var/www/tiki/trunk/installer/installlib.php:78
    0.1017    6653260   5. upgrade_20101230_create_top_modules_tiki(class Installer { public $patches = array (0 => '20101230_create_top_modules_tiki', 1 => '20110103_include_in_history_tiki', 2 => '20110104_flagged_revision_log_tiki', 3 => '20110112_approval_permissions_tiki', 4 => '20110115_create_bottom_modules_tiki', 5 => '20110118_p_remove_tracker_items_tiki', 6 => '20110124_update_sheet_to_support_cloning_tiki', 7 => '20110201_c_code_to_user_modules_tiki', 8 => '20110209_p_list_users_tiki', 9 => '20110220_p_tracker_view_attachments_tiki', 10 => '20110223_queue_tiki', 11 => '20110224_tiki_cart_inventory_hold', 12 => '20110307_remove_calendar_reminder_tiki', 13 => '20110308_rss_item_key_tiki', 14 => '20110317_attributes_increase_length_tiki'); public $scripts = array (); public $installed = array (); public $executed = array (); public $success = array (0 => 'SELECT patch_name FROM tiki_schema', 1 => 'show tables', 2 => 'show tables', 3 => 'show tables'); public $failures = array (); private ${TikiDb}:errorHandler = NULL; private ${TikiDb}:errorMessage = NULL; private ${TikiDb}:serverType = NULL; protected $savedQuery = NULL; private ${TikiDb}:tablePrefix = NULL; private ${TikiDb}:usersTablePrefix = NULL }) /var/www/tiki/trunk/installer/installlib.php:102
    0.1024    6731588   6. include_once('/var/www/tiki/trunk/lib/setup/prefs.php') /var/www/tiki/trunk/installer/schema/20101230_create_top_modules_tiki.php:27
    0.1024    6733048   7. initialize_prefs() /var/www/tiki/trunk/lib/setup/prefs.php:19
    0.1024    6733092   8. get_default_prefs() /var/www/tiki/trunk/lib/setup/prefs.php:368
    0.1039    6888868   9. PreferencesLib->getDefaults() /var/www/tiki/trunk/lib/setup/prefs.php:32
    0.1123    7114276  10. PreferencesLib->getFileData('available', TRUE) /var/www/tiki/trunk/lib/prefslib.php:497
    0.1126    7124124  11. prefs_available_list(TRUE) /var/www/tiki/trunk/lib/prefslib.php:214