athena% ~/opt/php54/bin/php extensions.php list
Fatal error: Uncaught exception 'UnexpectedValueException' with message 'RecursiveDirectoryIterator::__construct(/var/www/qi/boards/x3/develop/../ext/): failed to open dir: No such file or directory' in /var/www/qi/boards/x3/includes/extension/manager.php:357
#0 /var/www/qi/boards/x3/includes/extension/manager.php(357): RecursiveDirectoryIterator->__construct('/var/www/qi/boa...')
#1 /var/www/qi/boards/x3/develop/extensions.php(52): phpbb_extension_manager->all_available()
#2 /var/www/qi/boards/x3/develop/extensions.php(103): list_extensions()
thrown in /var/www/qi/boards/x3/includes/extension/manager.php on line 357
It should simply say that there are no available extensions.
And possibly this needs to be fixed in extension manager.
Note that we do not have ext directory in the repository.