Fixes T4477. Sort of winging this but it's probably the right fix?
One error in T4477.
One error via email:
[2014-04-15 17:44:34] ERROR 8: Undefined index: /some_index/ at [/phab_path/phabricator/src/applications/owners/storage/PhabricatorOwnersPackage.php:213] #0 PhabricatorOwnersPackage::findLongestPathsPerPackage(Array of size 3 starting with: { 0 => Array of size 3 starting with: { id => 5 } }, Array of size 8 starting with: { / => Array of size 2 starting with: { /some_index/some_file.py => true } }) called at [/phab_path/phabricator/src/applications/owners/storage/PhabricatorOwnersPackage.php:170] #1 PhabricatorOwnersPackage::loadPackagesForPaths(Object PhabricatorRepository, Array of size 2 starting with: { 0 => /some_index/some_file.py }) called at [/phab_path/phabricator/src/applications/owners/storage/PhabricatorOwnersPackage.php:119] ...