I am trying to run `./bin/search index --all --background` but am getting the following error occurring (many times).
```
[2014-04-02 11:59:02] PHLOG: Unable to build document PHID-CMIT-dud44wwoo2pnv3fpdnzv by indexer PhabricatorRepositoryCommitSearchIndexer. at [/data/www/phabricator/src/applications/search/index/PhabricatorSearchDocumentIndexer.php:53]
[2014-04-02 11:59:02] EXCEPTION: (Exception) Unable to load object by phid 'PHID-CMIT-dud44wwoo2pnv3fpdnzv'! at [/data/www/phabricator/src/applications/search/index/PhabricatorSearchDocumentIndexer.php:31]
#0 PhabricatorSearchDocumentIndexer::loadDocumentByPHID(PHID-CMIT-dud44wwoo2pnv3fpdnzv) called at [/data/www/phabricator/src/applications/repository/search/PhabricatorRepositoryCommitSearchIndexer.php:11]
#1 PhabricatorRepositoryCommitSearchIndexer::buildAbstractDocumentByPHID(PHID-CMIT-dud44wwoo2pnv3fpdnzv) called at [/data/www/phabricator/src/applications/search/index/PhabricatorSearchDocumentIndexer.php:38]
#2 PhabricatorSearchDocumentIndexer::indexDocumentByPHID(PHID-CMIT-dud44wwoo2pnv3fpdnzv) called at [/data/www/phabricator/src/applications/search/index/PhabricatorSearchIndexer.php:22]
#3 PhabricatorSearchIndexer::indexDocumentByPHID(PHID-CMIT-dud44wwoo2pnv3fpdnzv) called at [/data/www/phabricator/src/applications/search/management/PhabricatorSearchManagementIndexWorkflow.php:86]
#4 PhabricatorSearchManagementIndexWorkflow::execute(Object PhutilArgumentParser) called at [/data/www/libphutil/src/parser/argument/PhutilArgumentParser.php:396]
#5 PhutilArgumentParser::parseWorkflowsFull(Array of size 2 starting with: { 0 => Object PhabricatorSearchManagementIndexWorkflow }) called at [/data/www/libphutil/src/parser/argument/PhutilArgumentParser.php:292]
#6 PhutilArgumentParser::parseWorkflows(Array of size 2 starting with: { 0 => Object PhabricatorSearchManagementIndexWorkflow }) called at [/data/www/phabricator/scripts/search/manage_search.php:22]
```
I think this is similar to T4710. It seems that references to old commits still exist in the database.