rc --trace diff create
libphutil loaded from '/usr/local/lib/php/libphutil/src'.
arcanist loaded from '/usr/local/lib/php/arcanist/src'.
Config: Reading user configuration file "/usr/home/gnn/.arcrc"...
Config: Did not find system configuration at "/etc/arcconfig".
Working Copy: Reading .arcconfig from "/tank/users/gnn/svn/FreeBSD.HEAD/.arcconfig".
Working Copy: Path "/tank/users/gnn/svn/FreeBSD.HEAD" is part of `svn` working copy "/tank/users/gnn/svn/FreeBSD.HEAD".
Working Copy: Project root is at "/tank/users/gnn/svn/FreeBSD.HEAD".
Config: Did not find local configuration at "/tank/users/gnn/svn/FreeBSD.HEAD/.svn/arc/config".
>>> [0] <conduit> conduit.connect() <bytes = 403>
>>> [1] <http> https://reviews.freebsd.org/api/conduit.connect
<<< [1] <http> 430,834 us
<<< [0] <conduit> 431,161 us
>>> [2] <exec> $ svn --xml status 'create'
<<< [2] <exec> 24,186 us
>>> [3] <event> diff.didCollectChanges <listeners = 0>
<<< [3] <event> 104 us
>>> [4] <conduit> differential.query() <bytes = 296>
>>> [5] <http> https://reviews.freebsd.org/api/differential.query
<<< [5] <http> 148,374 us
<<< [4] <conduit> 148,622 us

[2015-06-25 15:21:01] EXCEPTION: (ConduitClientException) ERR-CONDUIT-CALL: API Method "differential.query" does not define these parameters: 'arcanistProjects'. at [<phutil>/src/conduit/ConduitFuture.php:54]
  #0 ConduitFuture::didReceiveResult(array) called at [<phutil>/src/future/FutureProxy.php:60]
  #1 FutureProxy::getResult() called at [<phutil>/src/future/FutureProxy.php:37]
  #2 FutureProxy::resolve() called at [<phutil>/src/conduit/ConduitClient.php:24]
  #3 ConduitClient::callMethodSynchronous(string, array) called at [<arcanist>/src/repository/api/ArcanistSubversionAPI.php:659]
  #4 ArcanistSubversionAPI::loadWorkingCopyDifferentialRevisions(ConduitClient, array) called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:1446]
  #5 ArcanistDiffWorkflow::buildCommitMessage() called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:433]
  #6 ArcanistDiffWorkflow::run() called at [<arcanist>/scripts/arcanist.php:338]