arc diff --create devel/pybugz --trace
libphutil loaded from '/usr/local/lib/php/libphutil/src'.
arcanist loaded from '/usr/local/lib/php/arcanist/src'.
Config: Reading user configuration file "/home/user/.arcrc"...
Config: Did not find system configuration at "/etc/arcconfig".
Working Copy: Reading .arcconfig from "/usr/home/user/repos/freebsd/ports/.arcconfig".
Working Copy: Path "/usr/home/user/repos/freebsd/ports" is part of `svn` working copy "/usr/home/user/repos/freebsd/ports".
Working Copy: Project root is at "/usr/home/user/repos/freebsd/ports".
Config: Did not find local configuration at "/usr/home/user/repos/freebsd/ports/.svn/arc/config".
>>> [0] <conduit> user.whoami() <bytes = 117>
>>> [1] <http> https://reviews.freebsd.org/api/user.whoami
<<< [1] <http> 894,695 us
<<< [0] <conduit> 917,635 us
>>> [2] <exec> $ svn --xml status 'devel/pybugz'
<<< [2] <exec> 21,466 us
>>> [3] <event> diff.didCollectChanges <listeners = 0>
<<< [3] <event> 102 us
>>> [4] <event> diff.willBuildMessage <listeners = 0>
<<< [4] <event> 70 us
>>> [5] <conduit> differential.getcommitmessage() <bytes = 196>
>>> [6] <http> https://reviews.freebsd.org/api/differential.getcommitmessage
<<< [6] <http> 243,551 us
<<< [5] <conduit> 243,911 us

[2015-06-26 02:58:20] EXCEPTION: (ConduitClientException) ERR-CONDUIT-CORE: Invalid parameter information was passed to method 'differential.getcommitmessage'. at [<phutil>/src/conduit/ConduitFuture.php:58]
arcanist(), phutil()
  #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:58]
  #3 ConduitClient::callMethodSynchronous(string, array) called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:1608]
  #4 ArcanistDiffWorkflow::getCommitMessageFromUser() called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:1511]
  #5 ArcanistDiffWorkflow::buildCommitMessage() called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:460]
  #6 ArcanistDiffWorkflow::run() called at [<arcanist>/scripts/arcanist.php:382]