[2016-07-17 13:06:07] EXCEPTION: (ArcanistDifferentialCommitMessageParserException) Error parsing field "Reviewers": The objects you have listed include objects which do not exist (Spies:). at [<arcanist>/src/differential  /ArcanistDifferentialCommitMessage.php:54]
arcanist(head=master, ref.master=4eb952277950), phutil(head=master, ref.master=ff84abc7d857)
#0 ArcanistDifferentialCommitMessage::pullDataFromConduit(ConduitClient) called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:1795]
#1 ArcanistDiffWorkflow::getCommitMessageFromRevision(string) called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:1527]
#2 ArcanistDiffWorkflow::buildCommitMessage() called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:469]
#3 ArcanistDiffWorkflow::run() called at [<arcanist>/scripts/arcanist.php:394]

Try using English (US) when submitting diffs. See T11319

In D16310#190715, @chad wrote:

Try using English (US) when submitting diffs. See T11319

How can I do that? I used the arc of the repository. I can't use my global install of arc. I get the error:

Usage Exception: You are trying to run one copy of Arcanist on another copy of Arcanist. This operation is not supported. To execute Arcanist operations against this working copy, run `./bin/arc` (from the current working copy) not some other copy of 'arc' (you ran one from '/usr/share/arcanist').

I presume since the error is related to using pirate English, that you set your language on this install to pirate English. I can't think of any other way "spies" is appearing in your commit message. You can also just remove "spies:"

Fixed the commit's message