libphutil loaded from 'C:\src\libphutil\src'.
arcanist loaded from 'C:\src\arc\src'.
Config: Reading user configuration file "C:\Users\user\AppData\Roaming/.arcrc"...
Config: Did not find system configuration at "C:\ProgramData\Phabricator/Arcanist/config".
Working Copy: Reading .arcconfig from "C:\src\Admin/.arcconfig".
Working Copy: Path "C:\src\Admin" is part of `git` working copy "C:\src\Admin".
Working Copy: Project root is at "C:\src\Admin".
Config: Did not find local configuration at "C:\src\Admin\.git\arc/config".
Loading phutil library from 'C:\src\Admin\.arclib\arc-diff-admin-tests\src'...
>>> [0] <exec> $ where "git"
<<< [0] <exec> 122,481 us
Working Copy: No candidate locations for .arcconfig from this working directory.
Working Copy: Path "C:\src\arc" is not in any working copy.

[2015-12-02 13:12:57] EXCEPTION: (Exception) The current working directory is not part of a working copy for a supported
version control system (Git, Subversion or Mercurial). at [<arcanist>\src\repository\api\ArcanistRepositoryAPI.php:85]
arc-diff-admin-tests(), arcanist(head=master, ref.master=c844669326ed), phutil(head=master, ref.master=59f5a8d2bb82)
  #0 ArcanistRepositoryAPI::newAPIFromConfigurationManager(ArcanistConfigurationManager) called at [<arcanist>\src\workf
low\ArcanistVersionWorkflow.php:47]
  #1 ArcanistVersionWorkflow::run() called at [<arcanist>\scripts\arcanist.php:382]