phacility/phabricator · error · Exception

Unknown Mercurial key namespace '%s', with key '%s' (%s -> %

Error message

Unknown Mercurial key namespace '%s', with key '%s' (%s -> %s). Rejecting push.

What it means

Error "Unknown Mercurial key namespace '%s', with key '%s' (%s -> %s). Rejecting push." thrown in phacility/phabricator.

Source

Thrown at src/applications/diffusion/engine/DiffusionCommitHookEngine.php:985

      // just ignore these, as they don't seem to represent anything
      // interesting.
      return array();
    }

    $key_name = getenv('HG_KEY');

    $key_old = getenv('HG_OLD');
    if (!strlen($key_old)) {
      $key_old = null;
    }

    $key_new = getenv('HG_NEW');
    if (!strlen($key_new)) {
      $key_new = null;
    }

    if ($key_namespace !== 'bookmarks') {
      throw new Exception(
        pht(
          "Unknown Mercurial key namespace '%s', with key '%s' (%s -> %s). ".
          "Rejecting push.",
          $key_namespace,
          $key_name,
          coalesce($key_old, pht('null')),
          coalesce($key_new, pht('null'))));
    }

    if ($key_old === $key_new) {
      // We get a callback when the bookmark doesn't change. Just ignore this,
      // as it's a no-op.
      return array();
    }

    $ref_flags = 0;
    $merge_base = null;
    if ($key_old === null) {

View on GitHub (pinned to 5720a38cfe)

When it happens

Trigger: Thrown at src/applications/diffusion/engine/DiffusionCommitHookEngine.php:985 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of phacility/phabricator@5720a38cfe (2026-08-21). Data as JSON: /api/errors/95217f73d12a1c1b. Report an issue: GitHub.