phacility/phabricator · error · DiffusionCommitHookRejectException

DANGEROUS CHANGE: %s Dangerous change protection is enabled

Error message

DANGEROUS CHANGE: %s
Dangerous change protection is enabled for this repository.
Edit the repository configuration before making dangerous changes.

What it means

Error "DANGEROUS CHANGE: %s Dangerous change protection is enabled for this repository. Edit the repository configuration before making dangerous changes." thrown in phacility/phabricator.

Source

Thrown at src/applications/diffusion/engine/DiffusionCommitHookEngine.php:295

    $flag_dangerous = PhabricatorRepositoryPushLog::CHANGEFLAG_DANGEROUS;

    foreach ($ref_updates as $ref_update) {
      if (!$ref_update->hasChangeFlags($flag_dangerous)) {
        // This is not a dangerous change.
        continue;
      }

      // We either have a branch deletion or a non fast-forward branch update.
      // Format a message and reject the push.

      $message = pht(
        "DANGEROUS CHANGE: %s\n".
        "Dangerous change protection is enabled for this repository.\n".
        "Edit the repository configuration before making dangerous changes.",
        $ref_update->getDangerousChangeDescription());

      throw new DiffusionCommitHookRejectException($message);
    }
  }

  private function findContentUpdates(array $ref_updates) {
    assert_instances_of($ref_updates, 'PhabricatorRepositoryPushLog');

    $type = $this->getRepository()->getVersionControlSystem();
    switch ($type) {
      case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
        return $this->findGitContentUpdates($ref_updates);
      case PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL:
        return $this->findMercurialContentUpdates($ref_updates);
      case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
        return $this->findSubversionContentUpdates($ref_updates);
      default:
        throw new Exception(pht('Unsupported repository type "%s"!', $type));
    }
  }

View on GitHub (pinned to 5720a38cfe)

When it happens

Trigger: Thrown at src/applications/diffusion/engine/DiffusionCommitHookEngine.php:295 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/cb8c24fe222a9a12. Report an issue: GitHub.