message: communicate bootstrapper failure to the outside
diff: @@ -236,7 +236,8 @@ async function main() {
  } catch (exception) {
  console.log("Failure:");
  console.error(exception);
  - console.error((<Error>exception).stack)
  + console.error((<Error>exception).stack);
  + process.exit(1);
  }
  }
  