fix(debug): display error message when runner fails

Author: Tiago Ribeiro

lib/runFromLauncher.js

@@ -31,6 +31,10 @@ process.on('message', function(m) {
       var runner = new Runner(config);
       runner.run().then(function(exitCode) {
         process.exit(exitCode);
+      }).catch(function(err) {
+        console.log(err.message);
+
+        process.exit();
       });
       break;
     default: