From cd57d924bbb8d123f53a654c88e0c23ed08d677c Mon Sep 17 00:00:00 2001
From: Sammy Jelin <sjelin@gmail.com>
Date: Mon, 21 Mar 2016 15:15:16 -0700
Subject: [PATCH] fix(stacktrace): don not crash if beforeEach block is
 rejected without any stated reason

Closes #44
---
 index.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/index.js b/index.js
index d88d3ad..d29ce88 100644
--- a/index.js
+++ b/index.js
@@ -97,6 +97,10 @@ function wrapInControlFlow(globalFn, fnName) {
             }
           }, flow);
         }, 'Run ' + fnName + description + ' in control flow').then(seal(done), function(err) {
+          if (!err) {
+            err = new Error('Unknown Error');
+            err.stack = '';
+          }
           err.stack = err.stack + '\nFrom asynchronous test: \n' + driverError.stack;
           done.fail(err);
         });