From 215a41b28a130c3868365a346205bb06270fadfd Mon Sep 17 00:00:00 2001
From: Mike Lambert <mlambert@gmail.com>
Date: Mon, 19 Sep 2016 19:16:02 -0400
Subject: [PATCH] Allow Promise to display error strings and not just error
 objects.

---
 Libraries/Promise.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Libraries/Promise.js b/Libraries/Promise.js
index 7b52e135cc33f9..f17650c618119f 100644
--- a/Libraries/Promise.js
+++ b/Libraries/Promise.js
@@ -17,7 +17,10 @@ if (__DEV__) {
   require('promise/setimmediate/rejection-tracking').enable({
     allRejections: true,
     onUnhandled: (id, error = {}) => {
-      const {message = null, stack = null} = error;
+      let {message = null, stack = null} = error;
+      if (typeof error === 'string' || error instanceof String) {
+        message = error;
+      }
       const warning =
         `Possible Unhandled Promise Rejection (id: ${id}):\n` +
         (message == null ? '' : `${message}\n`) +