From 1e3078d6c40381f30768d982b681d0851709b86c Mon Sep 17 00:00:00 2001
From: Rob Wu <rob@robwu.nl>
Date: Sat, 8 Aug 2015 21:41:33 +0200
Subject: [PATCH] Serialize errors before invoking postMessage

Serialize errors to make sure that the callback is still invoked when
an error is thrown.

Firefox:
"DataCloneError: The object could not be cloned."

Chrome:
"DataCloneError: Failed to execute 'postMessage' on 'WorkerGlobalScope': An object could not be cloned."
---
 src/shared/util.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/shared/util.js b/src/shared/util.js
index 7edd0c2dd..b003b4a92 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -1504,6 +1504,10 @@ function MessageHandler(name, comObj) {
             data: result
           });
         }, function (reason) {
+          if (reason instanceof Error) {
+            // Serialize error to avoid "DataCloneError"
+            reason = reason + '';
+          }
           comObj.postMessage({
             isReply: true,
             callbackId: data.callbackId,