From 59d99fc0c7ea5b1161f267af3cf538b9aeeb05c4 Mon Sep 17 00:00:00 2001
From: Bart Butler <bart.c.butler@gmail.com>
Date: Tue, 28 Nov 2017 10:25:16 -0800
Subject: [PATCH] do not replace stack in async_proxy, add as workerStack

---
 src/worker/async_proxy.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/worker/async_proxy.js b/src/worker/async_proxy.js
index b1857d79..6a780206 100644
--- a/src/worker/async_proxy.js
+++ b/src/worker/async_proxy.js
@@ -67,7 +67,8 @@ AsyncProxy.prototype.onMessage = function(event) {
       if (msg.err) {
         // fail
         const err = new Error(msg.err);
-        err.stack = msg.stack || err.stack;
+        // add worker stack
+        err.workerStack = msg.stack;
         this.tasks[msg.id].reject(err);
       } else {
         // success