From b2105e32c7a41a131cfa99af35799a34ab1dda90 Mon Sep 17 00:00:00 2001
From: Michal Ceresna <michal.ceresna@gmail.com>
Date: Fri, 10 Feb 2017 15:53:19 +0100
Subject: [PATCH] fixed exception when refreshing individual Ad Units and
 bidder responds slowly

---
 src/bidmanager.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/bidmanager.js b/src/bidmanager.js
index 1996e52d2c72..d3ee1ab7d79b 100644
--- a/src/bidmanager.js
+++ b/src/bidmanager.js
@@ -46,7 +46,7 @@ function bidsBackAdUnit(adUnitCode) {
     .map(request => request.bids
       .filter(adUnitsFilter.bind(this, $$PREBID_GLOBAL$$._adUnitCodes))
       .filter(bid => bid.placementCode === adUnitCode))
-    .reduce(flatten)
+    .reduce(flatten, [])
     .map(bid => {
       return bid.bidder === 'indexExchange' ?
           bid.sizes.length :
@@ -64,7 +64,7 @@ function add(a, b) {
 function bidsBackAll() {
   const requested = $$PREBID_GLOBAL$$._bidsRequested
     .map(request => request.bids)
-    .reduce(flatten)
+    .reduce(flatten, [])
     .filter(adUnitsFilter.bind(this, $$PREBID_GLOBAL$$._adUnitCodes))
     .map(bid => {
       return bid.bidder === 'indexExchange' ?