From 1a779bb7aa16e20a3abcd18c505cfecfa1f9c22a Mon Sep 17 00:00:00 2001
From: Dan Stillman <dstillman@zotero.org>
Date: Mon, 23 Oct 2017 03:20:35 -0400
Subject: [PATCH] Fix "item._changed.creators is undefined" error at startup

This could occur if creator indexes needed to be corrected for an item.
---
 chrome/content/zotero/xpcom/data/items.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/chrome/content/zotero/xpcom/data/items.js b/chrome/content/zotero/xpcom/data/items.js
index 77860139a..c71c8532f 100644
--- a/chrome/content/zotero/xpcom/data/items.js
+++ b/chrome/content/zotero/xpcom/data/items.js
@@ -333,6 +333,9 @@ Zotero.Items = function() {
 			Zotero.debug("Fixing incorrect creator indexes for item " + item.libraryKey
 				+ " (" + numCreators + ", " + maxOrderIndex + ")", 2);
 			var i = numCreators;
+			if (!item._changed.creators) {
+				item._changed.creators = {};
+			}
 			while (i <= maxOrderIndex) {
 				item._changed.creators[i] = true;
 				i++;