From 2831e8be3ed83a36eaca8224bfc991d3bdf0f98d Mon Sep 17 00:00:00 2001
From: Dan Stillman <dstillman@zotero.org>
Date: Sun, 10 Jun 2018 02:49:17 -0400
Subject: [PATCH] Mendeley import: Fix "keys is undefined" error

An error would occur if a document existed in RemoteDocuments but not
Documents.
---
 chrome/content/zotero/import/mendeley/mendeleyImport.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/chrome/content/zotero/import/mendeley/mendeleyImport.js b/chrome/content/zotero/import/mendeley/mendeleyImport.js
index f2f17b5cf..9fb4a2447 100644
--- a/chrome/content/zotero/import/mendeley/mendeleyImport.js
+++ b/chrome/content/zotero/import/mendeley/mendeleyImport.js
@@ -427,6 +427,7 @@ Zotero_Import_Mendeley.prototype._getDocumentCollections = async function (group
 	);
 	for (let row of rows) {
 		let keys = map.get(row.documentId);
+		if (!keys) keys = [];
 		keys.push(folderKeys.get(row.folderId));
 		map.set(row.documentId, keys);
 	}