From 65bdef42a187496425eacf73dfa4119a28400552 Mon Sep 17 00:00:00 2001
From: Dan Stillman <dstillman@zotero.org>
Date: Wed, 15 Aug 2018 02:35:09 -0400
Subject: [PATCH] Fix double PDF when adding arXiv paper with Add Item by
 Identifier

---
 chrome/content/zotero/lookup.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/chrome/content/zotero/lookup.js b/chrome/content/zotero/lookup.js
index c6371b1ef7..9218dcd81c 100644
--- a/chrome/content/zotero/lookup.js
+++ b/chrome/content/zotero/lookup.js
@@ -68,9 +68,11 @@ var Zotero_Lookup = new function () {
 					libraryID,
 					collections: collection ? [collection.id] : false
 				});
+				
 				// If we don't yet have a file, check for available PDFs
 				if (Zotero.Prefs.get('downloadAssociatedFiles')
-						&& !newItems.find(x => x.isImportedAttachment())
+						&& newItems[0]
+						&& !newItems[0].numPDFAttachments()
 						// TEMP: Limit to dev builds
 						&& Zotero.isDevBuild) {
 					try {