From d9b5fd78c90e334be86799be818a6256469e96d2 Mon Sep 17 00:00:00 2001
From: Dan Stillman <dstillman@zotero.org>
Date: Tue, 21 Mar 2017 04:58:09 -0400
Subject: [PATCH] Fix error from empty strings in data generator

---
 chrome/content/zotero/tools/data_generator.html | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/chrome/content/zotero/tools/data_generator.html b/chrome/content/zotero/tools/data_generator.html
index 5cadf4a1e..e87f9309a 100644
--- a/chrome/content/zotero/tools/data_generator.html
+++ b/chrome/content/zotero/tools/data_generator.html
@@ -79,13 +79,16 @@
 			
 			var rand = Zotero.Utilities.rand;
 			function randStr(min, max) {
-				return Zotero.Utilities.randomString(
-					rand(min, max),
-					"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
-						+ "éØü"
-						+ "漢字"
-						+ "                    "
-				);
+				var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+					+ "éØü"
+					+ "漢字"
+					+ "                    "
+				do {
+					var rnd = Zotero.Utilities.randomString(rand(min, max), chars);
+				}
+				// Make sure string isn't all spaces
+				while (rnd.trim().length == 0);
+				return rnd;
 			}
 			
 			function addCreatorOfType(creators, creatorType) {