closes #2562

src/controllers/admin/users.js

@@ -35,6 +35,11 @@ function getUsers(set, req, res, next) {
 		if (err) {
 			return next(err);
 		}
+
+		users = users.filter(function(user) {
+			return user && parseInt(user.uid, 10);
+		});
+
 		res.render('admin/manage/users', {
 			search_display: 'hidden',
 			loadmore_display: 'block',

src/user.js

@@ -244,7 +244,7 @@ var	async = require('async'),
 				user['email:confirmed'] = parseInt(user['email:confirmed'], 10) === 1;
 			});
 
-			callback(err, results.userData);
+			callback(null, results.userData);
 		});
 	};
 

src/user/delete.js

@@ -11,6 +11,9 @@ var async = require('async'),
 module.exports = function(User) {
 
 	User.delete = function(uid, callback) {
+		if (!parseInt(uid, 10)) {
+			return callback(new Error('[[error:invalid-uid]]'));
+		}
 		async.waterfall([
 			function(next) {
 				deletePosts(uid, next);
@@ -52,7 +55,11 @@ module.exports = function(User) {
 					db.deleteObjectField('userslug:uid', userData.userslug, next);
 				},
 				function(next) {
+					if (userData.email) {
 						db.deleteObjectField('email:uid', userData.email.toLowerCase(), next);
+					} else {
+						next();
+					}
 				},
 				function(next) {
 					db.sortedSetsRemove([