From 036e4f66b801a3e4c73f4dd8419d858a12cc4ac5 Mon Sep 17 00:00:00 2001
From: Steven Orvell <sorvell@google.com>
Date: Fri, 4 May 2018 16:24:41 -0700
Subject: [PATCH] Fix for browsers that don't have input.labels.

---
 lib/utils/gestures.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/utils/gestures.js b/lib/utils/gestures.js
index 3a87b953d1..c195032a1b 100644
--- a/lib/utils/gestures.js
+++ b/lib/utils/gestures.js
@@ -125,7 +125,7 @@ function canBeLabelled(el) {
  * @return {!Array<!HTMLLabelElement>} Relevant label for `el`
  */
 function matchingLabels(el) {
-  let labels = Array.prototype.slice.call(/** @type {HTMLInputElement} */(el).labels);
+  let labels = Array.prototype.slice.call(/** @type {HTMLInputElement} */(el).labels || []);
   // IE doesn't have `labels` and Safari doesn't populate `labels`
   // if element is in a shadowroot.
   // In this instance, finding the non-ancestor labels is enough,