From 2515cd215f81e8533281664e83538cbc2fc9d103 Mon Sep 17 00:00:00 2001
From: Russell Bicknell <bicknellr@google.com>
Date: Tue, 17 Nov 2020 11:58:44 -0800
Subject: [PATCH] Upstream internal error suppression.

Co-authored-by: Phil Harnish <philharnish@gmail.com>
---
 lib/utils/gestures.js | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/lib/utils/gestures.js b/lib/utils/gestures.js
index 24a620c784..8c5477d74f 100644
--- a/lib/utils/gestures.js
+++ b/lib/utils/gestures.js
@@ -143,13 +143,20 @@ function matchingLabels(el) {
   // as the mouseCancellor code will handle ancstor labels
   if (!labels.length) {
     labels = [];
-    let root = el.getRootNode();
-    // if there is an id on `el`, check for all labels with a matching `for` attribute
-    if (el.id) {
-      let matching = root.querySelectorAll(`label[for = ${el.id}]`);
-      for (let i = 0; i < matching.length; i++) {
-        labels.push(/** @type {!HTMLLabelElement} */(matching[i]));
+    try {
+      let root = el.getRootNode();
+      // if there is an id on `el`, check for all labels with a matching `for` attribute
+      if (el.id) {
+        let matching = root.querySelectorAll(`label[for = ${el.id}]`);
+        for (let i = 0; i < matching.length; i++) {
+          labels.push(/** @type {!HTMLLabelElement} */(matching[i]));
+        }
       }
+    } catch (e) {
+      // Either:
+      // 1. el.getRootNode() failed.
+      // 2. el.id cannot be used in `querySelectorAll`
+      // In both cases, do nothing.
     }
   }
   return labels;