From 26e2f7212f65f88f39976eb1c194f9dc94f4c1d2 Mon Sep 17 00:00:00 2001
From: Mike Ralphson <mike.ralphson@gmail.com>
Date: Fri, 19 May 2023 08:28:46 +0100
Subject: [PATCH] fixl: hardening against reference error in tables.js

---
 src/tables.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/tables.js b/src/tables.js
index e4fd987..fcffad0 100644
--- a/src/tables.js
+++ b/src/tables.js
@@ -59,6 +59,7 @@ rules.tableSection = {
 // - and every cell is a TH
 function isHeadingRow (tr) {
   var parentNode = tr.parentNode
+  if (!parentNode) return false
   return (
     parentNode.nodeName === 'THEAD' ||
     (