From 85563c3e63859ad74cccbd1a075df39b1c2576ed Mon Sep 17 00:00:00 2001
From: David Anson <david@dlaa.me>
Date: Tue, 24 Nov 2020 13:01:19 -0800
Subject: [PATCH] Handle missing token.map for th_open tokens (breaking) change
 in markdown-it v12.

---
 lib/markdownlint.js                     | 29 ++++++++++++++++---------
 test/table-issue-with-markdown-it-12.md |  7 ++++++
 2 files changed, 26 insertions(+), 10 deletions(-)
 create mode 100644 test/table-issue-with-markdown-it-12.md

diff --git a/lib/markdownlint.js b/lib/markdownlint.js
index b64cf969..b881e03f 100644
--- a/lib/markdownlint.js
+++ b/lib/markdownlint.js
@@ -176,18 +176,27 @@ function removeFrontMatter(content, frontMatter) {
  * @returns {void}
  */
 function annotateTokens(tokens, lines) {
-  let tbodyMap = null;
+  let tableMap = null;
   tokens.forEach(function forToken(token) {
-    // Handle missing maps for table body
-    if (token.type === "tbody_open") {
-      tbodyMap = token.map.slice();
-    } else if ((token.type === "tr_close") && tbodyMap) {
-      tbodyMap[0]++;
-    } else if (token.type === "tbody_close") {
-      tbodyMap = null;
+    // Handle missing maps for table head/body
+    if (
+      (token.type === "thead_open") ||
+      (token.type === "tbody_open")
+    ) {
+      tableMap = token.map.slice();
+    } else if (
+      (token.type === "tr_close") &&
+      tableMap
+    ) {
+      tableMap[0]++;
+    } else if (
+      (token.type === "thead_close") ||
+      (token.type === "tbody_close")
+    ) {
+      tableMap = null;
     }
-    if (tbodyMap && !token.map) {
-      token.map = tbodyMap.slice();
+    if (tableMap && !token.map) {
+      token.map = tableMap.slice();
     }
     // Update token metadata
     if (token.map) {
diff --git a/test/table-issue-with-markdown-it-12.md b/test/table-issue-with-markdown-it-12.md
new file mode 100644
index 00000000..b5e7d4fd
--- /dev/null
+++ b/test/table-issue-with-markdown-it-12.md
@@ -0,0 +1,7 @@
+# table-issue-with-markdown-it-12
+
+| `CLIEngine`                                  | `ESLint`                           |
+| :------------------------------------------- | :--------------------------------- |
+| `executeOnFiles(patterns)`                   | `lintFiles(patterns)`              |
+
+<!-- markdownlint-disable-file MD013 -->