From f3eae89b33fbd729fb6c401b42daa672bdd1751c Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume.gomez@huawei.com>
Date: Mon, 30 May 2022 16:53:24 +0200
Subject: [PATCH] Fix invalid line number computation when clicking on
 something else than a line number

---
 src/librustdoc/html/static/js/source-script.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/librustdoc/html/static/js/source-script.js b/src/librustdoc/html/static/js/source-script.js
index aaac878d3a3..58c036e0b3c 100644
--- a/src/librustdoc/html/static/js/source-script.js
+++ b/src/librustdoc/html/static/js/source-script.js
@@ -205,6 +205,10 @@ const handleSourceHighlight = (function() {
 
     return ev => {
         let cur_line_id = parseInt(ev.target.id, 10);
+        // It can happen when clicking not on a line number span.
+        if (isNaN(cur_line_id)) {
+            return;
+        }
         ev.preventDefault();
 
         if (ev.shiftKey && prev_line_id) {