From 56898ec6a7a9d3e221860c4c94f0e16c3a9d1c35 Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Thu, 11 Mar 2021 21:13:42 +0100
Subject: [PATCH] Prevent JS error when there is no dependency or other crate
 documented

---
 src/librustdoc/html/static/main.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/librustdoc/html/static/main.js b/src/librustdoc/html/static/main.js
index d5071cec0c8..7827548aa1c 100644
--- a/src/librustdoc/html/static/main.js
+++ b/src/librustdoc/html/static/main.js
@@ -2955,7 +2955,11 @@ function defocusSearchBar() {
         enableSearchInput();
 
         var crateSearchDropDown = document.getElementById("crate-search");
-        crateSearchDropDown.addEventListener("focus", loadSearch);
+        // `crateSearchDropDown` can be null in case there is only crate because in that case, the
+        // crate filter dropdown is removed.
+        if (crateSearchDropDown) {
+            crateSearchDropDown.addEventListener("focus", loadSearch);
+        }
         var params = getQueryStringParams();
         if (params.search !== undefined) {
             loadSearch();