From f6f765e52f33e6bff3977ccfe9fd2a1dc2288596 Mon Sep 17 00:00:00 2001
From: Yohan Boniface <yohanboniface@free.fr>
Date: Wed, 1 Mar 2023 17:35:07 +0100
Subject: [PATCH] Catch empty attribution in overlay

---
 umap/static/umap/js/umap.core.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/umap/static/umap/js/umap.core.js b/umap/static/umap/js/umap.core.js
index 30aaa4cb..c7afdb36 100644
--- a/umap/static/umap/js/umap.core.js
+++ b/umap/static/umap/js/umap.core.js
@@ -46,6 +46,7 @@ L.Util.escapeHTML = function (s) {
     return s.replace(/</gm, '&lt;');
 };
 L.Util.toHTML = function (r) {
+    if (!r) return '';
     var ii;
 
     // detect newline format