From afab3ae5fb435b8b8863ad2991ac3f23c1a4b63b Mon Sep 17 00:00:00 2001
From: Ansis Brammanis <ansis@mapbox.com>
Date: Sun, 30 Jun 2019 13:35:46 -0400
Subject: [PATCH] fix #8411, fetch in case of cache error

---
 src/util/ajax.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/util/ajax.js b/src/util/ajax.js
index 374be504772..da2b324463f 100644
--- a/src/util/ajax.js
+++ b/src/util/ajax.js
@@ -111,7 +111,11 @@ function makeFetchRequest(requestParameters: RequestParameters, callback: Respon
 
     const validateOrFetch = (err, cachedResponse, responseIsFresh) => {
         if (err) {
-            return callback(err);
+            // Do fetch in case of cache error.
+            // HTTP pages in Edge trigger a security error that can be ignored.
+            if (err.message !== 'SecurityError') {
+                console.warn(err);
+            }
         }
 
         if (cachedResponse && responseIsFresh) {