From 45aee86eead1e9879550c5af7c3c576076fb606d Mon Sep 17 00:00:00 2001
From: Rob Garrison <wowmotty@gmail.com>
Date: Fri, 16 Nov 2018 07:46:13 -0600
Subject: [PATCH] Prevent JSON parse error

---
 background/update.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/background/update.js b/background/update.js
index 59268a14..c4ae8d5a 100644
--- a/background/update.js
+++ b/background/update.js
@@ -157,7 +157,7 @@
         // USO can't handle POST requests for style json
         return download(style.updateUrl, {body: null})
           // USO may not provide a correctly updated originalMd5 (#555)
-          .then(text => Object.assign(tryJSONparse(text), {originalMd5: md5}));
+          .then(text => Object.assign(tryJSONparse(text || '{}'), {originalMd5: md5}));
       });
     }