From 461f142db0e9111672e5528770546052a7a1ec30 Mon Sep 17 00:00:00 2001
From: alpaca-tc <alpaca-tc@alpaca.tc>
Date: Wed, 1 Dec 2021 21:54:02 +0900
Subject: [PATCH] stringToUtf8Bytes may return null

---
 doublearray.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doublearray.js b/doublearray.js
index 149ef05..88b97b3 100644
--- a/doublearray.js
+++ b/doublearray.js
@@ -551,6 +551,10 @@
 
         var buffer = stringToUtf8Bytes(key);
 
+        if (buffer === null) {
+          return []
+        }
+
         var parent = ROOT_ID;
         var child = NOT_FOUND;