From 9b385eac4ff667277f5d3e26406a477a3e65eb9d Mon Sep 17 00:00:00 2001
From: Dimitris - Rafail Katsampas <katsampasdr@gmail.com>
Date: Thu, 4 Nov 2021 18:46:53 +0200
Subject: [PATCH] fix: Do not call `assignDeep` for `null` values.

---
 lib/util.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/util.js b/lib/util.js
index d9b3d20..98d99c5 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -84,7 +84,7 @@ function assignDeep(object, value) {
   const copy = {};
   for (const key in object) {
     copy[key] =
-      typeof object[key] === 'object' ? assignDeep(object[key], value) : value;
+      typeof object[key] === 'object' && !isNullish(object[key]) ? assignDeep(object[key], value) : value;
   }
   return copy;
 }