From 3dd064ae962597b5c6660a541c3d863e09db4659 Mon Sep 17 00:00:00 2001
From: Anton Medvedev <anton@medv.io>
Date: Sat, 3 Nov 2018 22:29:34 +0700
Subject: [PATCH] Fix bug with expanding null var

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

diff --git a/fx.js b/fx.js
index 974a6c6..1ea78fd 100644
--- a/fx.js
+++ b/fx.js
@@ -89,6 +89,10 @@ module.exports = function start(input) {
   })
 
   function walk(v, cb, path = '') {
+    if (!v) {
+      return
+    }
+
     if (Array.isArray(v)) {
       cb(path)
       let i = 0