From 6f2e47ff26ed6f4eb8f6598e92faa409b43485fa Mon Sep 17 00:00:00 2001
From: Alex Henkel <alehenkel17@gmail.com>
Date: Sat, 25 Feb 2017 14:16:18 -0600
Subject: [PATCH] validate is a non-empty array after flatten

---
 lib/helpers/normalizeArgs.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/helpers/normalizeArgs.js b/lib/helpers/normalizeArgs.js
index a7e44d1..f5650b5 100644
--- a/lib/helpers/normalizeArgs.js
+++ b/lib/helpers/normalizeArgs.js
@@ -16,7 +16,10 @@ function normalizeArgs(registry, args) {
     return fn;
   }
 
-  return map(flatten(args), getFunction);
+  var flattenArgs = flatten(args);
+  assert(flattenArgs.length, 'Arguments must be a non-empty array or string');
+
+  return map(flattenArgs, getFunction);
 }
 
 module.exports = normalizeArgs;