From 6bff374e9155ff9ca7156707cb68624b685e2ed5 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Sun, 11 Oct 2015 23:28:41 -0700
Subject: [PATCH] Ensure `_.intersectionBy` doesn't treat `iteratee` as an
 empty array.

---
 lodash.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lodash.js b/lodash.js
index 54605855d..0898a13f2 100644
--- a/lodash.js
+++ b/lodash.js
@@ -5457,6 +5457,8 @@
 
       if (iteratee === last(mapped)) {
         iteratee = undefined;
+      } else {
+        mapped.pop();
       }
       return (mapped.length && mapped[0] === arrays[0])
         ? baseIntersectionBy(mapped, getIteratee(iteratee))