From 2498bccb500f34b7549e52fb268177d6794d9b60 Mon Sep 17 00:00:00 2001
From: Jeremy Ashkenas <jashkenas@gmail.com>
Date: Tue, 22 Mar 2011 10:44:07 -0400
Subject: [PATCH] changing order of operations to force an errror when _.bind
 -ing null or undefined values.

---
 underscore.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/underscore.js b/underscore.js
index c627740a0..00f6c26f5 100644
--- a/underscore.js
+++ b/underscore.js
@@ -408,8 +408,9 @@
   // Create a function bound to a given object (assigning `this`, and arguments,
   // optionally). Binding with arguments is also known as `curry`.
   // Delegates to **ECMAScript 5**'s native `Function.bind` if available.
+  // We check for `func.bind` first, to fail fast when `func` is undefined.
   _.bind = function(func, obj) {
-    if (nativeBind && func.bind === nativeBind) return func.bind.apply(func, slice.call(arguments, 1));
+    if (func.bind === nativeBind && nativeBind) return func.bind.apply(func, slice.call(arguments, 1));
     var args = slice.call(arguments, 2);
     return function() {
       return func.apply(obj, args.concat(slice.call(arguments)));