From 654135dad00fc56e9ff5f248ea52c66f16b90205 Mon Sep 17 00:00:00 2001
From: Xotic750 <xotic750@gmail.com>
Date: Wed, 27 Jan 2016 13:00:11 +0100
Subject: [PATCH] Function#bind robustness.
 https://github.com/es-shims/es5-shim/issues/378

---
 es5-shim.js | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/es5-shim.js b/es5-shim.js
index 9a346c34..0f0498bd 100644
--- a/es5-shim.js
+++ b/es5-shim.js
@@ -45,7 +45,8 @@ var $Array = Array;
 var ArrayPrototype = $Array.prototype;
 var $Object = Object;
 var ObjectPrototype = $Object.prototype;
-var FunctionPrototype = Function.prototype;
+var $Function = Function;
+var FunctionPrototype = $Function.prototype;
 var $String = String;
 var StringPrototype = $String.prototype;
 var $Number = Number;
@@ -55,6 +56,7 @@ var array_splice = ArrayPrototype.splice;
 var array_push = ArrayPrototype.push;
 var array_unshift = ArrayPrototype.unshift;
 var array_concat = ArrayPrototype.concat;
+var array_join = ArrayPrototype.join;
 var call = FunctionPrototype.call;
 var apply = FunctionPrototype.apply;
 var max = Math.max;
@@ -226,7 +228,8 @@ defineProperties(FunctionPrototype, {
                 // 5. Return the result of calling the [[Construct]] internal
                 //   method of target providing args as the arguments.
 
-                var result = target.apply(
+                var result = apply.call(
+                    target,
                     this,
                     array_concat.call(args, array_slice.call(arguments))
                 );
@@ -255,7 +258,8 @@ defineProperties(FunctionPrototype, {
                 //   providing args as the arguments.
 
                 // equiv: target.call(this, ...boundArgs, ...args)
-                return target.apply(
+                return apply.call(
+                    target,
                     that,
                     array_concat.call(args, array_slice.call(arguments))
                 );
@@ -285,7 +289,7 @@ defineProperties(FunctionPrototype, {
         // for ex.) all use of eval or Function costructor throws an exception.
         // However in all of these environments Function.prototype.bind exists
         // and so this code will never be executed.
-        bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this, arguments); }')(binder);
+        bound = $Function('binder', 'return function (' + array_join.call(boundArgs, ',') + '){ return binder.apply(this, arguments); }')(binder);
 
         if (target.prototype) {
             Empty.prototype = target.prototype;