From da9758c2f3e478ab311be61378647a89f44a22b4 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Fri, 30 Nov 2012 23:16:39 -0800
Subject: [PATCH] =?UTF-8?q?Ensure=20`bound`=20result=20of=20`=5F.bind(func?=
 =?UTF-8?q?,=20=E2=80=A6)`=20is=20an=20instance=20of=20`bound`=20and=20`fu?=
 =?UTF-8?q?nc`.?=
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Former-commit-id: d8176ad5eb45a3d675617676fc1eee4d9cbd6ebc
---
 lodash.js    | 16 ++++++++--------
 test/test.js |  8 ++++++++
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/lodash.js b/lodash.js
index 8348ccd5e..e90d3cccd 100644
--- a/lodash.js
+++ b/lodash.js
@@ -609,19 +609,19 @@
           : partialArgs;
       }
       if (this instanceof bound) {
-        // get `func` instance if `bound` is invoked in a `new` expression
-        noop.prototype = func.prototype;
-        thisBinding = new noop;
-
         // mimic the constructor's `return` behavior
         // http://es5.github.com/#x13.2.2
-        var result = func.apply(thisBinding, args);
-        return isObject(result)
-          ? result
-          : thisBinding
+        var result = func.apply(this, args);
+        return isObject(result) ? result : this;
       }
       return func.apply(thisBinding, args);
     }
+    if (func && func.prototype) {
+      // ensure `new bound` is an instance of `bound` and `func`
+      noop.prototype = func.prototype;
+      bound.prototype = new noop
+      noop.prototype = null;
+    }
     return bound;
   }
 
diff --git a/test/test.js b/test/test.js
index 23445e144..d752f1224 100644
--- a/test/test.js
+++ b/test/test.js
@@ -209,6 +209,14 @@
       bound(['b'], 'c');
       deepEqual(args, ['a', ['b'], 'c']);
     });
+
+    test('ensure `new bound` is an instance of `bound` and `func`', function() {
+      var func = function() {},
+          bound = _.bind(func, {}),
+          instance = new bound;
+
+      ok(instance instanceof bound && instance instanceof func);
+    });
   }());
 
   /*--------------------------------------------------------------------------*/