Ensure _.has returns false for nested inherited properties. [closes #2073]

lodash.js

@@ -5086,10 +5086,16 @@
       var result = hasFunc(object, path);
       if (!result && !isKey(path)) {
         path = baseCastPath(path);
-        object = parent(object, path);
-        if (object != null) {
-          path = last(path);
-          result = hasFunc(object, path);
+
+        var index = -1,
+            length = path.length;
+
+        while (object != null && ++index < length) {
+          var key = path[index];
+          if (!(result = hasFunc(object, key))) {
+            break;
+          }
+          object = object[key];
         }
       }
       var length = object ? object.length : undefined;

test/test.js

@@ -7096,6 +7096,17 @@
       });
     });
 
+    QUnit.test('`_.' + methodName + '` should return `' + (isHas ? 'false' : 'true') + '` for nested inherited properties', function(assert) {
+      assert.expect(2);
+
+      function Foo() {}
+      Foo.prototype.a = { 'b': 1 };
+
+      lodashStable.each(['a.b', ['a', 'b']], function(path) {
+        assert.strictEqual(func(new Foo, path), !isHas);
+      });
+    });
+
     QUnit.test('`_.' + methodName + '` should return `true` for index values within bounds for arrays, `arguments` objects, and strings', function(assert) {
       assert.expect(1);