https://bugs.webkit.org/show_bug.cgi?id=97593

Reviewed by Geoff Garen & Filip Pizlo.

Source/JavaScriptCore: 

* runtime/JSObject.cpp:
(JSC::JSObject::putByIndexBeyondVectorLength):
    - Check for self properties in the sparse map - if present, don't examine the protochain.

LayoutTests: 

* fast/js/script-tests/array-defineOwnProperty.js:
(Object.defineProperty):
(set Object.defineProperty):
    - Added test case.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@129548 268f45cc-cd09-0410-ab3c-d52691b4dbfc