Inconsistent function hoisting in for...in

• Component: JavaScriptCore
• Status: NEW ---

Executing following code :
-----------------------------------------
var a = new Array(1);
for (var i in a){
	print("BT_FLAG");
	function v9() {
	}
}
print(typeof v9);
-----------------------------------------
Output of JavaScriptCore :
function

However, output of other js engines(v8, ch, spm) is :
undefined

BT group
2018.08.26