WebKit: JSC: uninitialized memory reference in arrayProtoFuncSplice

Here's a snippet of arrayProtoFuncSplice. EncodedJSValue JSCHOSTCALL arrayProtoFuncSpliceExecState exec ... result = JSArray::tryCreateForInitializationPrivatevm, exec-lexicalGlobalObject-arrayStructureForIndexingTypeDuringAllocationArrayWithUndecided, actualDeleteCount; if UNLIKELY!result...