Bug 216817

According to ES10.0, "%TypedArray%.prototype.lastIndexOf" is a distinct function that implements the same algorithm as "Array.prototype.lastIndexOf". And it's optimization must not introduce any observable changes in the specified behaviour of the algorithm. But these two methods acts differently when no argument is passed. Is this an issue about javascriptCore?

#### version
dbae081


#### command
webkit/WebKitBuild/Debug/bin/jsc testcase.js


#### testcase
var v1 = [];
print(v1.lastIndexOf());

var v2 = new Uint8Array();
print(v2.lastIndexOf());


#### output
-1
TypeError: Expected at least one argument



#### expected output
-1
-1


contributor:Yuan Wang