[sr5434]

Fixes #1691 by checking if the TypedArray's underlying ArrayBuffer is resizable, and throws an error if so. I also edited the error message when JS_PreventExtensions is false to be "Cannot prevent extensions", as this is more applicable to the widened set of reasons why the function might return false. Finally, I added a regression test.

[sr5434]

@saghul, would it be possible to get a review for this when you have a moment? If it's low priority, that's fine too.

[bnoordhuis]

Does the spec say anything about the appropriate course of action when the arraybuffer is detached (abuf->detached)?

[sr5434]

According to this website, methods are supposed to throw a typed error when the buffer is detached. When I test the following snippet:

const ab = new ArrayBuffer(16, { maxByteLength: 16 });
const ta = new Int8Array(ab);
const newBuff = ab.transfer();
Object.preventExtensions(ta);

both Node.JS and QuickJS agree that the error is "TypeError: Cannot prevent extensions", so it seems that this works for the detached case as well.