Shouldn't `await using` early throw for non-disposable objects?

[PaperStrike]

In #180, the [Symbol.dispose] method is wrapped when hint is 'async-dispose', even if the method is undefined. This bypasses the outer check in CreateDisposableResource, where it would typically trigger a TypeError for undefined method. I find this behavior unexpected, as the original issue #179 did not intend to alter the behavior of await using / AsyncDisposableStack.use in a way that it would no longer throw errors for non-disposable values before usage but only when disposing.

[rbuckton]

It is not necessary to throw here, GetMethod does that for us.

[rbuckton]

I misspoke, you are correct that GetMethod will return undefined when the function is null or undefined, which is not the intent of that change. Thank you for pointing out the discrepancy.