Unwrap-or operator doesn't allow optional in second position

[Chriscbr]

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I tried this:

bring cloud;

let x: num? = 5;
let y: num? = 10;
let z = x ?? y;

I expected this:

It compiles, and z will be type num?

Instead, this happened:

error: Expected type to be "num", but got "num?" instead
  --> test.w:5:14
  |
5 | let z = x ?? y;
  |              ^ Expected type to be "num", but got "num?" instead

Component:

Compiler

Wing Version:

0.5.139

Node.js Version:

18.12.1

Platform(s):

MacOS

Anything else?

No response

[Chriscbr]

Closing as duplicate of #1875