Typescript: Boolean() function is not working with type-guard.

[rockmandash]

When I call Boolean() function to test a union type, it doesn't have type-guard working.
Here is a simple code and VSCode screenshot.

function test(number: number | undefined) {
  if (Boolean(number)) {
    console.log(number)
  }
}

[jack-williams]

Duplicate of #16655, and there is an open PR fixing this here: #29955