Type narrowing with unreachable code error

[Diverclaim]

Playground link
playground

Code

function weird() {
  function generateStringOrNumber(): string | number {
    if (Math.random() > 0.5) {
      return 42;
    } else {
      return "blabla";
    }
  }

  return; // this causes problems

  const value = generateStringOrNumber();
  if (typeof value !== "string") {
    const numberValue: number = value;
  }
}

Actual behaviour
Compiler error

Type 'string | number' is not assignable to type 'number'.
  Type 'string' is not assignable to type 'number'.(2322)

Expected behaviour
Should compile fine

Notes
Remove return in function, and it actually compiles fine.

[j-oliveras]

Duplicate of #33674 and #26914?

I only searched narrowing unreachable.