generator returns a value

Why this fires¶

A generator used return value. Generator termination and yielded items are separate: return may stop a generator, but its value is never an iterator item.

fn* values() -> int { return 1 } // TE222

Fix it¶

Use yield to produce the value, or use a bare return to stop early:

fn* values() -> int {
    yield 1
    return
}