fn f() {
	unsafe {
		goto f1 // forward
		goto f2
		f1:
		goto a1
		_ = fn () {
			goto f1 // the `f1` label is not available here; it is in the outer scope
			goto f2 // same with `f2`
			goto a1 // this is ok
			a1:
			goto a1
		}
		f2:
		goto a1
		goto f1 // back
		goto f2
	}
}

fn g() {
	unsafe {
		goto g1 // forward
		g1:
		goto f1
		goto a1
		goto g1 // back
		goto undefined
	}
}

// implicit main
unsafe {
	goto m1
	m1:
	goto m1
}