struct St {
mut:
	a int
}

fn (shared s St) r(x St) {
}

fn (s St) m(shared x St) {
}

fn f(w int, shared x St) {
}

fn g() {
	shared x := St{
		a: 5
	}
	lock x {
		x.r(x)
		x.m(x)
		f(0, x)
	}
}