// compile // Copyright 2016 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package y type symSet []int //go:noinline func (s symSet) len() (r int) { return 0 } func f(m map[int]symSet) { var symSet []int for _, x := range symSet { m[x] = nil } }