// errorcheck
// Copyright 2015 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.
// Issue 9634: Structs are incorrectly unpacked when passed as an argument
// to append.
package main
func main() {
s := struct{
t []int
u int
}{}
_ = append(s, 0) // ERROR "must be a slice|must be slice"
}