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// Copyright 2021 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.
// Verify that we get an empty type set (not just an error)
// when using an invalid ~A.
package p
type A int
type C interface {
~ /* ERROR "invalid use of ~" */ A
}
func f[_ C]() {}
func g[_ interface{ C }]() {}
func h[_ C | int]() {}
func _() {
_ = f[int /* ERROR "cannot satisfy C (empty type set)" */]
_ = g[int /* ERROR "cannot satisfy interface{C} (empty type set)" */]
_ = h[int]
}