1// run
2
3// Copyright 2024 The Go Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7package main
8
9func main() {
10	env := func() func(*bool) func() int {
11		return func() func(*bool) func() int {
12			return func(ptr *bool) func() int {
13				return func() int {
14					*ptr = true
15					return 0
16				}
17			}
18		}()
19	}()
20
21	var ok bool
22	func(int) {}(env(&ok)())
23	if !ok {
24		panic("FAIL")
25	}
26}
27