| // run |
| |
| // Copyright 2026 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 main |
| |
| var n = 1 |
| |
| //go:noinline |
| func bug(a func(int)) { |
| m := int64(len("x"[:n])) - (1 << 62) |
| for i, j := int64(-1<<63), 0; i < m; i, j = i+(1<<62), j+1 { |
| if j == 2 { |
| a(3) |
| return |
| } |
| } |
| a(2) |
| } |
| |
| func main() { |
| var r int |
| var set bool |
| bug(func(x int) { |
| if set { |
| panic("called twice") |
| } |
| set = true |
| r = x |
| }) |
| if !set { |
| panic("not called") |
| } |
| if r != 2 { |
| panic("got wrong result") |
| } |
| } |
