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
9import "math"
10
11var doNotFold = 18446744073709549568.0
12
13func main() {
14	if math.Trunc(doNotFold) != doNotFold {
15		panic("big (over 2**63-1) math.Trunc is incorrect")
16	}
17}
18