1// compile
2
3// Copyright 2020 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
7// Make sure NaN-NaN compiles correctly.
8
9package p
10
11func f() {
12	var st struct {
13		f    float64
14		_, _ string
15	}
16
17	f := 1e308
18	st.f = 2*f - 2*f
19}
20