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// run -goexperiment noswissmap
// Copyright 2024 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
func nan() float64 {
var x, y float64
return x / y
}
func main() {
m := map[float64]int{}
// Make a small map with nan keys
for i := 0; i < 8; i++ {
m[nan()] = i
}
// Start iterating on it.
start := true
for _, v := range m {
if start {
// Add some more elements.
for i := 0; i < 10; i++ {
m[float64(i)] = i
}
// Now clear the map.
clear(m)
start = false
} else {
// We should never reach here.
panic(v)
}
}
}
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