// run // Copyright 2025 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 import ( "errors" "fmt" "os" ) func crashOnErr(err error) int { if err != nil { panic(err) } return 10 } func main() { defer func() { if recover() == nil { fmt.Println("failed to have expected panic") os.Exit(1) } }() s := make([]int, crashOnErr(errors.New("test error"))) println("unreachable: len(s) =", len(s)) }