Source file test/fixedbugs/issue29190.go

     1  // run
     2  
     3  // Copyright 2018 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  package main
     8  
     9  import (
    10  	"strings"
    11  )
    12  
    13  type T struct{}
    14  
    15  const maxInt = int(^uint(0) >> 1)
    16  
    17  func main() {
    18  	s := make([]T, maxInt)
    19  	shouldPanic("len out of range", func() { s = append(s, T{}) })
    20  	var oneElem = make([]T, 1)
    21  	shouldPanic("len out of range", func() { s = append(s, oneElem...) })
    22  }
    23  
    24  func shouldPanic(str string, f func()) {
    25  	defer func() {
    26  		err := recover()
    27  		if err == nil {
    28  			panic("did not panic")
    29  		}
    30  		s := err.(error).Error()
    31  		if !strings.Contains(s, str) {
    32  			panic("got panic " + s + ", want " + str)
    33  		}
    34  	}()
    35  
    36  	f()
    37  }
    38  

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