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      1 // run
      2 
      3 // Copyright 2014 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 func shouldPanic(f func()) {
     10         defer func() {
     11                 if recover() == nil {
     12                         panic("not panicking")
     13                 }
     14         }()
     15         f()
     16 }
     17 
     18 func f() {
     19         length := int(^uint(0) >> 1)
     20         a := make([]struct{}, length)
     21         b := make([]struct{}, length)
     22         _ = append(a, b...)
     23 }
     24 
     25 func main() {
     26 	shouldPanic(f)
     27 }
     28