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Source file test/fixedbugs/issue19201.go

Documentation: test/fixedbugs

     1  // run
     2  
     3  // Copyright 2017 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  	"encoding/binary"
    11  )
    12  
    13  var (
    14  	ch1 = make(chan int)
    15  	ch2 = make(chan int)
    16  
    17  	bin  = []byte("a\000\000\001")
    18  	want = binary.BigEndian.Uint32(bin)
    19  
    20  	c consumer = noopConsumer{}
    21  )
    22  
    23  type msg struct {
    24  	code uint32
    25  }
    26  
    27  type consumer interface {
    28  	consume(msg)
    29  }
    30  
    31  type noopConsumer struct{}
    32  
    33  func (noopConsumer) consume(msg) {}
    34  
    35  func init() {
    36  	close(ch1)
    37  }
    38  
    39  func main() {
    40  	var m msg
    41  	m.code = binary.BigEndian.Uint32(bin)
    42  
    43  	select {
    44  	case <-ch1:
    45  		c.consume(m)
    46  		if m.code != want {
    47  			// can not use m.code here, or it will work
    48  			panic("BigEndian read failed")
    49  		}
    50  	case <-ch2:
    51  	}
    52  }
    53  

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