mirror of
https://github.com/golang/go
synced 2024-11-18 23:44:43 -07:00
35 lines
799 B
Go
35 lines
799 B
Go
|
// $G $D/$F.go && $L $F.$A && ./$A.out
|
||
|
|
|
||
|
|
// Copyright 2011 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.
|
||
|
|
|
||
|
|
// Issue 2075
|
||
|
|
// A bug in select corrupts channel queues of failed cases
|
||
|
|
// if there are multiple waiters on those channels and the
|
||
|
|
// select is the last in the queue. If further waits are made
|
||
|
|
// on the channel without draining it first then those waiters
|
||
|
|
// will never wake up. In the code below c1 is such a channel.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
c1 := make(chan bool)
|
||
|
|
c2 := make(chan bool)
|
||
|
|
c3 := make(chan bool)
|
||
|
|
go func() { <-c1 }()
|
||
|
|
go func() {
|
||
|
|
select {
|
||
|
|
case <-c1:
|
||
|
|
panic("dummy")
|
||
|
|
case <-c2:
|
||
|
|
c3 <- true
|
||
|
|
}
|
||
|
|
<-c1
|
||
|
|
}()
|
||
|
|
go func() { c2 <- true }()
|
||
|
|
<-c3
|
||
|
|
c1 <- true
|
||
|
|
c1 <- true
|
||
|
|
}
|