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      1 // Copyright 2015 The Go Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 package race_test
      6 
      7 import (
      8 	"fmt"
      9 	"testing"
     10 )
     11 
     12 var issue12664 = "hi"
     13 
     14 func TestRaceIssue12664(t *testing.T) {
     15 	c := make(chan struct{})
     16 	go func() {
     17 		issue12664 = "bye"
     18 		close(c)
     19 	}()
     20 	fmt.Println(issue12664)
     21 	<-c
     22 }
     23 
     24 type MyI interface {
     25 	foo()
     26 }
     27 
     28 type MyT int
     29 
     30 func (MyT) foo() {
     31 }
     32 
     33 var issue12664_2 MyT = 0
     34 
     35 func TestRaceIssue12664_2(t *testing.T) {
     36 	c := make(chan struct{})
     37 	go func() {
     38 		issue12664_2 = 1
     39 		close(c)
     40 	}()
     41 	func(x MyI) {
     42 		// Never true, but prevents inlining.
     43 		if x.(MyT) == -1 {
     44 			close(c)
     45 		}
     46 	}(issue12664_2)
     47 	<-c
     48 }
     49 
     50 var issue12664_3 MyT = 0
     51 
     52 func TestRaceIssue12664_3(t *testing.T) {
     53 	c := make(chan struct{})
     54 	go func() {
     55 		issue12664_3 = 1
     56 		close(c)
     57 	}()
     58 	var r MyT
     59 	var i interface{} = r
     60 	issue12664_3 = i.(MyT)
     61 	<-c
     62 }
     63 
     64 var issue12664_4 MyT = 0
     65 
     66 func TestRaceIssue12664_4(t *testing.T) {
     67 	c := make(chan struct{})
     68 	go func() {
     69 		issue12664_4 = 1
     70 		close(c)
     71 	}()
     72 	var r MyT
     73 	var i MyI = r
     74 	issue12664_4 = i.(MyT)
     75 	<-c
     76 }
     77