Remove mu Lock from WaitTimeOut

token.go

@@ -64,9 +64,6 @@ func (b *baseToken) Wait() bool {
 // returns false if the timeout occurred. In the case of a timeout the Token
 // does not have an error set in case the caller wishes to wait again
 func (b *baseToken) WaitTimeout(d time.Duration) bool {
-	b.m.Lock()
-	defer b.m.Unlock()
-
 	timer := time.NewTimer(d)
 	select {
 	case <-b.complete:

token_test.go

@@ -1,6 +1,7 @@
 package mqtt
 
 import (
+	"errors"
 	"testing"
 	"time"
 )
@@ -11,4 +12,15 @@ func TestWaitTimeout(t *testing.T) {
 	if b.WaitTimeout(time.Second) {
 		t.Fatal("Should have failed")
 	}
+
+	// Now lets confirm that WaitTimeout returns
+	// setError() grabs the mutex which previously caused issues
+	// when there is a result (it returns true in this case)
+	b = baseToken{complete: make(chan struct{})}
+	go func(bt *baseToken) {
+		bt.setError(errors.New("test error"))
+	}(&b)
+	if !b.WaitTimeout(5 * time.Second) {
+		t.Fatal("Should have succeeded")
+	}
 }