.

go/internal/xtracing/tracetest/tracetest.go

@@ -210,7 +210,7 @@ func (m *Msg) nak(why string) {
 func NewChan(name string) Chan {
 	// XXX somehow avoid channels with duplicate names
 	//     (only allow to create named channels from under dispatcher?)
-	return &_chan{msgq: make(chan *Msg), _name: name}
+	return &_chan{msgq: make(chan *Msg), down: make(chan struct{}), _name: name}
 }