const runtime.waitReasonChanSendNilChan

4 uses

	runtime (current package)
		chan.go#L181: 		gopark(nil, nil, waitReasonChanSendNilChan, traceBlockForever, 2)
		runtime2.go#L1048: 	waitReasonChanSendNilChan                         // "chan send (nil chan)"
		runtime2.go#L1095: 	waitReasonChanSendNilChan:       "chan send (nil chan)",
		runtime2.go#L1180: 	waitReasonChanSendNilChan:     true,