const runtime.waitReasonChanSendNilChan

5 uses

	runtime (current package)
		chan.go#L181: 		gopark(nil, nil, waitReasonChanSendNilChan, traceBlockForever, 2)
		mgc.go#L1171: 		waitReasonChanSendNilChan,
		runtime2.go#L1240: 	waitReasonChanSendNilChan                         // "chan send (nil chan)"
		runtime2.go#L1278: 	waitReasonChanSendNilChan:       "chan send (nil chan)",
		runtime2.go#L1388: 	waitReasonChanSendNilChan:       true,