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packet.go

@@ -35,6 +35,9 @@ func ReadCartPacket(conn io.Reader, packet *CartPacket) error {
 }
 
 func GetPacketData(conn io.Reader, len uint64) ([]byte, error) {
+	if len == 0 {
+		return []byte{}, nil
+	}
 	data := make([]byte, len)
 	_, err := conn.Read(data)
 	return data, err