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  1. ,

    In Scala, don’t use the get method with Option to access a result. Use getOrElse, a match expression, or foreach instead.

java.util.NoSuchElementException: None.get	at scala.None$.get(Option.scala:347)	at scala.None$.get(Option.scala:345)	at chisel3.internal.HasId$class.getRef(Builder.scala:108)	at chisel3.core.Data.getRef(Data.scala:30)	at chisel3.internal.firrtl.Node.fullName(IR.scala:53)	at chisel3.internal.firrtl.Emitter.chisel3$internal$firrtl$Emitter$$emit(Emitter.scala:26)