java.lang.UnsupportedOperationException: empty.reduceLeft

GitHub | nafg | 11 months ago
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    Root Cause Analysis

    1. java.lang.UnsupportedOperationException

      empty.reduceLeft

      at scala.collection.TraversableOnce$class.reduceLeft()
    2. Scala
      AbstractTraversable.reduce
      1. scala.collection.TraversableOnce$class.reduceLeft(TraversableOnce.scala:180)
      2. scala.collection.mutable.ArrayBuffer.scala$collection$IndexedSeqOptimized$$super$reduceLeft(ArrayBuffer.scala:48)
      3. scala.collection.IndexedSeqOptimized$class.reduceLeft(IndexedSeqOptimized.scala:74)
      4. scala.collection.mutable.ArrayBuffer.reduceLeft(ArrayBuffer.scala:48)
      5. scala.collection.TraversableOnce$class.reduce(TraversableOnce.scala:208)
      6. scala.collection.AbstractTraversable.reduce(Traversable.scala:104)
      6 frames
    3. upickle
      Macros$Reading.mergeTrait
      1. upickle.Macros$Reading.mergeTrait(Macros.scala:77)
      1 frame
    4. derive
      Derive$$anonfun$9.apply
      1. derive.Derive.deriveTrait(Derive.scala:298)
      2. derive.Derive$$anonfun$9.apply(Derive.scala:237)
      3. derive.Derive$$anonfun$9.apply(Derive.scala:235)
      3 frames
    5. Scala
      AbstractTraversable.map
      1. scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
      2. scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
      3. scala.collection.immutable.Map$Map2.foreach(Map.scala:137)
      4. scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
      5. scala.collection.AbstractTraversable.map(Traversable.scala:104)
      5 frames
    6. derive
      Derive.derive
      1. derive.Derive.deriveType(Derive.scala:235)
      2. derive.Derive.derive(Derive.scala:60)
      2 frames
    7. upickle
      Macros$.macroRImpl
      1. upickle.Macros$.macroRImpl(Macros.scala:145)
      1 frame