java.util.NoSuchElementException: head of empty list

eed3si9n.com | 8 months ago
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    java.util.NoSuchElementException: head of empty list
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    Root Cause Analysis

    1. java.util.NoSuchElementException

      head of empty list

      at scala.collection.immutable.Nil$.head()
    2. Scala
      Stack.pop
      1. scala.collection.immutable.Nil$.head(List.scala:318)
      2. scala.collection.immutable.Nil$.head(List.scala:315)
      3. scala.collection.mutable.Stack.pop(Stack.scala:140)
      3 frames
    3. Unknown
      Macros$$anonfun$1.apply
      1. Macros$$anonfun$1.apply(Macros.scala:49)
      2. Macros$$anonfun$1.apply(Macros.scala:47)
      2 frames
    4. Scala
      ArrayOps.map
      1. scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:237)
      2. scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:237)
      3. scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:34)
      4. scala.collection.mutable.ArrayOps.foreach(ArrayOps.scala:39)
      5. scala.collection.TraversableLike$class.map(TraversableLike.scala:237)
      6. scala.collection.mutable.ArrayOps.map(ArrayOps.scala:39)
      6 frames
    5. Unknown
      Macros$.printf_impl
      1. Macros$.printf_impl(Macros.scala:47)
      1 frame