java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at undefined.someFunc$$anonfun$go$1.apply$mcII$sp(someFunc.scala:7)
at undefined.someFunc$$anonfun$go$1.apply(someFunc.scala:6)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
at scala.collection.Iterator$$anon$10.next(Iterator.scala:312)
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:48)

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