java.lang.NullPointerException

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  • java.lang.NullPointerException at org.scalacheck.Gen$$anonfun$containerOf$2.apply(Gen.scala:415) at org.scalacheck.Gen$$anonfun$containerOf$2.apply(Gen.scala:414) at org.scalacheck.Gen$$anon$3.sieveCopy(Gen.scala:68) at org.scalacheck.Gen$$anonfun$oneOf$4$$anonfun$apply$11.apply(Gen.scala:356) at org.scalacheck.Gen$$anonfun$oneOf$4$$anonfun$apply$11.apply(Gen.scala:356) at scala.collection.IndexedSeqOptimized$$anonfun$exists$1.apply(IndexedSeqOptimized.scala:40) at scala.collection.IndexedSeqOptimized$$anonfun$exists$1.apply(IndexedSeqOptimized.scala:40) at scala.collection.IndexedSeqOptimized$class.segmentLength(IndexedSeqOptimized.scala:189) at scala.collection.mutable.ArrayBuffer.segmentLength(ArrayBuffer.scala:47) at scala.collection.GenSeqLike$class.prefixLength(GenSeqLike.scala:92) at scala.collection.AbstractSeq.prefixLength(Seq.scala:40) at scala.collection.IndexedSeqOptimized$class.exists(IndexedSeqOptimized.scala:40) at scala.collection.mutable.ArrayBuffer.exists(ArrayBuffer.scala:47) at org.scalacheck.Gen$$anonfun$oneOf$4.apply(Gen.scala:356) at org.scalacheck.Gen$$anonfun$oneOf$4.apply(Gen.scala:356) at org.scalacheck.Gen$R$$anon$4$$anonfun$sieve$2.apply(Gen.scala:149) at org.scalacheck.Gen$R$$anon$4$$anonfun$sieve$2.apply(Gen.scala:148) at scala.Option.filter(Option.scala:181) at org.scalacheck.Gen$R$class.retrieve(Gen.scala:140) at org.scalacheck.Gen$R$$anon$4.retrieve(Gen.scala:146) at org.scalacheck.Gen$class.sample(Gen.scala:80) at org.scalacheck.Gen$$anon$3.sample(Gen.scala:65)
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