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via Stack Overflow by Alexander Samoilov
, 2 years ago
via grzegorzbalcerek.net by Unknown author, 1 year ago
head of empty list
via Google Groups by Channing Walton, 1 year ago
java.util.NoSuchElementException: head of empty list	at scala.collection.immutable.Nil$.head(List.scala:420)	at scala.collection.immutable.Nil$.head(List.scala:417)