Nil.min throws UnsupportedOperationException instead of NoSuchElementException

Author: xirc

core/src/main/scala/scala/collection/parallel/ParIterableLike.scala

@@ -465,6 +465,8 @@ extends IterableOnce[T @uncheckedVariance]
   }
 
   def min[U >: T](implicit ord: Ordering[U]): T = {
+    if (isEmpty) throw new UnsupportedOperationException("empty.min")
+
     tasksupport.executeAndWaitResult(new Min(ord, splitter)).get.asInstanceOf[T]
   }
 

junit/src/test/scala/scala/collection/parallel/mutable/ParArrayTest.scala

@@ -132,4 +132,10 @@ class ParArrayTest extends scala.collection.concurrent.ctries_old.Spec {
   def `simple map test`: Unit = {
     assert(ParArray(1,2,3,4,5).map( (_:Int) * 10 ) == ParArray(10,20,30,40,50))
   }
+
+  @Test
+  def `empty min`: Unit = {
+    evaluating { ParArray.empty[Int].min }.shouldProduce[UnsupportedOperationException]()
+  }
+
 }