Fixes scala/bug#11059. Replcaed UnsupportedOperationException with NoSuchElementException

mrveera · mrveera · commit 8a7da0dd0c0e · 2018-08-09T01:38:56.000+05:30
diff --git a/library/src/scala/collection/immutable/Vector.scala b/library/src/scala/collection/immutable/Vector.scala
@@ -144,7 +144,7 @@ final class Vector[+A] private[immutable] (private[collection] val startIndex: I
   }
 
   override def head: A = {
-    if (isEmpty) throw new UnsupportedOperationException("empty.head")
+    if (isEmpty) throw new NoSuchElementException("empty.head")
     apply(0)
   }
 

Original file line number	Diff line number	Diff line change
`@@ -144,7 +144,7 @@ final class Vector[+A] private[immutable] (private[collection] val startIndex: I`
`144`	`144`	`}`
`145`	`145`
`146`	`146`	`override def head: A = {`
`147`		`- if (isEmpty) throw new UnsupportedOperationException("empty.head")`
	`147`	`+ if (isEmpty) throw new NoSuchElementException("empty.head")`
`148`	`148`	`apply(0)`
`149`	`149`	`}`
`150`	`150`