fix VectorMap#init and VectorMap#tail

SethTisue · SethTisue · commit cfb3472069f9 · 2018-08-22T15:31:57.000-07:00
fixes part of scala/bug#11100
diff --git a/src/library/scala/collection/immutable/VectorMap.scala b/src/library/scala/collection/immutable/VectorMap.scala
@@ -95,11 +95,11 @@ final class VectorMap[K, +V] private[immutable] (
   }
 
   override def tail: VectorMap[K, V] = {
-    new VectorMap(fields.tail, underlying.remove(fields.last))
+    new VectorMap(fields.tail, underlying.remove(fields.head))
   }
 
   override def init: VectorMap[K, V] = {
-    new VectorMap(fields.init, underlying.remove(fields.head))
+    new VectorMap(fields.init, underlying.remove(fields.last))
   }
 
   // Only care about content, not ordering for equality

Original file line number	Diff line number	Diff line change
`@@ -95,11 +95,11 @@ final class VectorMap[K, +V] private[immutable] (`
`95`	`95`	`}`
`96`	`96`
`97`	`97`	`override def tail: VectorMap[K, V] = {`
`98`		`- new VectorMap(fields.tail, underlying.remove(fields.last))`
	`98`	`+ new VectorMap(fields.tail, underlying.remove(fields.head))`
`99`	`99`	`}`
`100`	`100`
`101`	`101`	`override def init: VectorMap[K, V] = {`
`102`		`- new VectorMap(fields.init, underlying.remove(fields.head))`
	`102`	`+ new VectorMap(fields.init, underlying.remove(fields.last))`
`103`	`103`	`}`
`104`	`104`
`105`	`105`	`// Only care about content, not ordering for equality`