Use ordered pattern match to distinguish Array[BoxedUnit]

Author: retronym

library/src/scala/Array.scala

@@ -122,9 +122,8 @@ object Array {
     * @see `java.util.Arrays#copyOf`
     */
   def copyOf[A](original: Array[A], newLength: Int): Array[A] = (original match {
-    case x: Array[AnyRef]     =>
-      if (x.getClass.getComponentType == classOf[BoxedUnit]) newUnitArray(newLength).asInstanceOf[Array[A]]
-      else java.util.Arrays.copyOf(x, newLength)
+    case x: Array[BoxedUnit]  => newUnitArray(newLength).asInstanceOf[Array[A]]
+    case x: Array[AnyRef]     => java.util.Arrays.copyOf(x, newLength)
     case x: Array[Int]        => java.util.Arrays.copyOf(x, newLength)
     case x: Array[Double]     => java.util.Arrays.copyOf(x, newLength)
     case x: Array[Long]       => java.util.Arrays.copyOf(x, newLength)