Track sun.misc.Unsafe in LazyVal implementation

Author: natsukagami

library/src/scala/runtime/LazyVals.scala

@@ -10,7 +10,7 @@ import scala.annotation.*
  */
 object LazyVals {
   @nowarn
-  private val unsafe: sun.misc.Unsafe = {
+  private val unsafe: sun.misc.Unsafe^ = { // do not let unsafe leak
     def throwInitializationException() =
       throw new ExceptionInInitializerError(
         new IllegalStateException("Can't find instance of sun.misc.Unsafe")