With Scala 2.13.x, I am getting scala.MatchError: null when I use a placeholder for an unused variable:
scala> object Test {
| val _: Any = null
| }
object Test
scala> Test
scala.MatchError: null
... 41 elided
But with Scala 2.12.x, I am not getting scala.MatchError: null:
scala> object Test {
| val _: Any = null
| }
defined object Test
scala> Test
res1: Test.type = Test$@784c5ef5
Any reason?