Missing unreachable case warning

[Sporarum]

Compiler version

3.3.0 / 3.3.1-RC1

Minimized code

object O2:
  sealed trait A
  case class B() extends A
  
  
  def bigMatch(x: A) = x match
  	case B() =>
  	case _ => // no warning

Expectation

The line case _ => should have the same warning as other configurations:
Unreachable case except for null (if this is intentional, consider writing case null => instead).

The above as well as working examples can be found at:
https://scastie.scala-lang.org/ZS2DRtbBQSODAVpTotH45w

[som-snytt]

Reminiscent of a recent Scala 2 ticket where the number of cases made a difference in messaging.

[scala-center-bot]

This issue was picked for the Issue Spree No. 34 of 01 August 2023 which takes place in 7 days. @dwijnand, @XLPI, antognini will be working on it. If you have any insight into the issue or guidance on how to fix it, please leave it here.