add neg test for issue scala#18448

soronpo · soronpo · commit a8d68b6f3bb2 · 2023-08-25T12:56:09.000-07:00
diff --git a/tests/neg/i18448/UBMatch_1.scala b/tests/neg/i18448/UBMatch_1.scala
@@ -0,0 +1,2 @@
+type <:![T <: UB, UB] <: UB = T match
+  case UB => T
diff --git a/tests/neg/i18448/UBMatch_2.scala b/tests/neg/i18448/UBMatch_2.scala
@@ -0,0 +1,3 @@
+trait Foo
+type Of[T] <: Foo = T match
+  case Foo => T <:! Foo
