Add new tests with fixed Unit return type

Author: noti0na1

tests/run/i24573.check

@@ -35,3 +35,9 @@
 62
 63
 64
+71
+72
+75
+76
+81
+82

tests/run/i24573.scala

@@ -58,6 +58,17 @@ trait SFIS extends F1[Int, String]:
 trait SFIU extends F1[Int, Unit]:
   def apply(t: Int): Unit
 
+trait F1U[-T]:
+  def apply(t: T): Unit
+
+trait SF2T[-T] extends F1U[T]:
+  def apply(t: T): Unit
+
+trait SF2I extends F1U[Int]:
+  def apply(t: Int): Unit
+
+trait SF2S extends F1U[String]:
+  def apply(t: String): Unit
 
 object Test:
   def main(args: Array[String]): Unit =
@@ -149,3 +160,19 @@ object Test:
     val sfIU: SFIU = (x: Int) => println(x) // expanded
     sfIU(64)
 
+    val f2ITU: F1U[Int] = (x: Int) => println(x) // closure
+    f2ITU(71)
+    val f2STU: F1U[String] = (x: String) => println(x) // closure
+    f2STU("72")
+
+    val sf2IT: SF2T[Int] = (x: Int) => println(x) // closure
+    sf2IT(75)
+    val sf2ST: SF2T[String] = (x: String) => println(x) // closure
+    sf2ST("76")
+
+    val sf2I: SF2I = (x: Int) => println(x) // expanded
+    sf2I(81)
+    val sf2S: SF2S = (x: String) => println(x) // closure
+    sf2S("82")
+
+end Test