Fix #9190: add test

Author: liufengyun

tests/patmat/i9190.scala

@@ -0,0 +1,23 @@
+class Test {
+  case object X; type X = X.type
+  case object Y; type Y = Y.type
+
+  type XorY = X | Y
+
+  val testee1: XorY = X
+  testee1 match {
+    case value: XorY => println(value)
+  }
+
+  val testee2: Tuple1[XorY] = Tuple1(X)
+  testee2 match {
+    case Tuple1(value: XorY) => println(value)
+  }
+
+  type IntOrString = Int | String
+
+  val testee3: Tuple1[IntOrString] = Tuple1(42)
+  testee3 match {
+    case Tuple1(value: IntOrString) => println(value)
+  }
+}