deprecating types after colon

compiler/testData/diagnostics/tests/cast/bare/AsNullableNotEnough.kt

@@ -1,8 +1,10 @@
+// !CHECK_TYPE
+
 trait Tr
 trait G<T>
 
 fun test(tr: Tr) {
     val v = tr as <!NO_TYPE_ARGUMENTS_ON_RHS!>G?<!>
     // If v is not nullable, there will be a warning on this line:
-    v!!: G<*>
+    checkSubtype<G<*>>(v!!)
 }