Fixes #3378. Add an error for the analyzer in definition_t16.dart (#3379)

diff --git a/Language/Classes/definition_t16.dart b/Language/Classes/definition_t16.dart
index 2661660..da184de 100644
--- a/Language/Classes/definition_t16.dart
+++ b/Language/Classes/definition_t16.dart
@@ -27,6 +27,8 @@
 
 main() {
   A(42);
+//  ^^
+// [analyzer] unspecified
 }
 // [error line 33, column 0]
 // [cfe] unspecified