| library; | 
 | // | 
 | // Problems in library: | 
 | // | 
 | // pkg/front_end/testcases/general/issue39666.dart:6:8: Error: Error when reading 'pkg/front_end/testcases/general/issue39666_lib.dart': <os-message> | 
 | // import 'issue39666_lib.dart'; | 
 | //        ^ | 
 | // | 
 | import self as self; | 
 | import "dart:core" as core; | 
 |  | 
 | import "dart:async"; | 
 | import "org-dartlang-testcase:///issue39666_lib.dart"; | 
 |  | 
 | class A<X extends FutureOr<core::List<dynamic>>> extends core::Object { | 
 |   synthetic constructor •() → self::A<self::A::X> | 
 |     ; | 
 | } | 
 | static method main() → void | 
 |   ; | 
 |  | 
 | library; | 
 | import self as self2; |