library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/extensions/extension_field_with_type_parameter_usage.dart:6:5: Error: Extensions can't declare instance fields
// Try removing the field declaration or making it a static field
//   U field1 = null;
//     ^^^^^^
//
// pkg/front_end/testcases/extensions/extension_field_with_type_parameter_usage.dart:7:8: Error: Extensions can't declare instance fields
// Try removing the field declaration or making it a static field
//   int? field2 = () { U x = null; return null; }();
//        ^^^^^^
//
// pkg/front_end/testcases/extensions/extension_field_with_type_parameter_usage.dart:8:12: Error: Extensions can't declare instance fields
// Try removing the field declaration or making it a static field
//   List<U>? field3 = null;
//            ^^^^^^
//
// pkg/front_end/testcases/extensions/extension_field_with_type_parameter_usage.dart:9:18: Error: Extensions can't declare instance fields
// Try removing the field declaration or making it a static field
//   U Function(U)? field4 = null;
//                  ^^^^^^
//
// pkg/front_end/testcases/extensions/extension_field_with_type_parameter_usage.dart:10:30: Error: Extensions can't declare instance fields
// Try removing the field declaration or making it a static field
//   List<U> Function(List<U>)? field5 = null;
//                              ^^^^^^
//
// pkg/front_end/testcases/extensions/extension_field_with_type_parameter_usage.dart:11:8: Error: Extensions can't declare instance fields
// Try removing the field declaration or making it a static field
//   int? field6 = <E>() { E? x = null; return null; }<String>();
//        ^^^^^^
//
// pkg/front_end/testcases/extensions/extension_field_with_type_parameter_usage.dart:12:8: Error: Extensions can't declare instance fields
// Try removing the field declaration or making it a static field
//   int? field7 = <E>() { E? x = null; return null; }<U>();
//        ^^^^^^
//
// pkg/front_end/testcases/extensions/extension_field_with_type_parameter_usage.dart:13:8: Error: Extensions can't declare instance fields
// Try removing the field declaration or making it a static field
//   Type field8 = U;
//        ^^^^^^
//
import self as self;
import "dart:core" as core;

extension E<U extends core::Object? = dynamic> on core::String {
  field field1 = self::E|field1;
  field field2 = self::E|field2;
  field field3 = self::E|field3;
  field field4 = self::E|field4;
  field field5 = self::E|field5;
  field field6 = self::E|field6;
  field field7 = self::E|field7;
  field field8 = self::E|field8;
}
static field invalid-type E|field1;
static field core::int? E|field2;
static field core::List<invalid-type>? E|field3;
static field (invalid-type) →? invalid-type E|field4;
static field (core::List<invalid-type>) →? core::List<invalid-type> E|field5;
static field core::int? E|field6;
static field core::int? E|field7;
static field core::Type E|field8;
static method main() → dynamic
  ;