| library; | 
 | // | 
 | // Problems in library: | 
 | // | 
 | // pkg/front_end/testcases/super_parameters/opt_out.dart:14:5: Error: The 'super-parameters' language feature is disabled for this library. | 
 | // Try removing the `@dart=` annotation or setting the language version to 2.17 or higher. | 
 | //   B(super.field); | 
 | //     ^^^^^ | 
 | // pkg/front_end/testcases/super_parameters/opt_out.dart:5:1: Context: This is the annotation that opts out this library from the 'super-parameters' language feature. | 
 | // // @dart=2.15 | 
 | // ^^^^^^^^^^^^^ | 
 | // | 
 | // pkg/front_end/testcases/super_parameters/opt_out.dart:14:3: Error: The superclass, 'A', has no unnamed constructor that takes no arguments. | 
 | //   B(super.field); | 
 | //   ^ | 
 | // | 
 | import self as self; | 
 | import "dart:core" as core; | 
 |  | 
 | class A extends core::Object { | 
 |   field core::int field; | 
 |   constructor •(core::int field) → self::A | 
 |     : self::A::field = field, super core::Object::•() | 
 |     ; | 
 | } | 
 | class B extends self::A { | 
 |   constructor •(core::int field) → self::B | 
 |     : final dynamic #t1 = invalid-expression "pkg/front_end/testcases/super_parameters/opt_out.dart:14:3: Error: The superclass, 'A', has no unnamed constructor that takes no arguments. | 
 |   B(super.field); | 
 |   ^" | 
 |     ; | 
 | } | 
 | static method main() → dynamic {} |