|  | library /*isNonNullableByDefault*/; | 
|  | // | 
|  | // Problems in library: | 
|  | // | 
|  | // pkg/front_end/testcases/general/invalid_super_initializer.dart:8:8: Error: Can't use 'super' as an expression. | 
|  | // To delegate a constructor to a super constructor, put the super call as an initializer. | 
|  | //   B(): super()?.foo() {} | 
|  | //        ^ | 
|  | // | 
|  | // pkg/front_end/testcases/general/invalid_super_initializer.dart:8:8: Error: Expected an initializer. | 
|  | //   B(): super()?.foo() {} | 
|  | //        ^ | 
|  | // | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | abstract class A extends core::Object { | 
|  | synthetic constructor •() → self::A | 
|  | : super core::Object::•() | 
|  | ; | 
|  | } | 
|  | class B extends self::A { | 
|  | constructor •() → self::B | 
|  | : final dynamic #t1 = let final invalid-type #t2 = invalid-expression "pkg/front_end/testcases/general/invalid_super_initializer.dart:8:8: Error: Can't use 'super' as an expression. | 
|  | To delegate a constructor to a super constructor, put the super call as an initializer. | 
|  | B(): super()?.foo() {} | 
|  | ^" in #t2 == null ?{dynamic} null : #t2{dynamic}.foo() {} | 
|  | } | 
|  | static method bad() → dynamic { | 
|  | new self::B::•(); | 
|  | } | 
|  | static method main() → dynamic {} |