|  | library; | 
|  | // | 
|  | // Problems in library: | 
|  | // | 
|  | // pkg/front_end/testcases/general/issue49153.dart:9:42: Error: Duplicated named argument 'x'. | 
|  | // const a = {"a": A(x: 0, y: "", z: false, x: 1)}; | 
|  | //                                          ^ | 
|  | // | 
|  | import self as self; | 
|  | import "dart:core" as core; | 
|  |  | 
|  | class A<X extends core::num> extends core::Object /*hasConstConstructor*/  { | 
|  | const constructor •({core::int? x = #C1, core::String? y = #C1, core::bool? z = #C1}) → self::A<self::A::X> | 
|  | : super core::Object::•() | 
|  | ; | 
|  | } | 
|  | static const field core::Map<core::String, self::A<core::num>> a = invalid-expression "pkg/front_end/testcases/general/issue49153.dart:9:42: Error: Duplicated named argument 'x'. | 
|  | const a = {\"a\": A(x: 0, y: \"\", z: false, x: 1)}; | 
|  | ^"; | 
|  | static method main() → dynamic {} | 
|  |  | 
|  | constants  { | 
|  | #C1 = null | 
|  | } |