| library; | 
 | // | 
 | // Problems in library: | 
 | // | 
 | // pkg/front_end/testcases/general/issue52872.dart:18:10: Error: Required named parameter 'v2' must be provided. | 
 | //   C c = C(true); | 
 | //          ^ | 
 | // pkg/front_end/testcases/general/issue52872.dart:15:7: Context: The class 'C' has a constructor that takes no arguments. | 
 | // class C = A with M1; | 
 | //       ^ | 
 | // | 
 | import self as self; | 
 | import "dart:core" as core; | 
 |  | 
 | class A extends core::Object { | 
 |   field core::bool v1; | 
 |   field core::num v2; | 
 |   constructor •(core::bool v1, {required core::num v2}) → self::A | 
 |     : self::A::v1 = v1, self::A::v2 = v2, super core::Object::•() | 
 |     ; | 
 | } | 
 | mixin class M1 extends core::Object { | 
 |   field core::num v2 = 1.{core::int::unary-}(){() → core::int}; | 
 |   synthetic constructor •() → self::M1 | 
 |     : super core::Object::•() | 
 |     ; | 
 | } | 
 | class C = self::A with self::M1 { | 
 |   synthetic constructor •(core::bool v1, {required core::num v2}) → self::C | 
 |     : super self::A::•(v1, v2: v2) | 
 |     ; | 
 |   mixin-super-stub get v2() → core::num | 
 |     return super.{self::M1::v2}; | 
 |   mixin-super-stub set v2(core::num value) → void | 
 |     return super.{self::M1::v2} = value; | 
 | } | 
 | static method test() → dynamic { | 
 |   self::C c = invalid-expression "pkg/front_end/testcases/general/issue52872.dart:18:10: Error: Required named parameter 'v2' must be provided. | 
 |   C c = C(true); | 
 |          ^"; | 
 | } |