library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/value_class/value_extends_non_value_error.dart:8:7: Error: Field 'numberOfLegs' should be initialized because its type 'int' doesn't allow null.
//   int numberOfLegs;
//       ^^^^^^^^^^^^
//
// pkg/front_end/testcases/value_class/value_extends_non_value_error.dart:15:13: Error: Final field 'numberOfLegs' is not initialized.
// Try to initialize the field in the declaration or in every constructor.
//   final int numberOfLegs;
//             ^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
import "value_class_support_lib.dart" as val;

import "org-dartlang-testcase:///value_class_support_lib.dart";

class Animal extends core::Object {
  field core::int numberOfLegs = null;
  synthetic constructor •() → self::Animal
    : super core::Object::•()
    ;
}
class Cat extends self::Animal {
  synthetic constructor •() → self::Cat
    : super self::Animal::•()
    ;
  operator /*isLegacy*/ ==(core::Object other) → core::bool
    return other is self::Cat;
  get /*isLegacy*/ hashCode() → core::int
    return val::JenkinsSmiHash::finish("org-dartlang-testcase:///value_extends_non_value_error.dartCat".{core::String::hashCode});
  method /*isLegacy*/ toString() → core::String
    return "Cat()";
  method /*isLegacy*/ copyWith() → dynamic
    return new self::Cat::•();
}
class Animal2 extends core::Object {
  final field core::int numberOfLegs = null;
  synthetic constructor •() → self::Animal2
    : super core::Object::•()
    ;
}
class Cat2 extends self::Animal2 {
  synthetic constructor •() → self::Cat2
    : super self::Animal2::•()
    ;
  operator /*isLegacy*/ ==(core::Object other) → core::bool
    return other is self::Cat2;
  get /*isLegacy*/ hashCode() → core::int
    return val::JenkinsSmiHash::finish("org-dartlang-testcase:///value_extends_non_value_error.dartCat2".{core::String::hashCode});
  method /*isLegacy*/ toString() → core::String
    return "Cat2()";
  method /*isLegacy*/ copyWith() → dynamic
    return new self::Cat2::•();
}
static method main() → dynamic {}

library /*isNonNullableByDefault*/;
import self as val;
import "dart:core" as core;

class JenkinsSmiHash extends core::Object {
  synthetic constructor •() → val::JenkinsSmiHash
    : super core::Object::•()
    ;
  static method combine(core::int hash, core::int value) → core::int {
    hash = 536870911.{core::int::&}(hash.{core::num::+}(value));
    hash = 536870911.{core::int::&}(hash.{core::num::+}(524287.{core::int::&}(hash).{core::int::<<}(10)));
    return hash.{core::int::^}(hash.{core::int::>>}(6));
  }
  static method finish(core::int hash) → core::int {
    hash = 536870911.{core::int::&}(hash.{core::num::+}(67108863.{core::int::&}(hash).{core::int::<<}(3)));
    hash = hash.{core::int::^}(hash.{core::int::>>}(11));
    return 536870911.{core::int::&}(hash.{core::num::+}(16383.{core::int::&}(hash).{core::int::<<}(15)));
  }
}
static const field core::String valueClass = #C1;

constants  {
  #C1 = "valueClass"
}

Extra constant evaluation status:
Evaluated: StringConcatenation @ org-dartlang-testcase:///value_extends_non_value_error.dart:12:7 -> StringConstant("Cat()")
Evaluated: StringConcatenation @ org-dartlang-testcase:///value_extends_non_value_error.dart:19:7 -> StringConstant("Cat2()")
Extra constant evaluation: evaluated: 46, effectively constant: 2