library test;
import self as self;
import "dart:core" as core;

typedef F<T extends core::Object = dynamic> = (T) → void;
class B<T extends core::Object = dynamic> extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  operator +(generic-covariant-impl self::B<self::B::T> other) → self::B<self::B::T>
    return null;
}
class C<T extends core::Object = dynamic> extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  get x() → self::B<(self::C::T) → void>
    return null;
  set x(self::B<(self::C::T) → void> value) → void {}
}
static method test(self::C<core::num> c) → void {
  let final self::C<core::num> #t1 = c in #t1.{self::C::x} = (#t1.{self::C::x} as{TypeError} self::B<(core::num) → void>).{self::B::+}(let dynamic _ = null in let final dynamic #t2 = let dynamic _ = null in invalid-expression "pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart:20:49: Error: A value of type 'test::B<dart.core::num>' can't be assigned to a variable of type 'test::B<(dart.core::num) \u8594 void>'.
Try changing the type of the left hand side, or casting the right hand side to 'test::B<(dart.core::num) \u8594 void>'.
  c. /*@checkReturn=B<(num) -> void>*/ x += new B<num>();
                                                ^" in let final dynamic #t3 = new self::B::•<core::num>() in null);
  self::B<(core::num) → void> y = let final self::C<core::num> #t4 = c in #t4.{self::C::x} = (#t4.{self::C::x} as{TypeError} self::B<(core::num) → void>).{self::B::+}(let dynamic _ = null in let final dynamic #t5 = let dynamic _ = null in invalid-expression "pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart:21:57: Error: A value of type 'test::B<dart.core::num>' can't be assigned to a variable of type 'test::B<(dart.core::num) \u8594 void>'.
Try changing the type of the left hand side, or casting the right hand side to 'test::B<(dart.core::num) \u8594 void>'.
  var y = c. /*@checkReturn=B<(num) -> void>*/ x += new B<num>();
                                                        ^" in let final dynamic #t6 = new self::B::•<core::num>() in null);
  let final self::C<core::num> #t7 = c in (#t7.{self::C::x} as{TypeError} self::B<(core::num) → void>).{core::Object::==}(null) ?{self::B<core::Object>} #t7.{self::C::x} = let dynamic _ = null in let final dynamic #t8 = let dynamic _ = null in invalid-expression "pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart:22:50: Error: A value of type 'test::B<dart.core::num>' can't be assigned to a variable of type 'test::B<(dart.core::num) \u8594 void>'.
Try changing the type of the left hand side, or casting the right hand side to 'test::B<(dart.core::num) \u8594 void>'.
  c. /*@checkReturn=B<(num) -> void>*/ x ??= new B<num>();
                                                 ^" in let final dynamic #t9 = new self::B::•<core::num>() in null : null;
  self::B<core::Object> z = let final self::C<core::num> #t10 = c in let final dynamic #t11 = #t10.{self::C::x} as{TypeError} self::B<(core::num) → void> in #t11.{core::Object::==}(null) ?{self::B<core::Object>} #t10.{self::C::x} = let dynamic _ = null in let final dynamic #t12 = let dynamic _ = null in invalid-expression "pkg/front_end/testcases/runtime_checks_new/contravariant_getter_return_compound_assign.dart:23:58: Error: A value of type 'test::B<dart.core::num>' can't be assigned to a variable of type 'test::B<(dart.core::num) \u8594 void>'.
Try changing the type of the left hand side, or casting the right hand side to 'test::B<(dart.core::num) \u8594 void>'.
  var z = c. /*@checkReturn=B<(num) -> void>*/ x ??= new B<num>();
                                                         ^" in let final dynamic #t13 = new self::B::•<core::num>() in null : #t11;
}
static method main() → dynamic {}