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

typedef F<contravariant T extends core::Object? = dynamic> = (T%) → void;
class B<T extends core::Object? = dynamic, U extends (self::B::T%) → void = (Never) → void> extends core::Object {
  synthetic constructor •() → self::B<self::B::T%, self::B::U>
    : super core::Object::•()
    ;
  operator +(dynamic other) → self::B<self::B::T%, (self::B::T%) → void>
    return throw "";
}
class C extends core::Object {
  field self::B<core::num, (core::num) → void> x = throw "";
  static field self::B<core::num, (core::num) → void> y = throw "";
  synthetic constructor •() → self::C
    : super core::Object::•()
    ;
  operator [](core::int i) → self::B<core::num, (core::num) → void>
    return throw "";
  operator []=(core::int i, self::B<core::num, (core::num) → void> v) → void {}
}
static method test1(self::B<core::num, (core::num) → void> b) → void {
  b = b.{self::B::+}(1){(dynamic) → self::B<core::num, (core::num) → void>} as{TypeError,CovarianceCheck,ForNonNullableByDefault} self::B<core::num, (core::num) → void>;
  self::B<core::num, (core::num) → void> x = b = b.{self::B::+}(2){(dynamic) → self::B<core::num, (core::num) → void>} as{TypeError,CovarianceCheck,ForNonNullableByDefault} self::B<core::num, (core::num) → void>;
}
static method test2(self::C c) → void {
  let final self::C #t1 = c in let final core::int #t2 = 0 in #t1.{self::C::[]=}(#t2, #t1.{self::C::[]}(#t2){(core::int) → self::B<core::num, (core::num) → void>}.{self::B::+}(1){(dynamic) → self::B<core::num, (core::num) → void>} as{TypeError,CovarianceCheck,ForNonNullableByDefault} self::B<core::num, (core::num) → void>){(core::int, self::B<core::num, (core::num) → void>) → void};
  self::B<core::num, (core::num) → void> x = let final self::C #t3 = c in let final core::int #t4 = 0 in let final self::B<core::num, (core::num) → void> #t5 = #t3.{self::C::[]}(#t4){(core::int) → self::B<core::num, (core::num) → void>}.{self::B::+}(2){(dynamic) → self::B<core::num, (core::num) → void>} as{TypeError,CovarianceCheck,ForNonNullableByDefault} self::B<core::num, (core::num) → void> in let final void #t6 = #t3.{self::C::[]=}(#t4, #t5){(core::int, self::B<core::num, (core::num) → void>) → void} in #t5;
}
static method test3(self::C c) → void {
  let final self::C #t7 = c in #t7.{self::C::x} = #t7.{self::C::x}{self::B<core::num, (core::num) → void>}.{self::B::+}(1){(dynamic) → self::B<core::num, (core::num) → void>} as{TypeError,CovarianceCheck,ForNonNullableByDefault} self::B<core::num, (core::num) → void>;
  self::B<core::num, (core::num) → void> x = let final self::C #t8 = c in #t8.{self::C::x} = #t8.{self::C::x}{self::B<core::num, (core::num) → void>}.{self::B::+}(2){(dynamic) → self::B<core::num, (core::num) → void>} as{TypeError,CovarianceCheck,ForNonNullableByDefault} self::B<core::num, (core::num) → void>;
}
static method test4(self::C c) → void {
  self::C::y = self::C::y.{self::B::+}(1){(dynamic) → self::B<core::num, (core::num) → void>} as{TypeError,CovarianceCheck,ForNonNullableByDefault} self::B<core::num, (core::num) → void>;
  self::B<core::num, (core::num) → void> x = self::C::y = self::C::y.{self::B::+}(2){(dynamic) → self::B<core::num, (core::num) → void>} as{TypeError,CovarianceCheck,ForNonNullableByDefault} self::B<core::num, (core::num) → void>;
}
static method main() → void {}


Extra constant evaluation status:
Evaluated: VariableGet @ org-dartlang-testcase:///contravariant_combiner.dart:27:5 -> IntConstant(0)
Evaluated: VariableGet @ org-dartlang-testcase:///contravariant_combiner.dart:27:5 -> IntConstant(0)
Evaluated: VariableGet @ org-dartlang-testcase:///contravariant_combiner.dart:28:13 -> IntConstant(0)
Evaluated: VariableGet @ org-dartlang-testcase:///contravariant_combiner.dart:28:13 -> IntConstant(0)
Extra constant evaluation: evaluated: 62, effectively constant: 4