library;
//
// Problems in library:
//
// pkg/front_end/testcases/general_nnbd_opt_out/issue39421.dart:11:7: Error: 'A' is already declared in this scope.
// class A {}
//       ^
// pkg/front_end/testcases/general_nnbd_opt_out/issue39421.dart:9:7: Context: Previous declaration of 'A'.
// class A {}
//       ^
//
// pkg/front_end/testcases/general_nnbd_opt_out/issue39421.dart:18:12: Error: 'A' isn't a type.
//   foo(List<A> a) {}
//            ^
// pkg/front_end/testcases/general_nnbd_opt_out/issue39421.dart:18:12: Context: This isn't a type.
//   foo(List<A> a) {}
//            ^
//
// pkg/front_end/testcases/general_nnbd_opt_out/issue39421.dart:18:12: Error: Can't use 'A' because it is declared more than once.
//   foo(List<A> a) {}
//            ^
//
import self as self;
import "dart:core" as core;

class A#1 extends core::Object {
  synthetic constructor •() → self::A#1*
    : super core::Object::•()
    ;
  abstract member-signature get _identityHashCode() → core::int*;
  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*;
  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*;
  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*;
  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*;
  abstract member-signature operator ==(dynamic other) → core::bool*;
  abstract member-signature get hashCode() → core::int*;
  abstract member-signature method toString() → core::String*;
  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic;
  abstract member-signature get runtimeType() → core::Type*;
}
class A extends core::Object {
  synthetic constructor •() → self::A*
    : super core::Object::•()
    ;
  abstract member-signature get _identityHashCode() → core::int*;
  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*;
  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*;
  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*;
  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*;
  abstract member-signature operator ==(dynamic other) → core::bool*;
  abstract member-signature get hashCode() → core::int*;
  abstract member-signature method toString() → core::String*;
  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic;
  abstract member-signature get runtimeType() → core::Type*;
}
class B extends core::Object {
  synthetic constructor •() → self::B*
    : super core::Object::•()
    ;
  method foo(core::List<core::Null?>* a) → dynamic {}
  abstract member-signature get _identityHashCode() → core::int*;
  abstract member-signature method _instanceOf(dynamic instantiatorTypeArguments, dynamic functionTypeArguments, dynamic type) → core::bool*;
  abstract member-signature method _simpleInstanceOf(dynamic type) → core::bool*;
  abstract member-signature method _simpleInstanceOfTrue(dynamic type) → core::bool*;
  abstract member-signature method _simpleInstanceOfFalse(dynamic type) → core::bool*;
  abstract member-signature operator ==(dynamic other) → core::bool*;
  abstract member-signature get hashCode() → core::int*;
  abstract member-signature method toString() → core::String*;
  abstract member-signature method noSuchMethod(core::Invocation* invocation) → dynamic;
  abstract member-signature get runtimeType() → core::Type*;
}
class C extends self::B {
  synthetic constructor •() → self::C*
    : super self::B::•()
    ;
  method foo(core::List<invalid-type>* a) → dynamic {}
}
static method main() → dynamic {}