library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:20:5: Error: Property 'length' cannot be accessed on 'String?' because it is potentially null.
// Try accessing using ?. instead.
//   s.length;
//     ^^^^^^
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:21:5: Error: Method 'substring' cannot be called on 'String?' because it is potentially null.
// Try calling using ?. instead.
//   s.substring(1, 1);
//     ^^^^^^^^^
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:23:5: Error: Method 'foo' cannot be called on 'A?' because it is potentially null.
//  - 'A' is from 'pkg/front_end/testcases/nnbd/nullable_receiver.dart'.
// Try calling using ?. instead.
//   a.foo();
//     ^^^
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:24:5: Error: Property 'bar' cannot be accessed on 'A?' because it is potentially null.
//  - 'A' is from 'pkg/front_end/testcases/nnbd/nullable_receiver.dart'.
// Try accessing using ?. instead.
//   a.bar;
//     ^^^
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:25:5: Error: Property 'baz' cannot be accessed on 'A?' because it is potentially null.
//  - 'A' is from 'pkg/front_end/testcases/nnbd/nullable_receiver.dart'.
// Try accessing using ?. instead.
//   a.baz = 42;
//     ^^^
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:26:4: Error: Can't use an expression of type 'A?' as a function because it's potentially null.
//  - 'A' is from 'pkg/front_end/testcases/nnbd/nullable_receiver.dart'.
// Try calling using ?.call instead.
//   a();
//    ^
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:27:13: Error: Too many positional arguments: 0 allowed, but 1 found.
// Try removing the extra positional arguments.
//   b.toString(0);
//             ^
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:29:17: Error: Can't tear off method 'call' from a potentially null value.
//   Function f1 = a;
//                 ^
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:30:24: Error: Can't tear off method 'call' from a potentially null value.
//   void Function() f2 = a;
//                        ^
//
// pkg/front_end/testcases/nnbd/nullable_receiver.dart:31:25: Error: Can't tear off method 'call' from a potentially null value.
//   void Function()? f3 = a;
//                         ^
//
import self as self;
import "dart:core" as core;

class A extends core::Object {
  synthetic constructor •() → self::A
    : super core::Object::•()
    ;
  method foo() → dynamic {}
  get bar() → core::int
    return 42;
  set baz(core::int value) → void {}
  method call() → void {}
}
class B extends core::Object {
  synthetic constructor •() → self::B
    : super core::Object::•()
    ;
  method toString([core::int extra = #C1]) → core::String
    return super.{core::Object::toString}();
}
static method error(core::String? s, self::A? a, self::B? b) → dynamic {
  invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:20:5: Error: Property 'length' cannot be accessed on 'String?' because it is potentially null.
Try accessing using ?. instead.
  s.length;
    ^^^^^^" in s.{core::String::length}{<nullable>}.{core::int};
  invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:21:5: Error: Method 'substring' cannot be called on 'String?' because it is potentially null.
Try calling using ?. instead.
  s.substring(1, 1);
    ^^^^^^^^^" in s.{core::String::substring}{<nullable>}.(1, 1){(core::int, [core::int?]) → core::String};
  invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:23:5: Error: Method 'foo' cannot be called on 'A?' because it is potentially null.
 - 'A' is from 'pkg/front_end/testcases/nnbd/nullable_receiver.dart'.
Try calling using ?. instead.
  a.foo();
    ^^^" in a.{self::A::foo}{<nullable>}.(){() → dynamic};
  invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:24:5: Error: Property 'bar' cannot be accessed on 'A?' because it is potentially null.
 - 'A' is from 'pkg/front_end/testcases/nnbd/nullable_receiver.dart'.
Try accessing using ?. instead.
  a.bar;
    ^^^" in a.{self::A::bar}{<nullable>}.{core::int};
  invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:25:5: Error: Property 'baz' cannot be accessed on 'A?' because it is potentially null.
 - 'A' is from 'pkg/front_end/testcases/nnbd/nullable_receiver.dart'.
Try accessing using ?. instead.
  a.baz = 42;
    ^^^" in a.{self::A::baz}{<nullable>}. = 42;
  invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:26:4: Error: Can't use an expression of type 'A?' as a function because it's potentially null.
 - 'A' is from 'pkg/front_end/testcases/nnbd/nullable_receiver.dart'.
Try calling using ?.call instead.
  a();
   ^" in a.{self::A::call}{<nullable>}.(){() → void};
  invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:27:13: Error: Too many positional arguments: 0 allowed, but 1 found.
Try removing the extra positional arguments.
  b.toString(0);
            ^" in b.{core::Object::toString}{<inapplicable>}.(0){(invalid-type) → invalid-type};
  core::Function f1 = invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:29:17: Error: Can't tear off method 'call' from a potentially null value.
  Function f1 = a;
                ^" in a as{TypeError} core::Function;
  () → void f2 = invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:30:24: Error: Can't tear off method 'call' from a potentially null value.
  void Function() f2 = a;
                       ^" in a as{TypeError} () → void;
  () →? void f3 = invalid-expression "pkg/front_end/testcases/nnbd/nullable_receiver.dart:31:25: Error: Can't tear off method 'call' from a potentially null value.
  void Function()? f3 = a;
                        ^" in a as{TypeError} () →? void;
}
static method ok<T extends core::Object?>(core::String? s, self::A? a, self::ok::T% t, self::B? b, core::Invocation i) → dynamic {
  s =={core::String::==}{(core::Object) → core::bool} s;
  a =={core::Object::==}{(core::Object) → core::bool} a;
  t =={core::Object::==}{(core::Object) → core::bool} t;
  b =={core::Object::==}{(core::Object) → core::bool} b;
  s.{core::Object::hashCode}{core::int};
  a.{core::Object::hashCode}{core::int};
  t.{core::Object::hashCode}{core::int};
  b.{core::Object::hashCode}{core::int};
  s.{core::Object::toString}(){() → core::String};
  a.{core::Object::toString}(){() → core::String};
  t.{core::Object::toString}(){() → core::String};
  b.{core::Object::toString}(){() → core::String};
  try {
    s.{core::Object::noSuchMethod}(i){(core::Invocation) → dynamic};
  }
  on core::Object catch(final core::Object e, final core::StackTrace t) {
  }
  try {
    a.{core::Object::noSuchMethod}(i){(core::Invocation) → dynamic};
  }
  on core::Object catch(final core::Object e, final core::StackTrace t) {
  }
  try {
    t.{core::Object::noSuchMethod}(i){(core::Invocation) → dynamic};
  }
  on core::Object catch(final core::Object e, final core::StackTrace t) {
  }
  try {
    b.{core::Object::noSuchMethod}(i){(core::Invocation) → dynamic};
  }
  on core::Object catch(final core::Object e, final core::StackTrace t) {
  }
  s.{core::Object::runtimeType}{core::Type};
  a.{core::Object::runtimeType}{core::Type};
  t.{core::Object::runtimeType}{core::Type};
  b.{core::Object::runtimeType}{core::Type};
}
static method main() → dynamic {}

constants  {
  #C1 = 42
}