library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd/return_null.dart:7:8: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
// String returnImplicit() /*error*/ {
//        ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:13:10: Error: The value 'null' can't be returned from a function with return type 'String' because 'String' is not nullable.
//   return null; // error
//          ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:19:12: Error: The value 'null' can't be returned from a function with return type 'String' because 'String' is not nullable.
//     return null; // error
//            ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:16:8: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
// String returnMixed(bool b) /*error*/ {
//        ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:27:15: Error: A non-null value must be returned since the return type 'int' doesn't allow null.
// FutureOr<int> returnAsync3() async {} // error
//               ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:54:6: Error: A non-null value must be returned since the return type 'Enum' doesn't allow null.
//  - 'Enum' is from 'pkg/front_end/testcases/nnbd/return_null.dart'.
// Enum caseReturn2(Enum e) /* error */ {
//      ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:63:3: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
//   String returnImplicit() /* error */ {
//   ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:69:12: Error: The value 'null' can't be returned from a function with return type 'String' because 'String' is not nullable.
//     return null; // error
//            ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:75:14: Error: The value 'null' can't be returned from a function with return type 'String' because 'String' is not nullable.
//       return null; // error
//              ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:72:3: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
//   String returnMixed(bool b) /* error */ {
//   ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:83:3: Error: A non-null value must be returned since the return type 'int' doesn't allow null.
//   FutureOr<int> returnAsync3() async {} // error
//   ^
//
// pkg/front_end/testcases/nnbd/return_null.dart:108:3: Error: A non-null value must be returned since the return type 'Enum' doesn't allow null.
//  - 'Enum' is from 'pkg/front_end/testcases/nnbd/return_null.dart'.
//   Enum caseReturn2(Enum e) /* error */ {
//   ^
//
import self as self;
import "dart:core" as core;
import "dart:async" as asy;
import "dart:_internal" as _in;

import "dart:async";

class Enum extends core::Object /*isEnum*/  {
  final field core::int index;
  final field core::String _name;
  static const field core::List<self::Enum> values = #C7;
  static const field self::Enum a = #C3;
  static const field self::Enum b = #C6;
  const constructor •(core::int index, core::String _name) → self::Enum
    : self::Enum::index = index, self::Enum::_name = _name, super core::Object::•()
    ;
  method toString() → core::String
    return this.{self::Enum::_name};
}
static method returnImplicit() → core::String {
  core::print("foo");
  return let final Never #t1 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:7:8: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
String returnImplicit() /*error*/ {
       ^" in null;
}
static method returnExplicit() → core::String {
  core::print("foo");
  return let final Never #t2 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:13:10: Error: The value 'null' can't be returned from a function with return type 'String' because 'String' is not nullable.
  return null; // error
         ^" in null as{TypeError,ForNonNullableByDefault} core::String;
}
static method returnMixed(core::bool b) → core::String {
  if(b) {
    core::print("foo");
    return let final Never #t3 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:19:12: Error: The value 'null' can't be returned from a function with return type 'String' because 'String' is not nullable.
    return null; // error
           ^" in null as{TypeError,ForNonNullableByDefault} core::String;
  }
  return let final Never #t4 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:16:8: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
String returnMixed(bool b) /*error*/ {
       ^" in null;
}
static method returnAsync1() → asy::Future<dynamic> async {}
static method returnAsync2() → FutureOr<dynamic> async {}
static method returnAsync3() → FutureOr<core::int> async {
  return let final Never #t5 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:27:15: Error: A non-null value must be returned since the return type 'int' doesn't allow null.
FutureOr<int> returnAsync3() async {} // error
              ^" in null;
}
static method returnAsync4() → FutureOr<core::int?> async {}
static method returnAsync5() → dynamic async {}
static method returnAsync6() → asy::Future<core::int?> async {
  return null;
}
static method returnAsync7() → asy::Future<core::int?> async {}
static method yieldSync() → core::Iterable<dynamic> sync* {}
static method yieldAsync() → asy::Stream<dynamic> async* {}
static method caseReturn1(self::Enum e) → self::Enum {
  switch(e) {
    #L1:
    case #C3:
      {
        return e;
      }
    #L2:
    case #C6:
      {
        return e;
      }
    #L3:
    default:
      throw new _in::ReachabilityError::•("`null` encountered as case in a switch expression with a non-nullable enum type.");
  }
}
static method caseReturn2(self::Enum e) → self::Enum {
  switch(e) {
    #L4:
    case #C3:
      {
        return e;
      }
    #L5:
    default:
      {}
  }
  return let final Never #t6 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:54:6: Error: A non-null value must be returned since the return type 'Enum' doesn't allow null.
 - 'Enum' is from 'pkg/front_end/testcases/nnbd/return_null.dart'.
Enum caseReturn2(Enum e) /* error */ {
     ^" in null;
}
static method localFunctions() → dynamic {
  function returnImplicit() → core::String {
    core::print("foo");
    return let final Never #t7 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:63:3: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
  String returnImplicit() /* error */ {
  ^" in null;
  }
  function returnExplicit() → core::String {
    core::print("foo");
    return let final Never #t8 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:69:12: Error: The value 'null' can't be returned from a function with return type 'String' because 'String' is not nullable.
    return null; // error
           ^" in null as{TypeError,ForNonNullableByDefault} core::String;
  }
  function returnMixed(core::bool b) → core::String {
    if(b) {
      core::print("foo");
      return let final Never #t9 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:75:14: Error: The value 'null' can't be returned from a function with return type 'String' because 'String' is not nullable.
      return null; // error
             ^" in null as{TypeError,ForNonNullableByDefault} core::String;
    }
    return let final Never #t10 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:72:3: Error: A non-null value must be returned since the return type 'String' doesn't allow null.
  String returnMixed(bool b) /* error */ {
  ^" in null;
  }
  function returnAsync1() → asy::Future<dynamic> async {}
  function returnAsync2() → FutureOr<dynamic> async {}
  function returnAsync3() → FutureOr<core::int> async {
    return let final Never #t11 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:83:3: Error: A non-null value must be returned since the return type 'int' doesn't allow null.
  FutureOr<int> returnAsync3() async {} // error
  ^" in null;
  }
  function returnAsync4() → FutureOr<core::int?> async {}
  function returnAsync5() → asy::Future<Null> async {}
  function returnAsync6() → asy::Future<core::int?> async {
    return null;
  }
  function returnAsync7() → asy::Future<core::int?> async {}
  function yieldSync() → core::Iterable<dynamic> sync* {}
  function yieldAsync() → asy::Stream<dynamic> async* {}
  function caseReturn1(self::Enum e) → self::Enum {
    switch(e) {
      #L6:
      case #C3:
        {
          return e;
        }
      #L7:
      case #C6:
        {
          return e;
        }
      #L8:
      default:
        throw new _in::ReachabilityError::•("`null` encountered as case in a switch expression with a non-nullable enum type.");
    }
  }
  function caseReturn2(self::Enum e) → self::Enum {
    switch(e) {
      #L9:
      case #C3:
        {
          return e;
        }
      #L10:
      default:
        {}
    }
    return let final Never #t12 = invalid-expression "pkg/front_end/testcases/nnbd/return_null.dart:108:3: Error: A non-null value must be returned since the return type 'Enum' doesn't allow null.
 - 'Enum' is from 'pkg/front_end/testcases/nnbd/return_null.dart'.
  Enum caseReturn2(Enum e) /* error */ {
  ^" in null;
  }
  core::bool b = false;
  core::int? local1 = (() → core::int? {
    if(b)
      return 0;
  }).call();
  core::int? local2 = (() → core::int? {
    if(b)
      return null;
    if(!b)
      return 0;
  }).call();
}
static method main() → dynamic {}

constants  {
  #C1 = 0
  #C2 = "Enum.a"
  #C3 = self::Enum {index:#C1, _name:#C2}
  #C4 = 1
  #C5 = "Enum.b"
  #C6 = self::Enum {index:#C4, _name:#C5}
  #C7 = <self::Enum*>[#C3, #C6]
}


Constructor coverage from constants:
org-dartlang-testcase:///return_null.dart:
- Enum. (from org-dartlang-testcase:///return_null.dart:43:6)
- Object. (from org-dartlang-sdk:///sdk/lib/core/object.dart:25:9)