Cannot access null value from map

[Noobware1]

 final runtime = Compiler().compileWriteAndLoad({
    'example': {
      'main.dart': '''
import 'dart:convert';

String main() {
    final json = jsonDecode("""{
    "title": "One Piece Movie 01",
    "type": "movie",
    "year": 2000,
    "poster": {
      "formats": ["jpeg", "webp"],
      "sm": "one-piece-movie-01-9b77-sm",
      "aspectRatio": 0.7,
      "hq": "one-piece-movie-01-9b77-hq"
    },
    "episode_duration": 3052
  }""");

  bool useEnglish = true;
  final String title;
  final String? englishTitle = json['title_en'];
  if (useEnglish && englishTitle != null && englishTitle.isNotEmpty) {
    title = englishTitle;
  } else {
    title = json['title'];
  }

  return title;

}

'''
    }
  });

  final value = runtime.executeLib('package:example/main.dart', 'main');

  print(value);

Excepted: One Piece Movie 01
Actual:

Unhandled exception:
dart_eval runtime exception: type 'Null' is not a subtype of type '$Instance' in type cast
#0      PushObjectProperty.run (package:dart_eval/src/eval/runtime/ops/objects.dart:283:31)
#1      Runtime.execute (package:dart_eval/src/eval/runtime/runtime.dart:867:12)
#2      Runtime.executeLib (package:dart_eval/src/eval/runtime/runtime.dart:854:12)
at main()

RUNTIME STATE
=============
Program offset: 108
Stack sample: [L4: Instance of '$null', L5: $"title_en", L6: null, L7: Instance of '$null', L8: false, L9: ${true}, L10: ${true}, *L11: null, L12: null, L13: null]
Args sample: []
Call stack: [0, -1]
TRACE:
102: LogicalNot (L8)
103: BoxBool (L3)
104: BoxBool (L9)
105: PushArg (L9)
106: InvokeDynamic (L3.C3)
107: PushReturnValue ()
108: PushObjectProperty (L6.C4)  <<< EXCEPTION
109: PushReturnValue ()
110: PushArg (L11)
111: InvokeDynamic (L10.C3)

#0      Runtime.execute (package:dart_eval/src/eval/runtime/runtime.dart:876:7)
#1      Runtime.executeLib (package:dart_eval/src/eval/runtime/runtime.dart:854:12)
#2      main (file:///C:/Users/freem/OneDrive/Desktop/Projects/dart_eval/test/l.dart:40:25)
#3      _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:295:33)
#4      _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:184:12)

[apps-auth]

#217

Resolve this problem