Null check operator used on a null value. Error thrown Instance of 'ErrorDescription'. about get_it HOT 3 CLOSED

Hey, honestly I'm not sure I know what you are trying to do in that piece of code. Also I would only use registerLazySingletonAsync if it is absolutely necessary.

The error signals that this happened indeed because you tried to access a not-ready instance.

please study https://github.com/fluttercommunity/get_it#synchronizing-asynchronous-initializations-of-singletons
carefully or watch my talk on get_it https://www.youtube.com/watch?v=YJ52kSfSMyM&list=PL-BFoWYMGZ2TvwY0uf1fBJB1358utBlAz&index=10&t=14s&pp=gAQBiAQB

from get_it.

Thanks for getting back.

registerService uses a LoadableService mixin that all implement load() so I can register get it services like this and not have to keep calling load() on each one.

    registerService<SolutionContentService>(() => SolutionContentService());
    registerService<ProblemContentService>(() => ProblemContentService(),
        dependsOn: [SolutionContentService]);
    registerService<MaintenanceContentService>(
        () => MaintenanceContentService(),
        lazy: true);
    registerService<ProblemSeverityStrings>(() => ProblemSeverityStrings());
    registerService<TestStrips>(() => TestStrips());
    registerService<AchievementBadges>(() => AchievementBadges());

mixin LoadableService on Object {
  Future load();

  Future<dynamic> parseJsonFromAssets(String assetsPath) async {
    WidgetsFlutterBinding.ensureInitialized();

    return rootBundle
        .loadString(assetsPath)
        .then((jsonStr) => jsonDecode(jsonStr));
  }
}

A user found that reinstalling the app worked for them. This appears to happening for upgrade cases only so far. My hunch now is a bizarre exception thrown in my load() when parsing the json that would cause the singleton to never instantiate.

from get_it.

I'm not sure if I can be any help on this here. closing it for now

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