使用Injectable与GetIt时LocalUserService注册失败但DemoService正常的问题求助

我在Flutter项目中使用Injectable和GetIt时遇到了一个特别奇怪的问题，想请大家帮忙排查下原因。

问题具体场景 #

我有两个服务类，都用@lazySingleton注解标记为懒汉单例：

// DemoService.dart
import 'package:injectable/injectable.dart';

@lazySingleton
class DemoService {}

// LocalUserService.dart
import 'package:injectable/injectable.dart';

@lazySingleton
class LocalUserService {}

但当我用GetIt获取实例时，结果完全不一样：

final DemoService service = getIt(); // ✅ 完全正常，能拿到实例
final LocalUserService service = getIt(); // ❌ 直接抛出错误

错误提示如下：

Bad state: GetIt: Object/factory with type LocalUserService is not registered inside GetIt. (Did you accidentally do GetIt sl=GetIt.instance(); instead of GetIt sl=GetIt.instance; Did you forget to register it?)

我已经自查过的所有点 #

• 反复确认LocalUserService类上确实加了@lazySingleton注解，没有遗漏
• 执行过完整的代码生成命令：flutter pub run build_runner build --delete-conflicting-outputs，全程没有报错
• 打开自动生成的injection.config.dart，确认LocalUserService已经被包含在配置代码里
• main()函数中已经在最开始调用了configureDependencies()
• GetIt的初始化完全正确：final getIt = GetIt.instance;，没有写成GetIt.instance()
• 相同的配置逻辑下，DemoService可以完美获取实例，没有任何问题

我的pubspec.yaml配置 #

name: time_tally
description: "A new Flutter project."
publish_to: 'none'
version: 1.0.0+1

environment:
  sdk: ^3.7.2

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^1.0.8
  firebase_core: ^3.13.0
  cloud_firestore: ^5.6.7
  isar_flutter_libs:
    path: ./local_packages/isar_flutter_libs
  isar: ^3.1.0+1
  path_provider: ^2.1.5
  flutter_bloc: ^9.1.1
  freezed_annotation: ^2.4.1
  json_annotation: ^4.7.0
  firebase_auth: ^5.5.3
  injectable: ^2.5.0
  get_it: ^8.0.3

dev_dependencies:
  flutter_test:
    sdk: flutter
  flutter_lints: ^5.0.0
  isar_generator: ^3.1.0+1
  build_runner: ^2.4.13
  freezed: ^2.4.5
  json_serializable: ^6.7.1
  injectable_generator: ^2.3.0

flutter:
  uses-material-design: true

实在搞不懂为什么两个类配置完全一致，结果却天差地别，有没有大佬遇到过类似的问题？求指点！

内容来源于stack exchange