生成flutter包pub run build_runner build

Question

[INFO] Generating build script...
[INFO] Generating build script completed, took 684ms

[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 200ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 1.5s

[INFO] Running build...
[INFO] Running build completed, took 75ms

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 155ms

[SEVERE] inject_generator:inject_generator on lib/component/app_component.dart (cached):
merchant|lib/component/app_component.dart at 7:1: injector class must declare at least one provider:

@Injector(const [PreferenceModule]) abstract class AppComponent {static Future<AppComponent> create(PreferenceModule preferenceModule) async {return await g.AppComponent$Injector.create(preferenceModule);}}

[SEVERE] Failed after 250ms
pub finished with exit code 1

这是我运行命令后得到的：

flutter包pub run build_runner build

谁能帮助我该怎么办？