Critical bug in version 19.2.12 prevents application from start #61644
Description
Which @angular/* package(s) are the source of the bug?
Don't known / other
Is this a regression?
Yes
Description
PR #61354 introduces a critical bug.
The application can't be started at all, the error occurs: "RuntimeError: NG0200: Circular dependency in DI detected for _ApplicationRef. Find more at https://angular.dev/errors/NG0200".
It seems the source of the problem is the code: private readonly appRef = inject(ApplicationRef);
Please provide a link to a minimal reproduction of the bug
The application is configured with provideHttpClient( withFetch(), withInterceptorsFromDi() ).
Exception occurs in method hydrate(token, record, flags) while resolving ApplicationRef in the FetchBackend class:
if (record.value === CIRCULAR) {
throwCyclicDependencyError(stringify(token));
The token here is the "class _ApplicationRef" and the record is the "{ factory: ƒ ApplicationRef_Factory(ngFactoryType), ... }".
Please provide the exception or error you saw
RuntimeError: NG0200: Circular dependency in DI detected for _ApplicationRef. Find more at https://angular.dev/errors/NG0200
at throwCyclicDependencyError (core.mjs:978:9)
at R3Injector.hydrate (core.mjs:2238:9)
at R3Injector.get (core.mjs:2121:23)
at injectInjectorOnly (core.mjs:1111:28)
at ɵɵinject (core.mjs:1117:40)
at inject (core.mjs:1202:10)
at <instance_members_initializer> (module-BQ-7fJZl.mjs:1620:12)
at new _FetchBackend (module-BQ-7fJZl.mjs:1612:1)
at Object.FetchBackend_Factory [as factory] (module-BQ-7fJZl.mjs:1832:12)
at core.mjs:2243:35
at runInInjectorProfilerContext (core.mjs:881:5)
at R3Injector.hydrate (core.mjs:2242:11)
at R3Injector.get (core.mjs:2121:23)
at injectInjectorOnly (core.mjs:1111:28)
at ɵɵinject (core.mjs:1117:40)
Please provide the environment you discovered this bug in (run ng version)
Angular CLI: 19.2.12 Node: 24.1.0 (Unsupported) Package Manager: npm 11.4.1 OS: win32 x64 Angular: 19.2.12 ... animations, cli, common, compiler, compiler-cli, core, forms ... platform-browser, router Package Version --------------------------------------------------------- @angular-devkit/architect 0.1902.12 @angular-devkit/build-angular 19.2.12 @angular-devkit/core 19.2.12 @angular-devkit/schematics 19.2.12 @schematics/angular 19.2.12 rxjs 7.8.2 typescript 5.8.3 zone.js 0.15.1
Anything else?
This is the regression, because prior to the version 19.2.12 application started successfully.