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[firebase_core] Firebase.initializeApp with demoProjectId crashes on iOS with SIGABRT (FIRInstallations validateAPIKey) - Follow-up to locked #17788

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Dal 13/10/2026.

  • #18792 di @SelaseKay — aperta

Valutazione

Difficoltà
2/5
Tempo stimato
1-3 ore
Idoneità per principianti
22/100
Tipo di issue
Bug
Chiarezza
Specificata chiaramente
Stato di attività
Ferma
Stack tecnologico
dart, ios
Ambito
mobile

Direzione di ricerca

Start in firebase_core/lib/src/firebase.dart, where demoProjectId builds the FirebaseOptions with the hardcoded apiKey '12345'. Reproduce with the linked repro project on an iOS simulator to see the SIGABRT from FIRInstallations validateAPIKey. Pull request #18792 already targets this, so check it before starting. Done means the demo options pass validation on Apple platforms and the repro app launches without crashing.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

Needs Attention platform: ios plugin: core reproduced type: bug type: crash
Description

This is a follow-up to locked issue #17788. I have created a clean, minimal reproduction project with no remote Firebase project, no GoogleService-Info.plist, and no google-services.json:
👉 Reproduction Repository: https://github.com/akurnaz/flutterfire_repro

The issue is that Firebase.initializeApp(demoProjectId: '...') crashes natively on iOS (EXC_CRASH (SIGABRT) / Abort trap: 6) as soon as any package that depends on FirebaseInstallations (e.g., firebase_crashlytics, firebase_auth, or firebase_messaging) is present.

Steps to Reproduce
  1. Clone the reproduction repo: git clone https://github.com/akurnaz/flutterfire_repro.git
  2. Run on an iOS Simulator: flutter run
  3. The application crashes immediately on startup.

Alternatively, in any fresh Flutter app:

  • Add firebase_core: ^4.15.0 and firebase_crashlytics: ^5.4.0 (which pulls in FirebaseInstallations).
  • Call await Firebase.initializeApp(demoProjectId: 'demo-template'); in main().
Crash Stack Trace
Termination: SIGNAL (Abort trap: 6 / SIGABRT)
CoreFoundation - __exceptionPreprocess
libobjc.A.dylib - objc_exception_throw
Runner - +[FIRInstallations validateAPIKey:]
Runner - +[FIRInstallations validateAppOptions:appName:]
Runner - -[FIRInstallations initWithAppOptions:appName:installationsIDController:prefetchAuthToken:]
Runner - -[FIRInstallations initWithApp:]
Runner - __40+[FIRInstallations componentsToRegister]_block_invoke
Runner - -[FIRComponentContainer instantiateInstanceForProtocol:withBlock:]
Runner - -[FIRComponentContainer instanceForProtocol:]
Runner - -[FIRComponentContainer instantiateEagerComponents]
Runner - +[FIRApp configureWithName:options:]
Runner - FLTFirebaseCorePlugin.initializeApp(appName:initializeAppRequest:completion:)
Root Cause
  1. In firebase_core/lib/src/firebase.dart, demoProjectId sets a hardcoded dummy API key:
resolvedOptions = FirebaseOptions(
  apiKey: '12345',
  appId: '1:1:$platformString:1',
  messagingSenderId: '',
  projectId: demoProjectId,
);
  1. In the iOS native SDK (firebase-ios-sdk), FIRInstallations.m strictly validates that the API key is 39 characters and begins with A:
+ (void)validateAPIKey:(nullable NSString *)APIKey {
  if (APIKey.length != kExpectedAPIKeyLength) { // kExpectedAPIKeyLength = 39
    [validationIssues addObject:@"API Key length must be 39 characters"];
  }

  if (![[APIKey substringToIndex:1] isEqualToString:@"A"]) {
    [validationIssues addObject:@"API Key must start with `A`"];
  }
  
  if (validationIssues.count > 0) {
    [NSException raise:kFirebaseInstallationsErrorDomain format:...];
  }
}
  1. Because '12345' fails this validation, an uncaught NSException is thrown, resulting in an uncatchable SIGABRT crash on iOS.
Suggested Fix

In firebase_core/lib/src/firebase.dart, format the dummy apiKey to be a 39-character string starting with A on Apple platforms:

apiKey: (defaultTargetPlatform == TargetPlatform.iOS || defaultTargetPlatform == TargetPlatform.macOS)
    ? 'AIzaSy0000000000000000000000000000000'
    : '12345',
Lingua principale
Dart
Stelle
9.3k
Fork
4.1k
Merge medio
2g 7h
PR unite (30g)
47

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