🐛 [cloud_firestore] Settings.CACHE_SIZE_UNLIMITED stop working on iOS after upgrade Flutter to 3.10.5

[muriloventuroso]

Bug report

After updating Flutter to version 3.10.5 setting cacheSizeBytes: Settings.CACHE_SIZE_UNLIMITED stopped working, showing the error when running the app:

10.10.0 - [FirebaseFirestore][I-FST000001] Invalid argument: Cache size must be set to at least 1048576 bytes
libc++abi: terminating due to uncaught exception of type std::invalid_argument: Cache size must be set to at least 1048576 bytes
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
    frame #0: 0x00000001f5782558 libsystem_kernel.dylib`__pthread_kill + 8
libsystem_kernel.dylib`:
->  0x1f5782558 <+8>:  b.lo   0x1f5782578               ; <+40>
    0x1f578255c <+12>: pacibsp
    0x1f5782560 <+16>: stp    x29, x30, [sp, #-0x10]!
    0x1f5782564 <+20>: mov    x29, sp
Target 0: (Runner) stopped.

Sample code

FirebaseFirestore.instance.settings = const Settings(
            persistenceEnabled: true,
            sslEnabled: true,
            cacheSizeBytes: Settings.CACHE_SIZE_UNLIMITED,
          );

It works if I set a specific value for the cache size:

FirebaseFirestore.instance.settings = const Settings(
            persistenceEnabled: true,
            sslEnabled: true,
            cacheSizeBytes: 1048576 * 10000,
          );

---

Only on IOS.

Flutter doctor

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Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.10.5, on macOS 13.4 22F66 darwin-arm64, locale pt-BR)
[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
[✓] Xcode - develop for iOS and macOS (Xcode 14.3.1)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2021.3)
[✓] VS Code (version 1.79.0)
[✓] Connected device (4 available)
[✓] Network resources

• No issues found!

---

Flutter dependencies

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cloud_firestore: ^4.8.1
firebase_core: ^2.14.0

---

[darshankawar]

Thanks for the report @muriloventuroso
I tried the code sample using latest stable version and running on iOS simulator with which I didn't get the crash as reported. The app compiled and built properly:

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);
  FirebaseFirestore.instance.settings = Settings(persistenceEnabled: true, sslEnabled: true, cacheSizeBytes: Settings.CACHE_SIZE_UNLIMITED);

  if (shouldUseFirestoreEmulator) {
    FirebaseFirestore.instance.useFirestoreEmulator('localhost', 8080);
  }
  runApp(FirestoreExampleApp());
}

Does it occur using simulator or physical device ?

Also, if you comment out the persistence code line, does it run properly ?

There's an open issue related to persistence causing app crash: #11138

[muriloventuroso]

The problem occurs in both, physical and simulator.

If I comment out the persistence code line it runs properly.

[darshankawar]

@muriloventuroso
The issue related to persistence has been fixed as part of #11174 so once new plugin version with the fix is available, use it and run your scenario again to see if the error is fixed at your end or not.

[muriloventuroso]

It is fixed in cloud_firestore version 4.8.2