firebase-ios-sdk: Crashed: com.google.iid-token-operations (QOS: UTILITY)

Environment

• Xcode version: 8.3.3
• Firebase SDK version: 4.4.0

POD file

    pod 'Google-Mobile-Ads-SDK', '7.17.0'
    pod 'Firebase', '~> 4.4'
    pod 'FirebaseAnalytics', '~> 4.0'
    pod 'FirebaseRemoteConfig', '~> 2.0'
    pod 'ATInternet-iOS-ObjC-SDK', '~> 2.2'
    pod 'GoogleTagManager', '~> 6.0'

Resuted pod file Lock

- Firebase (4.4.0):
    - Firebase/Core (= 4.4.0)
  - Firebase/Core (4.4.0):
    - FirebaseAnalytics (= 4.0.4)
    - FirebaseCore (= 4.0.9)
  - FirebaseAnalytics (4.0.4):
    - FirebaseCore (~> 4.0)
    - FirebaseInstanceID (~> 2.0)
    - GoogleToolboxForMac/NSData+zlib (~> 2.1)
    - nanopb (~> 0.3)
  - FirebaseCore (4.0.9):
    - GoogleToolboxForMac/NSData+zlib (~> 2.1)
    - nanopb (~> 0.3)
  - FirebaseInstanceID (2.0.5)
  - FirebaseRemoteConfig (2.0.3):
    - FirebaseAnalytics (~> 4.0)
    - FirebaseInstanceID (~> 2.0)
    - GoogleToolboxForMac/NSData+zlib (~> 2.1)
    - Protobuf (~> 3.1)

The problem

It append on few of my user since, I have this crash on crashlytics.

Crashlytics indicate : The stack trace indicates that heap corruption may have caused your app to crash. Memory corruption can occur pretty easily from freeing a dangling pointer, a thread race, or bad pointer arithmetic. The important thing to keep in mind is that the resulting crash may happen long after the initial corruption. As a result, the stack trace for this crash might not provide any clues to the location of the bug in your code. However, you can still fix memory issues with tools from Apple. For speedy resolution of memory corruption issues, we recommend regularly auditing your app with Xcode’s memory debugging facilities: Visual Memory Debugger, Zombies Instrument, Address Sanitizer, Thread Sanitizer and malloc diagnostics.

LOGS

Crashed: com.google.iid-token-operations (QOS: UTILITY)
0  libobjc.A.dylib                0x184dfc1a0 objc_retain + 16
1  Myapp                  0x101378534 +[FIRLoggerWrapper logWithLevel:withService:withCode:withMessage:withArgs:] + 4281264
2  CoreFoundation                 0x1858d36a0 __invoking___ + 144
3  CoreFoundation                 0x1857b2820 -[NSInvocation invoke] + 292
4  Myapp                  0x101398038 +[FIRInstanceIDLogger logWithLevel:withService:withCode:withMessage:withArgs:] + 4411060
5  Myapp                  0x1013981ec -[FIRInstanceIDLogger logFuncDebug:messageCode:msg:] + 4411496
6  Myapp                  0x10139a97c -[FIRInstanceIDTokenFetchOperation performTokenOperation] + 4421624
7  Foundation                     0x186298004 __NSOQSchedule_f + 404
8  libdispatch.dylib              0x185251048 _dispatch_client_callout + 16
9  libdispatch.dylib              0x1852593d4 _dispatch_continuation_pop$VARIANT$mp + 428
10 libdispatch.dylib              0x185257cd4 _dispatch_async_redirect_invoke$VARIANT$mp + 604
11 libdispatch.dylib              0x18525e1c8 _dispatch_root_queue_drain + 596
12 libdispatch.dylib              0x18525df10 _dispatch_worker_thread3 + 120
13 libsystem_pthread.dylib        0x1854f7130 _pthread_wqthread + 1268
14 libsystem_pthread.dylib        0x1854f6c30 start_wqthread + 4

Relevant Code:

I’m using a subclasse of NSOperation to execute this code:

- (void)main {
    @try {
      
        // Add test for min version
        self.remoteConfig = [FIRRemoteConfig remoteConfig];
        FIRRemoteConfigSettings *remoteConfigSettings = [[FIRRemoteConfigSettings alloc] initWithDeveloperModeEnabled:NO];
        self.remoteConfig.configSettings = remoteConfigSettings;
        
        [self.remoteConfig fetchWithExpirationDuration:5 completionHandler:^(FIRRemoteConfigFetchStatus status, NSError *error) {
            if (status == FIRRemoteConfigFetchStatusSuccess) {
                [self.remoteConfig activateFetched];
            }
            [self completeOperation];
        }];
        
    }
    @catch(...) {
        // Do not rethrow exceptions.
    }
}

I’m also using FirebaseAnalytics but I can’t found in the logs witch part of my code generate this crash. Which seems to be internal.