[Auth] async Auth.auth().fetchSignInMethods(forEmail email: String) causes weird crash on the latest version of Firebase Auth SDK 11.1.0

[remziyildirim]

Description

After updating Firebase Auth SDK CocoaPods version from 10.29.0 to 11.1.0, this crash appears in the Firebase Crashlytics Dashboard. I tried to reproduce it on my device, but I couldn't.

It seems it starts to crash inside of the Auth.auth().fetchSignInMethods function. I saw that in the release notes of the version 11.1.0 there is a fix might lead this issue, but I'm not sure.

11.1.0 Release note
[Auth] Fix async/await crash from implicitly unwrapped nil error by @ncooke3 in #13472

We have been using fetchSignInMethods function since October 2023 and have never encountered this crash.

let signInMethods = try await Auth.auth().fetchSignInMethods(forEmail: "emailAddress")
debugPrint("Authentication \(#function) signInMethods: \(signInMethods)")

Reproducing the issue

No response

Firebase SDK Version

11.1.0

Xcode Version

15.3

Installation Method

CocoaPods

Firebase Product(s)

Authentication

Targeted Platforms

iOS

Relevant Log Output

Firebase Crashlytics log;
          Crashed: com.apple.main-thread
0  FirebaseAuth                   0x10054 closure #1 in closure #1 in Auth.fetchSignInMethods(forEmail:) + 116
1  FirebaseAuth                   0x25270 partial apply for thunk for @escaping @callee_guaranteed (@guaranteed AuthDataResult?, @guaranteed Error?) -> () + 24 (<compiler-generated>:24)
2  FirebaseAuth                   0x6dd64 partial apply for specialized closure #1 in static Auth.wrapMainAsync<A>(callback:withParam:error:) + 40
3  FirebaseAuth                   0xd664 thunk for @escaping @callee_guaranteed () -> () + 28
4  libdispatch.dylib              0x637a8 _dispatch_call_block_and_release + 24
5  libdispatch.dylib              0x64780 _dispatch_client_callout + 16
6  libdispatch.dylib              0x45e10 _dispatch_main_queue_drain + 888
7  libdispatch.dylib              0x45a88 _dispatch_main_queue_callback_4CF$VARIANT$armv81 + 36
8  CoreFoundation                 0x919ac __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
9  CoreFoundation                 0x75648 __CFRunLoopRun + 2080
10 CoreFoundation                 0x79d20 CFRunLoopRunSpecific + 584
11 GraphicsServices               0x1998 GSEventRunModal + 160
12 UIKitCore                      0x37134c <redacted> + 868
13 UIKitCore                      0x370fc4 UIApplicationMain + 312
14 HOLIDAY_PIRATES                0x49e5c4 main + 27 (AppDelegate.swift:27)
15 ???                            0x1f049c344 (Missing)

If using Swift Package Manager, the project's Package.resolved

No response

If using CocoaPods, the project's Podfile.lock

PODS:

• Firebase/Analytics (11.1.0):
  • Firebase/Core
• Firebase/Auth (11.1.0):
  • Firebase/CoreOnly
  • FirebaseAuth (~> 11.1.0)
• Firebase/Core (11.1.0):
  • Firebase/CoreOnly
  • FirebaseAnalytics (~> 11.1.0)
• Firebase/CoreOnly (11.1.0):
  • FirebaseCore (= 11.1.0)
• Firebase/Crashlytics (11.1.0):
  • Firebase/CoreOnly
  • FirebaseCrashlytics (~> 11.1.0)
• Firebase/RemoteConfig (11.1.0):
  • Firebase/CoreOnly
  • FirebaseRemoteConfig (~> 11.1.0)
• FirebaseABTesting (11.1.0):
  • FirebaseCore (~> 11.0)
• FirebaseAnalytics (11.1.0):
  • FirebaseAnalytics/AdIdSupport (= 11.1.0)
  • FirebaseCore (~> 11.0)
  • FirebaseInstallations (~> 11.0)
  • GoogleUtilities/AppDelegateSwizzler (~> 8.0)
  • GoogleUtilities/MethodSwizzler (~> 8.0)
  • GoogleUtilities/Network (~> 8.0)
  • "GoogleUtilities/NSData+zlib (~> 8.0)"
  • nanopb (~> 3.30910.0)
• FirebaseAnalytics/AdIdSupport (11.1.0):
  • FirebaseCore (~> 11.0)
  • FirebaseInstallations (~> 11.0)
  • GoogleAppMeasurement (= 11.1.0)
  • GoogleUtilities/AppDelegateSwizzler (~> 8.0)
  • GoogleUtilities/MethodSwizzler (~> 8.0)
  • GoogleUtilities/Network (~> 8.0)
  • "GoogleUtilities/NSData+zlib (~> 8.0)"
  • nanopb (~> 3.30910.0)
• FirebaseAppCheckInterop (11.1.0)
• FirebaseAuth (11.1.0):
  • FirebaseAppCheckInterop (~> 11.0)
  • FirebaseAuthInterop (~> 11.0)
  • FirebaseCore (~> 11.0)
  • FirebaseCoreExtension (~> 11.0)
  • GoogleUtilities/AppDelegateSwizzler (~> 8.0)
  • GoogleUtilities/Environment (~> 8.0)
  • GTMSessionFetcher/Core (~> 3.4)
  • RecaptchaInterop (~> 100.0)
• FirebaseAuthInterop (11.1.0)
• FirebaseCore (11.1.0):
  • FirebaseCoreInternal (~> 11.0)
  • GoogleUtilities/Environment (~> 8.0)
  • GoogleUtilities/Logger (~> 8.0)
• FirebaseCoreExtension (11.1.0):
  • FirebaseCore (~> 11.0)
• FirebaseCoreInternal (11.1.0):
  • "GoogleUtilities/NSData+zlib (~> 8.0)"
• FirebaseCrashlytics (11.1.0):
  • FirebaseCore (~> 11.0)
  • FirebaseInstallations (~> 11.0)
  • FirebaseRemoteConfigInterop (~> 11.0)
  • FirebaseSessions (~> 11.0)
  • GoogleDataTransport (~> 10.0)
  • GoogleUtilities/Environment (~> 8.0)
  • nanopb (~> 3.30910.0)
  • PromisesObjC (~> 2.4)
• FirebaseInstallations (11.1.0):
  • FirebaseCore (~> 11.0)
  • GoogleUtilities/Environment (~> 8.0)
  • GoogleUtilities/UserDefaults (~> 8.0)
  • PromisesObjC (~> 2.4)
• FirebaseRemoteConfig (11.1.0):
  • FirebaseABTesting (~> 11.0)
  • FirebaseCore (~> 11.0)
  • FirebaseInstallations (~> 11.0)
  • FirebaseRemoteConfigInterop (~> 11.0)
  • FirebaseSharedSwift (~> 11.0)
  • GoogleUtilities/Environment (~> 8.0)
  • "GoogleUtilities/NSData+zlib (~> 8.0)"
• FirebaseRemoteConfigInterop (11.1.0)
• FirebaseSessions (11.1.0):
  • FirebaseCore (~> 11.0)
  • FirebaseCoreExtension (~> 11.0)
  • FirebaseInstallations (~> 11.0)
  • GoogleDataTransport (~> 10.0)
  • GoogleUtilities/Environment (~> 8.0)
  • GoogleUtilities/UserDefaults (~> 8.0)
  • nanopb (~> 3.30910.0)
  • PromisesSwift (~> 2.1)
• FirebaseSharedSwift (11.1.0)
• GoogleAppMeasurement (11.1.0):
  • GoogleAppMeasurement/AdIdSupport (= 11.1.0)
  • GoogleUtilities/AppDelegateSwizzler (~> 8.0)
  • GoogleUtilities/MethodSwizzler (~> 8.0)
  • GoogleUtilities/Network (~> 8.0)
  • "GoogleUtilities/NSData+zlib (~> 8.0)"
  • nanopb (~> 3.30910.0)
• GoogleAppMeasurement/AdIdSupport (11.1.0):
  • GoogleAppMeasurement/WithoutAdIdSupport (= 11.1.0)
  • GoogleUtilities/AppDelegateSwizzler (~> 8.0)
  • GoogleUtilities/MethodSwizzler (~> 8.0)
  • GoogleUtilities/Network (~> 8.0)
  • "GoogleUtilities/NSData+zlib (~> 8.0)"
  • nanopb (~> 3.30910.0)
• GoogleAppMeasurement/WithoutAdIdSupport (11.1.0):
  • GoogleUtilities/AppDelegateSwizzler (~> 8.0)
  • GoogleUtilities/MethodSwizzler (~> 8.0)
  • GoogleUtilities/Network (~> 8.0)
  • "GoogleUtilities/NSData+zlib (~> 8.0)"
  • nanopb (~> 3.30910.0)
• GoogleDataTransport (10.1.0):
  • nanopb (~> 3.30910.0)
  • PromisesObjC (~> 2.4)
• GoogleSignIn (8.0.0):
  • AppAuth (< 2.0, >= 1.7.3)
  • AppCheckCore (~> 11.0)
  • GTMAppAuth (< 5.0, >= 4.1.1)
  • GTMSessionFetcher/Core (~> 3.3)
• GoogleTagManager (8.0.0):
  • FirebaseAnalytics (~> 11.0)
• GoogleUtilities/AppDelegateSwizzler (8.0.2):
  • GoogleUtilities/Environment
  • GoogleUtilities/Logger
  • GoogleUtilities/Network
  • GoogleUtilities/Privacy
• GoogleUtilities/Environment (8.0.2):
  • GoogleUtilities/Privacy
• GoogleUtilities/Logger (8.0.2):
  • GoogleUtilities/Environment
  • GoogleUtilities/Privacy
• GoogleUtilities/MethodSwizzler (8.0.2):
  • GoogleUtilities/Logger
  • GoogleUtilities/Privacy
• GoogleUtilities/Network (8.0.2):
  • GoogleUtilities/Logger
  • "GoogleUtilities/NSData+zlib"
  • GoogleUtilities/Privacy
  • GoogleUtilities/Reachability
• "GoogleUtilities/NSData+zlib (8.0.2)":
  • GoogleUtilities/Privacy
• GoogleUtilities/Privacy (8.0.2)
• GoogleUtilities/Reachability (8.0.2):
  • GoogleUtilities/Logger
  • GoogleUtilities/Privacy
• GoogleUtilities/UserDefaults (8.0.2):
  • GoogleUtilities/Logger
  • GoogleUtilities/Privacy
• GSKStretchyHeaderView (1.0.4)
• GTMAppAuth (4.1.1):
  • AppAuth/Core (~> 1.7)
  • GTMSessionFetcher/Core (< 4.0, >= 3.3)
• GTMSessionFetcher/Core (3.5.0)
  ....

DEPENDENCIES:

• Firebase/Analytics
• Firebase/Auth
• Firebase/Crashlytics
• Firebase/RemoteConfig
• GoogleSignIn
• GoogleTagManager
  ...

SPEC REPOS:
https://github.com/CocoaPods/Specs.git:
- Firebase
- FirebaseABTesting
- FirebaseAnalytics
- FirebaseAppCheckInterop
- FirebaseAuth
- FirebaseAuthInterop
- FirebaseCore
- FirebaseCoreExtension
- FirebaseCoreInternal
- FirebaseCrashlytics
- FirebaseInstallations
- FirebaseRemoteConfig
- FirebaseRemoteConfigInterop
- FirebaseSessions
- FirebaseSharedSwift
- GoogleAppMeasurement
- GoogleDataTransport
- GoogleSignIn
- GoogleTagManager
- GoogleUtilities
- GSKStretchyHeaderView
- GTMAppAuth
- GTMSessionFetcher
...

SPEC CHECKSUMS:
Firebase: fdb3bd378401f26a7adfcf446b0a630f8c20c0e8
FirebaseABTesting: c2e22c3aab99afa81d0561708b2c1c356c556976
FirebaseAnalytics: 9fcdb2e9844174bb405b34cc47092c9b91993d83
FirebaseAppCheckInterop: e59b52f2c0e188e6ba77b9e3f6acead2117f2abf
FirebaseAuth: 7348b13e29d46f4a9aa9a343cffa80449db8b116
FirebaseAuthInterop: 49e8faefaf254ce578e278a84a8fe0aebe23b546
FirebaseCore: 6e2a2782e234b14d48e880ed369ac55cda87fed7
FirebaseCoreExtension: aa5c9779c2d0d39d83f1ceb3fdbafe80c4feecfa
FirebaseCoreInternal: adefedc9a88dbe393c4884640a73ec9e8e790f8c
FirebaseCrashlytics: 95cfe27373ff2edab39c28583d93cbf2dfff401d
FirebaseInstallations: d0a8fea5a6fa91abc661591cf57c0f0d70863e57
FirebaseRemoteConfig: 05521e937b72e01847a7128da5a492327364c705
FirebaseRemoteConfigInterop: abf8b1bbc0bf1b84abd22b66746926410bf91a87
FirebaseSessions: 78f137e68dc01ca71606169ba4ac73b98c13752a
FirebaseSharedSwift: 260a35e08943ec810d820a70bc0359136351d0c5
GoogleAppMeasurement: 8bb20efc67c8fc1cff9c42a06c256caf55289bbf
GoogleDataTransport: aae35b7ea0c09004c3797d53c8c41f66f219d6a7
GoogleSignIn: ce8c89bb9b37fb624b92e7514cc67335d1e277e4
GoogleTagManager: 05f257a9afe6e1d6da24f0ee37ab255ce34108b6
GoogleUtilities: 26a3abef001b6533cf678d3eb38fd3f614b7872d
GSKStretchyHeaderView: 9743704c12bdc9cf7c7947bad3af8bf24f7061e3
GTMAppAuth: f69bd07d68cd3b766125f7e072c45d7340dea0de
GTMSessionFetcher: 5aea5ba6bd522a239e236100971f10cb71b96ab6
....

PODFILE CHECKSUM: ...

COCOAPODS: 1.15.2

[ncooke3]

Hi @remziyildirim, sorry for the trouble. Do you have a full crash report that shows what all of the threads were doing at the time of the crash?

[remziyildirim]

Hi @ncooke3, sorry I missed it. Full details of the crash with threads are below

Crashed: com.apple.main-thread
SIGTRAP 0x0000000103a84054

0  FirebaseAuth                   0x10054 closure #1 in closure #1 in Auth.fetchSignInMethods(forEmail:) + 116
1  FirebaseAuth                   0x25270 partial apply for thunk for @escaping @callee_guaranteed (@guaranteed AuthDataResult?, @guaranteed Error?) -> () + 24 (<compiler-generated>:24)
2  FirebaseAuth                   0x6dd64 partial apply for specialized closure #1 in static Auth.wrapMainAsync<A>(callback:withParam:error:) + 40
3  FirebaseAuth                   0xd664 thunk for @escaping @callee_guaranteed () -> () + 28
4  libdispatch.dylib              0x213c _dispatch_call_block_and_release + 32
5  libdispatch.dylib              0x3dd4 _dispatch_client_callout + 20
6  libdispatch.dylib              0x125a4 _dispatch_main_queue_drain + 988
7  libdispatch.dylib              0x121b8 _dispatch_main_queue_callback_4CF + 44
8  CoreFoundation                 0x56710 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16
9  CoreFoundation                 0x53914 __CFRunLoopRun + 1996
10 CoreFoundation                 0x52cd8 CFRunLoopRunSpecific + 608
11 GraphicsServices               0x11a8 GSEventRunModal + 164
12 UIKitCore                      0x40a90c -[UIApplication _run] + 888
13 UIKitCore                      0x4be9d0 UIApplicationMain + 340
14 HOLIDAY_PIRATES                0x49e5c4 main + 27 (AppDelegate.swift:27)
15 ???                            0x1abc09e4c (Missing)

Thread 1
0  libsystem_kernel.dylib         0x1590 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x4980 _pthread_wqthread + 364
2  libsystem_pthread.dylib        0x10cc start_wqthread + 8

com.apple.uikit.eventfetch-thread

0  libsystem_kernel.dylib         0x1808 mach_msg2_trap + 8
1  libsystem_kernel.dylib         0x5008 mach_msg2_internal + 80
2  libsystem_kernel.dylib         0x4f20 mach_msg_overwrite + 436
3  libsystem_kernel.dylib         0x4d60 mach_msg + 24
4  CoreFoundation                 0x53f5c __CFRunLoopServiceMachPort + 160
5  CoreFoundation                 0x53600 __CFRunLoopRun + 1208
6  CoreFoundation                 0x52cd8 CFRunLoopRunSpecific + 608
7  Foundation                     0xc7e4c -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212
8  Foundation                     0xc7c9c -[NSRunLoop(NSRunLoop) runUntilDate:] + 64
9  UIKitCore                      0x41e640 -[UIEventFetcher threadMain] + 420
10 Foundation                     0xde718 __NSThread__start__ + 732
11 libsystem_pthread.dylib        0x606c _pthread_start + 136
12 libsystem_pthread.dylib        0x10d8 thread_start + 8

com.google.firebase.crashlytics.MachExceptionServer

0  libsystem_kernel.dylib         0x1808 mach_msg2_trap + 8
1  libsystem_kernel.dylib         0x5008 mach_msg2_internal + 80
2  libsystem_kernel.dylib         0x4f20 mach_msg_overwrite + 436
3  libsystem_kernel.dylib         0x4d60 mach_msg + 24
4  FirebaseCrashlytics            0x1756c FIRCLSMachExceptionServer + 196 (FIRCLSMachException.c:196)
5  libsystem_pthread.dylib        0x606c _pthread_start + 136
6  libsystem_pthread.dylib        0x10d8 thread_start + 8

 KSCrash Exception Handler (Secondary)

0  libsystem_kernel.dylib         0x1808 mach_msg2_trap + 8
1  libsystem_kernel.dylib         0x5008 mach_msg2_internal + 80
2  libsystem_kernel.dylib         0x4f20 mach_msg_overwrite + 436
3  libsystem_kernel.dylib         0x4d60 mach_msg + 24
4  Bugsnag                        0xba60 ksmachexc_i_handleExceptions + 229 (BSG_KSCrashSentry_MachException.c:229)
5  libsystem_pthread.dylib        0x606c _pthread_start + 136
6  libsystem_pthread.dylib        0x10d8 thread_start + 8

com.apple.NSURLConnectionLoader

0  libsystem_kernel.dylib         0x1808 mach_msg2_trap + 8
1  libsystem_kernel.dylib         0x5008 mach_msg2_internal + 80
2  libsystem_kernel.dylib         0x4f20 mach_msg_overwrite + 436
3  libsystem_kernel.dylib         0x4d60 mach_msg + 24
4  CoreFoundation                 0x53f5c __CFRunLoopServiceMachPort + 160
5  CoreFoundation                 0x53600 __CFRunLoopRun + 1208
6  CoreFoundation                 0x52cd8 CFRunLoopRunSpecific + 608
7  CFNetwork                      0xfdc90 _CFHostIsDomainTopLevel + 108176
8  Foundation                     0xde718 __NSThread__start__ + 732
9  libsystem_pthread.dylib        0x606c _pthread_start + 136
10 libsystem_pthread.dylib        0x10d8 thread_start + 8

Thread 2
0  libsystem_kernel.dylib         0x1590 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x4980 _pthread_wqthread + 364
2  libsystem_pthread.dylib        0x10cc start_wqthread + 8

Thread 3

0  libsystem_kernel.dylib         0x1590 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x4980 _pthread_wqthread + 364
2  libsystem_pthread.dylib        0x10cc start_wqthread + 8

Thread 4

0  libsystem_kernel.dylib         0x1590 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x4980 _pthread_wqthread + 364
2  libsystem_pthread.dylib        0x10cc start_wqthread + 8

Thread 5

0  libsystem_kernel.dylib         0x1590 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x4980 _pthread_wqthread + 364
2  libsystem_pthread.dylib        0x10cc start_wqthread + 8   

JavaScriptCore libpas scavenger

0  libsystem_kernel.dylib         0x71cc __psynch_cvwait + 8
1  libsystem_pthread.dylib        0x36e4 _pthread_cond_wait + 1228
2  JavaScriptCore                 0x155b0a4 scavenger_thread_main + 1512
3  libsystem_pthread.dylib        0x606c _pthread_start + 136
4  libsystem_pthread.dylib        0x10d8 thread_start + 8

Heap Helper Thread

0  libsystem_kernel.dylib         0x71cc __psynch_cvwait + 8
1  libsystem_pthread.dylib        0x36e4 _pthread_cond_wait + 1228
2  JavaScriptCore                 0x82c3c WTF::ThreadCondition::timedWait(WTF::Mutex&, WTF::WallTime) + 240
3  JavaScriptCore                 0x53a1c WTF::ParkingLot::parkConditionallyImpl(void const*, WTF::ScopedLambda<bool ()> const&, WTF::ScopedLambda<void ()> const&, WTF::TimeWithDynamicClockType const&) + 2072
4  JavaScriptCore                 0xaff0 WTF::Detail::CallableWrapper<WTF::AutomaticThread::start(WTF::AbstractLocker const&)::$_0, void>::call() + 460
5  JavaScriptCore                 0x7fe88 WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*) + 352
6  JavaScriptCore                 0x82328 WTF::wtfThreadEntryPoint(void*) + 16
7  libsystem_pthread.dylib        0x606c _pthread_start + 136
8  libsystem_pthread.dylib        0x10d8 thread_start + 8