FirebaseUI-iOS: FirebaseUI / FirebaseAuth Crash on phone number validation

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Step 2: Describe your environment

• Objective C
• iOS version: 11.4
• Firebase SDK version: 5.0.2
• FirebaseUI version: 5.0.1
• CocoaPods Version: 1.5.3

Step 3: Describe the problem:

Getting a crash inside Firebase components logic. (right after typing in phone number and taping ‘Verify’)

I understand it can be wrong use of GTMSessionFetcher in the Firebase Auth code, but also, crash happens inside this code: GTMSessionFetcherService fetcherDidBeginFetching:

Maybe you can suggest at least correct configuration for session fetcher to work properly?

Steps to reproduce:

1. open Firebase Phone login page (see code example below)
2. input your phone number
3. press "Verify’ 💥

Observed Results:

Fatal Exception: NSInvalidArgumentException-[GTMSessionFetcher setFetcher:forTask:]: unrecognized selector sent to instance 0x10e429360 Raw Text
--
0 | CoreFoundation | __exceptionPreprocess
4 | CoreFoundation | _CF_forwarding_prep_0
5 | GTMSessionFetcher | GTMSessionFetcherService.m line 441-[GTMSessionFetcherService fetcherDidBeginFetching:]
6 | GTMSessionFetcher | GTMSessionFetcher.m line 894-[GTMSessionFetcher beginFetchMayDelay:mayAuthorize:]
7 | - | FIRAuthBackend.m line 545-[FIRAuthBackendRPCIssuerImplementation asyncPostToURLWithRequestConfiguration:URL:body:contentType:completionHandler:]
8 | - | FIRAuthBackend.m line 809-[FIRAuthBackendRPCImplementation postWithRequest:response:callback:]
9 | - | FIRAuthBackend.m line 701-[FIRAuthBackendRPCImplementation sendVerificationCode:callback:]
10 | - | FIRAuthBackend.m line 469+[FIRAuthBackend sendVerificationCode:callback:]
11 | - | FIRPhoneAuthProvider.m line 401__110-[FIRPhoneAuthProvider verifyClientAndSendVerificationCodeToPhoneNumber:retryOnInvalidAppCredential:callback:]_block_invoke.205
12 | - | FIRPhoneAuthProvider.m line 410-[FIRPhoneAuthProvider verifyClientWithCompletion:]
13 | - | FIRPhoneAuthProvider.m line 402-[FIRPhoneAuthProvider verifyClientAndSendVerificationCodeToPhoneNumber:retryOnInvalidAppCredential:callback:]
14 | - | FIRPhoneAuthProvider.m line 340__61-[FIRPhoneAuthProvider internalVerifyPhoneNumber:completion:]_block_invoke
15 | - | FIRAuthNotificationManager.m line 173-[FIRAuthNotificationManager callBack]
16 | - | FIRAuthNotificationManager.m line 146-[FIRAuthNotificationManager canHandleNotification:]
17 | - | FIRAuth.m line 1412__33-[FIRAuth canHandleNotification:]_block_invoke

Expected Results:

• Would like to proceed to the SMS code entry page

Relevant Code:

Here’s how I’m using FirebaseAuth

FUIAuth *authUI = [FUIAuth defaultAuthUI];
  authUI.signInWithEmailHidden = YES;
  authUI.delegate = self;
  
  FUIPhoneAuth *provider = [[FUIPhoneAuth alloc] initWithAuthUI:authUI];
  authUI.providers = @[provider];
  [provider signInWithPresentingViewController:vc phoneNumber:mobileNumber];