HELP - App Crash

Question

Created Jul ’22

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Hello,

I'm a Flutter developer and I'm trying to deploy my first IOS app (I don't know anything about the Apple world). I managed to submit the app on the appstore via codeMagic, but I couldn't test it before not having an iPhone or a mac! Apple sent me 2 crashlogs telling me that they tried to launch the app, but it crashed. I understood that I had to symbolic logs to get more info, but I'm reaching the limits of what I can do with the CodeMagic VM (20mn sessions, and I don't know anything about macOS...) I tried symbolizing with macSymbolicator but it doesn't work, it says it doesn't understand crashlogs (unknown format)

Could someone do it for me please and tell me what crashes??

I can provide the artifacts and the 2 crashlogs from Apple

Thank you in advance !

Sebastian, Nantes

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Answer 1

Sebastien44300 OP

Jul ’22

I precise that developed it with Flutter, that's why I managed to push it to appstore without having mac and iphone.

The crashlogs are here : https://drive.google.com/file/d/1ZdSxcr-roAUe3Tm7SLqny8uKef4cMni4/view?usp=sharing https://drive.google.com/file/d/1vTKdI7OPbKtpFO4hydepFduzS_YPzD_O/view?usp=sharing

Can someone symbolicate it forme me please ? Thanks !

0

Answer 2

DTS Engineer OP

Apple

Jul ’22

I couldn't test it before not having an iPhone or a mac!

Realistically, this is not a valid development strategy. While you may be able to get past this problem, you will eventually run into some issue that requires you to test on real hardware. I recommend that you raise this issue with whoever is paying the bills here.

Can someone symbolicate it forme me please ?

No, sorry.

At looked at one of your crash reports and it appears to be slightly munged. Specifically, a JSON-style crash report typically contains two JSON dictionaries:

A header, which is flattened to a single line
The main crash report payload

In your case the header is split across multiple lines. Once I joined that back into a single line, I was able to parse the crash report in Xcode. It shows this:

Exception Type:  EXC_CRASH (SIGABRT)

which indicates that your app crashed itself by calling abort, and this:

Last Exception Backtrace:
0   CoreFoundation    … __exceptionPreprocess + 216
1   libobjc.A.dylib   … objc_exception_throw + 56
2   CoreFoundation    … __CFDictionaryCreateGeneric + 0
3   FirebaseAuth      … +[FIRAuth auth] + 92
4   Runner            … 0x102670000 + 803712
5   Flutter           … 0x103d18000 + 127904
6   GoogleUtilities   … -[GULAppDelegateSwizzler application:donor_didRegisterForRemoteNotificationsWithDeviceToken:] + 264
7   UIKitCore         … __63-[UIApplication pushRegistry:didUpdatePushCredentials:forType:]_block_invoke + 108
8   libdispatch.dylib … _dispatch_call_block_and_release + 24

which might offer some hints as to why it did that.

Share and Enjoy
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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Answer 3

Sebastien44300 OP

Jul ’22

Hi, thanks a lot for Help.

I know that it is not a good strategy to test without a real device, I'm looking for a ios developper too to help me :).

Thanks a lot for this analysis, I see that it's a problem with the firebase cloud messaging config (APN...)

Intersting thins in the comments of the code of this method :

We have to opt out of referencing APNS related App Delegate methods directly to prevent
an Apple review warning email about missing Push Notification Entitlement
(like here: https://github.com/firebase/firebase-ios-sdk/issues/2807). From our experience, the
warning is triggered when any of the symbols is present in the application sent to review, even
if the code is never executed. Because GULAppDelegateSwizzler may be used by applications that
are not using APNS we have to refer to the methods indirectly using selector constructed from
string.

I have to test it with a ios developper to see deeply the problem.

Thanks a lot.

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