google oauth – App crash solely on iOS after profitable WebAuthenticator callback through Common App Hyperlink

I am migrating a .NET MAUI iOS authorization movement from one which handles redirect utilizing the now-deprecated customized URL scheme to 1 that employs an Common App Hyperlink verified through a apple-app-site-association file hosted on Firebase.

The callback works. The code is acquired efficiently. The difficulty is that the app crashes upon getting back from the WebAuthenticator authorization movement. This can be a drawback with iOS solely, not Android which works completely utilizing an Android App Hyperlink served by a assetlinks.json file on the identical server.

Quick query

Have you ever gotten this to work? In that case skip all of the laborious particulars and stroll me via it! In any other case, right here is…

What I’ve tried

1. Confirm the Common App Hyperlink utilizing the Developer settings on iPhone.

2. With the app debugger connected, inject the URL in Safari from a particular “redirect check” web page on our server. Confirm {that a} breakpoint in ContinueUserActivity is hit. Confirm that the app doesn’t crash when the Common App Hyperlink is exercised on this method.

3. Setting a breakpoint to examine the returned authorization code. Then returning instantly to keep away from any chance of different exceptions.

buttonLogin.Clicked += async (sender, e) =>
{
    var clientId = "123456789012-1ok9rauo969og7aljrnri1gesrr7l1b3.apps.googleusercontent.com";
    var redirectUrl = "https://myfirebasedomain.com/auth";
    var scopes = "profilepercent20openidpercent20email";
    var authUrl = $"https://accounts.google.com/o/oauth2/auth?client_id={clientId}&redirect_uri={redirectUrl}&immediate=consent&response_type=code&scope={scopes}&access_type=offline";

    Uri authUri = new Uri(authUrl);
    Uri callbackUri = new Uri(redirectUrl);

    WebAuthenticatorResult end result;
    attempt
    {
        end result = await WebAuthenticator.AuthenticateAsync(new WebAuthenticatorOptions
        {
            Url = authUri,
            CallbackUrl = callbackUri,
            PrefersEphemeralWebBrowserSession = true
        });
    }
    catch (TaskCanceledException)
    {
        // 'Not' an error. The person merely cancelled this op.
        return;
    }
    catch (Exception ex)
    {
        Debug.Fail(ex.Message);
        return;
    }

    // Change the authorization code for an entry token

    var payload = new
    {
        code = end result.Properties["code"],
        redirectUri = redirectUrl,
        clientId = clientId,
        key = "internet",
    };
    var jsonPayload = JsonConvert.SerializeObject(payload, Formatting.Indented);
    var content material = new StringContent(jsonPayload, Encoding.UTF8, "software/json");
    utilizing var httpClient = new HttpClient();
    HttpResponseMessage? response = null;
    string? error = null;

    attempt
    {
        // Change token utilizing secret saved on server.

        // We're unable to try this. The async publish causes this 
        // methodology to return, and when it does, the app crashes.
    }
    catch (Exception ex)
    {
        Debug.WriteLine(ex.Message);
        if (response != null)
        {
            error = await response.Content material.ReadAsStringAsync();
        }
        Debug.Fail(error ?? "null");
    }
};

Worth of jsonPayload signifies success

{
  "code": "4/0AanRRrte8fELNx0CyzgsPzrGCo46TLvkp_JhQaG0ao8DMmVLySwN4_8KIfAXNiouGAqkrQ",
  "redirectUri": "https://myfirebasedomain.com/auth",
  "clientId": "123456789012-1ok9rauo969og7aljrnri1gesrr7l1b3.apps.googleusercontent.com",
  "key": "internet"
}

4. Going up a stage to wrap the ContinueUserActivity for exceptions. I can set a breakpoint on return end result. The crash happens if this methodology is allowed to run from that time.

[Register("AppDelegate")]
public class AppDelegate : MauiUIApplicationDelegate
{
    protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
    public override bool ContinueUserActivity(UIApplication software, NSUserActivity userActivity, UIApplicationRestorationHandler completionHandler)
    {
        bool end result = false;
        attempt
        {
            // Calling the BC is what causes the AuthenticateAsync process to finish.
            end result = base.ContinueUserActivity(software, userActivity, completionHandler);
        }
        catch (Exception)
        {
            // NO exception being caught right here.
        }
        return end result;
    }
}

My query:

AFAIK I am doing every thing proper, however can anybody spot any motive for the crash? I am inclined to log it as a bug towards WebAuthenticator for iOS, however earlier than I do something dumb please “examine my work!”

Crash Log (iPhone 11 bodily gadget)

Loaded meeting: Anonymously Hosted DynamicMethods Meeting [External]
INFO:   0x1a3be2db0 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a390977c - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : __UIVIEW_IS_EXECUTING_ANIMATION_COMPLETION_BLOCK__

INFO:   0x1a3c6677c - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO: 014e7888 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : xamarin_get_original_working_directory_path
    0x101842cdc - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1c72e0de8 - /usr/lib/dyld : 

=================================================================
    Fundamental Fault Handle Reporting
=================================================================
Reminiscence round native instruction pointer (0x19e5d634c):0x19e5d633c  21 20 37 91 30 06 00 14 00 00 00 ea 6d ff ff 54  ! 7.0.......m..T
0x19e5d634c  10 00 
INFO: 0x19e5d635c  30 04 00 36 11 
INFO:   0x1a3abee00 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3c02410 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3908434 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3886350 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO: Disposing enter and output streams...
INFO:   0x1a10d5bbc - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : 
    0x1a10d21b0 - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : 
    0x1a1124274 - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : CFRunLoopRunSpecific

INFO:   0x1a38863c0 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a2c47008 - /System/Library/Frameworks/QuartzCore.framework/QuartzCore : 

INFO:   0x1a3908434 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3c02410 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3c02790 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3886350 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3909718 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3ac1944 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1c4e37488 - /System/Library/Frameworks/SafariServices.framework/SafariServices : 

INFO:   0x1a3abee00 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1017efa50 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1017d1d0c - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x22bba8ca8 - /usr/lib/system/libsystem_platform.dylib : 

INFO: 
=================================================================
    Native Crash Reporting
=================================================================

INFO: Received a SIGSEGV whereas executing native code. This normally signifies
a deadly error within the mono runtime or one of many native libraries 
utilized by your software.
=================================================================

=================================================================
    Native stacktrace:
=================================================================

INFO:   0x101804b64 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection

INFO:   0x1a8e0bfa8 - /usr/lib/system/libdispatch.dylib : 
    0x1a8e1aa34 - /usr/lib/system/libdispatch.dylib : 

INFO:   0x1a8e1a64c - /usr/lib/system/libdispatch.dylib : _dispatch_main_queue_callback_4CF

INFO:   0x1014e7888 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : xamarin_get_original_working_directory_path
    0x101842cdc - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1c72e0de8 - /usr/lib/dyld : 

Exiting early on account of double fault.

INFO:   0x1a1124274 - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : CFRunLoopRunSpecific
    0x1ee26d4c0 - /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices : GSEventRunModal
    0x1a3c6677c - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a388ce64 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : UIApplicationMain
    0x1014bc5f4 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : xamarin_UIApplicationMain
    0x101815404 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x101813d04 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x101808714 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1018062ac - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncP
INFO:   0x1a2c47008 - /System/Library/Frameworks/QuartzCore.framework/QuartzCore : 
    0x1a8e0bfa8 - /usr/lib/system/libdispatch.dylib : 
    0x1a8e1aa34 - /usr/lib/system/libdispatch.dylib : 
    0x1a8e1a64c - /usr/lib/system/libdispatch.dylib : _dispatch_main_queue_callback_4CF
    0x1a10d5bbc - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : 
    0x1a10d21b0 - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : 

INFO:   0x1a38863c0 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a390977c - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : __UIVIEW_IS_EXECUTING_ANIMATION_COMPLETION_BLOCK__

INFO:   0x1a3909718 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO: roxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1017d4e84 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x10177c548 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x101782844 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1017da4a0 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection

INFO:   0x1a3c02790 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3ac1944 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:   0x1a3be2db0 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : 

INFO:     at UIKit.UIApplication:Fundamental <0x00152>
      at GoogleDriveLocalSyncProxy.Maui.TestProject.Program:Fundamental <0x0002c>
      at :runtime_invoke_direct_void_string[] <0x0007e>
      at  <0x00000>
=================================================================

=================================================================
    Native Crash Reporting
=================================================================
Received a SIGSEGV whereas executing native code. This normally signifies
a deadly error within the mono runtime or one of many native libraries 
utilized by your software.
=================================================================

An error has occurred within the native fault reporting. Some diagnostic info shall be unavailable.

INFO: 
=================================================================
    Native stacktrace:
=================================================================
    0x101804b64 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1017efa50 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1017d1d0c - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection

INFO: ...

=================================================================
    Managed Stacktrace:
=================================================================
      at  <0xffffffff>
      at UIKit.UIApplication:xamarin_UIApplicationMain <0x000b8>
      at UIKit.UIApplication:UIApplicationMain <0x0006e>

INFO:   0x22bba8ca8 - /usr/lib/system/libsystem_platform.dylib : 
    0x1c4e37488 - /System/Library/Frameworks/SafariServices.framework/SafariServices : 

INFO:  `..T. .......
INFO: fe 77 d3 91 fe ff b4 3f 06 00 f1  0..6..w.....?...
INFO:  ..@...}[email protected]

INFO: 40 f9 02 82 7d 92 51 10 40 f9 31 03 10 36 
INFO:   0x1018062ac - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1017d4e84 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x10177c548 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x101782844 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1017da4a0 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x1
INFO:   0x1a388ce64 - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : UIApplicationMain
    0x1014bc5f4 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : xamarin_UIApplicationMain
    0x101815404 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x101813d04 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection
    0x101808714 - /personal/var/containers/Bundle/Software/0D3ED65C-DDCD-40D0-A24A-BE6EDA007591/IVSoftware.Maui.EchoesSyncProxy.app/IVSoftware.Maui.EchoesSyncProxy : AppleCryptoNative_X509ImportCollection

INFO:   0x1ee26d4c0 - /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices : GSEventRunModal

INFO: 
0x19e5d636c  60 02 00 54 11 20 e0 d2 11 02 11 cb e1 03 10 aa 
INFO: Closing debug connection from distant debugger (TCP)
INFO: Closing debug connection from gadget (USB)
The app has been terminated.
INFO: Disposing enter and output streams...
INFO: Disposing console and debugger streams...
ERROR: An error occurred whereas writing to the debug stream. Particulars: ObjectDisposed_Generic
ObjectDisposed_ObjectName_Name, UsbStream