Fingerprint plugin crashes on iOS 7: _Wrapper type 'LocalAuthentication.LAContext' is missing its native ObjectiveC class 'LAContext'._

[nielscup]

Fingerprint plugin crashes on iOS 7: Wrapper type 'LocalAuthentication.LAContext' is missing its native ObjectiveC class 'LAContext'.

Steps to reproduce

1. Start app using Fingerprint plugin 1.4.0 on iOS7

Expected behavior

App starts normally

Actual behavior

App crashes

Crashlog

Wrapper type 'LocalAuthentication.LAContext' is missing its native ObjectiveC class 'LAContext'.

at Registrar.DynamicRegistrar.OnRegisterType (Registrar.Registrar+ObjCType type) [0x00113] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/ObjCRuntime/DynamicRegistrar.cs:796 at Registrar.Registrar.RegisterTypeUnsafe (System.Type type, System.Collections.Generic.List1[System.Exception]& exceptions) [0x010b5] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/ObjCRuntime/Registrar.cs:1890 at Registrar.Registrar.RegisterType (System.Type type, System.Collections.Generic.List1[System.Exception]& exceptions) [0x00011] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/ObjCRuntime/Registrar.cs:1064 at Registrar.DynamicRegistrar.Register (System.Type type) [0x00002] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/ObjCRuntime/DynamicRegistrar.cs:1138 at ObjCRuntime.Class.Register (System.Type type) [0x00000] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/ObjCRuntime/Class.cs:161 at ObjCRuntime.Class.GetHandle (System.Type type) [0x00000] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/ObjCRuntime/Class.cs:129 at Plugin.Fingerprint.FingerprintImplementation.CreateLaContext () [0x00001] in <0ce2e501fec54f098d84537f3088c448>:0 at Plugin.Fingerprint.FingerprintImplementation..ctor () [0x00008] in <0ce2e501fec54f098d84537f3088c448>:0 at Plugin.Fingerprint.CrossFingerprint.CreateFingerprint () [0x00001] in <0ce2e501fec54f098d84537f3088c448>:0 at System.Lazy`1[T].CreateValue () [0x00075] in <15e850188d9f425bbeae90f0bbc51e17>:0 --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/_ios-build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 at System.Runtime.CompilerServices.AsyncMethodBuilderCore.m__0 (System.Object state) [0x00000] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/_ios-build/Library/Frameworks/Xamarin.iOS.framework/Versions/git/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/AsyncMethodBuilder.cs:1018 at UIKit.UIKitSynchronizationContext+cAnonStorey0.<>m0 () [0x00000] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/UIKit/UIKitSynchronizationContext.cs:24 at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/Foundation/NSAction.cs:163 at (wrapper managed-to-native) UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr) at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/UIKit/UIApplication.cs:79 at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00038] in /Users/builder/data/lanes/3969/7beaef43/source/xamarin-macios/src/UIKit/UIApplication.cs:63

Configuration

**Version of the Plugin: 1.4.0

**Platform: iOS7

**Device: any with iOS7

[smsissuechecker]

Hi @nielscup,

I'm the friendly issue checker. It seems like (37.50 %) you haven't used our issue template :cry: I think it is very frustrating for the repository owners, if you ignore them.

If you think it's fine to make an exception, just ignore this message. But if you think it was a mistake to delete the template, please close the issue and create a new one.

Thanks!

[smstuebe]

Oupsi it's back. Thanks. I'll check it this week.

[nielscup]

You're welcome! I have created a pull request.

[smstuebe]

@nielscup I've commented the pull request with a minor suggestion / request :)

[smstuebe]

is included in 1.4.1 Sorry that you have to fix the same bug twice :flushed:

[nielscup]

Haha, no problem, apparently I am the only sucker who still supports iOS7!

[smstuebe]

@nielscup: Just out of curiosity: Do you test it automatically or manually?

[nielscup]

Manually.