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AsyncRelayCommand causes InvalidOperation_HandleIsNotInitialized crashes in .NET 10 version of MAUI

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#1,193 0 comentarios 0 reacciones 0 asignados Ver en GitHub

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Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
32/100
Tipo de issue
Error
Claridad
Necesita aclaración
Estado de actividad
Tranquilo
Stack tecnológico
csharp
Área
mobile-dev

Línea de trabajo

Comienza con el monitor de tareas de ejecución de AsyncRelayCommand y la ruta de NotifyCanExecuteChanged mostrada en el stack trace, y después examina cómo llega a MAUI Button.IsEnabled a través de CommandElement.GetCanExecute y TypedBinding. Compara el comportamiento de .NET 9 y .NET 10 en Android y Windows; se considera terminado cuando se haya identificado una reproducción fiable o se haya confirmado la interacción desencadenante sin el crash informado.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

bug :bug:
Describe the bug

After upgrading MAUI from .NET 9 version to .NET 10 (specifically 10.0.51), random crashes are reported. I'm not able to reproduce it but the crash rate surged for both Android and Windows (I don't release for iOS/Mac).

There are 2 scenarios that causes the crash:

  1. Using any AsyncRelayCommand that prevents concurrent execution (which is the default setting). When the command finishes, it runs NotifyCanExecuteChanged internally. That causes IsEnabled property to a Button that uses the command to be updated and that can randomly cause the app to crash with InvalidOperation_HandleIsNotInitialized. Workaround: I managed to mitigate the crashes by creating the commands with AsyncRelayCommandOptions.AllowConcurrentExecutions option and preventing concurrent execution manually in my code. It added a lot of boiler plate code so I don't like the solution but it definitelly helped.

  2. ** Calling NotifyCanExecuteChanged() in the code** can unfurtunatelly also crash the app. This is less frequent by the first case but it happends. My workaround was to create a helper method that calls NotifyCanExecuteChanged() on an AsyncRelayCommand but encloses the call in a try..catch block silently catching all exceptions and reporting them. Again, not a great solution, but necessary for .NET MAUI to keep the crash rate back on a .NET 9 level.

I'm not sure what was changed and if the problem is in MVVM toolkit or MAUI.

Example of the stack traces:

android.runtime.JavaProxyThrowable: [System.InvalidOperationException]: InvalidOperation_HandleIsNotInitialized
  at System.WeakReference`1[[Microsoft.Maui.Controls.BindableObject, Microsoft.Maui.Controls, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].SetTarget + 0x29(Unknown Source:-1)
  at Microsoft.Maui.Controls.Internals.TypedBinding`2[[System.String, System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ApplyToResolvedSource + 0x0(Unknown Source:-1)
  at Microsoft.Maui.Controls.Internals.TypedBinding`2[[System.String, System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Apply + 0xa8(Unknown Source:-1)
  at Microsoft.Maui.Controls.BindableObject.ForceBindingApply + 0x27(Unknown Source:-1)
  at Microsoft.Maui.Controls.CommandElement.GetCanExecute + 0x43(Unknown Source:-1)
  at Microsoft.Maui.Controls.Button.get_IsEnabledCore + 0x8(Unknown Source:-1)
  at Microsoft.Maui.Controls.VisualElement.CoerceIsEnabledProperty + 0x16(Unknown Source:-1)
  at Microsoft.Maui.Controls.BindableObject.SetValueCore + 0xf7(Unknown Source:-1)
  at Microsoft.Maui.Controls.BindableObject.SetValue + 0x55(Unknown Source:-1)
  at Microsoft.Maui.Controls.BindableObjectExtensions.RefreshPropertyValue + 0x45(Unknown Source:-1)
  at Microsoft.Maui.Controls.VisualElement.RefreshIsEnabledProperty + 0x0(Unknown Source:-1)
  at Microsoft.Maui.Controls.Button.Microsoft.Maui.Controls.Internals.ICommandElement.CanExecuteChanged + 0x0(Unknown Source:-1)
  at Microsoft.Maui.Controls.WeakCommandSubscription+CommandCanExecuteSubscription.CanExecuteChanged + 0x2c(Unknown Source:-1)
  at Unknown.Unknown(Unknown Source:-1)
  at CommunityToolkit.Mvvm.Input.AsyncRelayCommand`1+<<set_ExecutionTask>g__MonitorTask|22_0>d[[System.String, System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].MoveNext + 0x111(Unknown Source:-1)
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw + 0x11(Unknown Source:-1)
  at System.Threading.Tasks.Task+<>c.<ThrowAsync>b__124_0 + 0x0(Unknown Source:-1)
  at Android.App.SyncContext+<>c__DisplayClass2_0.<Post>b__0 + 0x0(Unknown Source:-1)
  at Java.Lang.Thread+RunnableImplementor.Run + 0x8(Unknown Source:-1)
  at Java.Lang.IRunnableInvoker.n_Run + 0x16(Unknown Source:-1)
  at mono.java.lang.RunnableImplementor.n_run(RunnableImplementor.java:-2)
  at mono.java.lang.RunnableImplementor.run(RunnableImplementor.java:21)
  at android.os.Handler.handleCallback(Handler.java:995)
  at android.os.Handler.dispatchMessage(Handler.java:103)
  at android.os.Looper.loopOnce(Looper.java:273)
  at android.os.Looper.loop(Looper.java:363)
  at android.app.ActivityThread.main(ActivityThread.java:10060)
  at java.lang.reflect.Method.invoke(Method.java:-2)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:632)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)
Regression

Not sure. It used to work in .NET 9 version of MAUI and started to crash aftter upgrading to .NET 10.

Steps to reproduce

I cannot reproduce it locally. The AppCenter reports that the app crashes sometimes after an hour if its usage, sometimes just in a few minutes. The crashes are random but too frequent to be ignored.

Expected behavior

No crashes as with the .NET 9 version of MAUI

Screenshots

No response

IDE and version

Other

IDE version

VS2026 (18.5.2)

Nuget packages
  • CommunityToolkit.Common
  • CommunityToolkit.Diagnostics
  • CommunityToolkit.HighPerformance
  • CommunityToolkit.Mvvm (aka MVVM Toolkit)
Nuget package version(s)

8.4.2

Additional context

No response

Help us help you

No, just wanted to report this

Lenguaje dominante
C#
Estrellas
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Forks
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