[BUG] PropertyBindingMixins.Bind crashes #2170

setallunder · 2019-09-18T11:13:44Z

Describe the bug
ReactiveUI.PropertyBindingMixins.Bind throws android.runtime.JavaProxyThrowable: System.Reflection.TargetParameterCountException: Parameter count mismatch.

Steps To Reproduce

Create new Xamarin.Android project;
Add layout with TextView;
Invoke ReactiveUI.PropertyBindingMixins.Bind inside activity to bind TextView.Text with ViewModel for example:

this.Bind(
                ViewModel,
                x => x.ImportantText,
                x => x.SuperTextView.Text);

Launch app on device;
Observe crash.

Expected behavior
No crash

Stacktrace

09-18 13:00:36.914 E/AndroidRuntime(12346): FATAL EXCEPTION: main
09-18 13:00:36.914 E/AndroidRuntime(12346): Process: ReaciveUITest.ReaciveUITest, PID: 12346
09-18 13:00:36.914 E/AndroidRuntime(12346): android.runtime.JavaProxyThrowable: System.Reflection.TargetParameterCountException: Parameter count mismatch.
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method, System.Boolean throwOnBindFailure, System.Boolean allowClosed) [0x000ee] in <ff07eae8184a40a08e79049bbcb31a0e>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method) [0x00000] in <ff07eae8184a40a08e79049bbcb31a0e>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.ReflectionUtils.CreateDelegate[TDelegate] (System.Object o, System.Reflection.MethodInfo method) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.FromEvent`2[TDelegate,TEventArgs].GetHandler (System.Action`1[T] onNext) [0x00025] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.EventProducer`2+Session[TDelegate,TArgs].Initialize () [0x00023] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.EventProducer`2+Session[TDelegate,TArgs].Connect (System.IObserver`1[T] observer) [0x00021] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346): --- End of stack trace from previous location where exception was thrown ---
09-18 13:00:36.914 E/AndroidRuntime(12346): 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.PlatformServices.ExceptionServicesImpl.Rethrow (System.Exception exception) [0x00006] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.ExceptionHelpers.Throw (System.Exception exception) [0x0000a] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Stubs+<>c.<.cctor>b__2_1 (System.Exception ex) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.AnonymousSafeObserver`1[T].OnError (System.Exception error) [0x00010] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Subjects.Subject`1[T].OnError (System.Exception error) [0x00065] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Merge`1+Observables+_+InnerObserver[TSource].OnError (System.Exception error) [0x00016] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.914 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Switch`1+_+InnerObserver[TSource].OnError (System.Exception error) [0x0002f] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].OnError (System.Exception error) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.EventProducer`2+Session[TDelegate,TArgs].Connect (System.IObserver`1[T] observer) [0x0003e] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.EventProducer`2[TDelegate,TArgs].Run (System.IObserver`1[T] observer) [0x00027] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.BasicProducer`1[TSource].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00052] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Select`2+Selector[TSource,TResult].Run (System.Reactive.Linq.ObservableImpl.Select`2+Selector+_[TSource,TResult] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Select`2+Selector[TSource,TResult].Run (System.Reactive.Linq.ObservableImpl.Select`2+Selector+_[TSource,TResult] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.915 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.TailRecursiveSink`1[TSource].Drain () [0x00120] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.TailRecursiveSink`1[TSource].Run (System.Collections.Generic.IEnumerable`1[T] sources) [0x00018] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Concat`1[TSource].Run (System.Reactive.Linq.ObservableImpl.Concat`1+_[TSource] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Switch`1+_[TSource].OnNext (System.IObservable`1[T] value) [0x00052] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnNext (TTarget value) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Select`2+Selector+_[TSource,TResult].OnNext (TSource value) [0x00021] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnNext (TTarget value) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Switch`1+_+InnerObserver[TSource].OnNext (TSource value) [0x00029] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnNext (TTarget value) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.IdentitySink`1[T].OnNext (T value) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnNext (TTarget value) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.ToObservableRecursive`1+_[TSource].LoopRec (System.Reactive.Concurrency.IScheduler scheduler) [0x00085] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.ToObservableRecursive`1+_+<>c[TSource].<Run>b__3_0 (System.Reactive.Concurrency.IScheduler innerScheduler, System.Reactive.Linq.ObservableImpl.ToObservableRecursive`1+_[TSource] this) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Concurrency.ImmediateScheduler.Schedule[TState] (TState state, System.Func`3[T1,T2,TResult] action) [0x00014] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.ToObservableRecursive`1+_[TSource].Run (System.Collections.Generic.IEnumerable`1[T] source, System.Reactive.Concurrency.IScheduler scheduler) [0x00018] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.ToObservableRecursive`1[TSource].Run (System.Reactive.Linq.ObservableImpl.ToObservableRecursive`1+_[TSource] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.TailRecursiveSink`1[TSource].Drain () [0x00120] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.TailRecursiveSink`1[TSource].Run (System.Collections.Generic.IEnumerable`1[T] sources) [0x00018] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Concat`1[TSource].Run (System.Reactive.Linq.ObservableImpl.Concat`1+_[TSource] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.917 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Switch`1+_[TSource].OnNext (System.IObservable`1[T] value) [0x00052] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnNext (TTarget value) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Select`2+Selector+_[TSource,TResult].OnNext (TSource value) [0x00021] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.ReturnImmediate`1[TSource].Run (System.IObserver`1[T] observer) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.BasicProducer`1[TSource].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00052] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Select`2+Selector[TSource,TResult].Run (System.Reactive.Linq.ObservableImpl.Select`2+Selector+_[TSource,TResult] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Switch`1[TSource].Run (System.Reactive.Linq.ObservableImpl.Switch`1+_[TSource] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Select`2+Selector[TSource,TResult].Run (System.Reactive.Linq.ObservableImpl.Select`2+Selector+_[TSource,TResult] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Switch`1[TSource].Run (System.Reactive.Linq.ObservableImpl.Switch`1+_[TSource] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.918 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Where`1+Predicate[TSource].Run (System.Reactive.Linq.ObservableImpl.Where`1+Predicate+_[TSource] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Select`2+Selector[TSource,TResult].Run (System.Reactive.Linq.ObservableImpl.Select`2+Selector+_[TSource,TResult] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.DistinctUntilChanged`2[TSource,TKey].Run (System.Reactive.Linq.ObservableImpl.DistinctUntilChanged`2+_[TSource,TKey] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Select`2+Selector[TSource,TResult].Run (System.Reactive.Linq.ObservableImpl.Select`2+Selector+_[TSource,TResult] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Sink`2[TSource,TTarget].Run (System.IObservable`1[T] source) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Select`2+Selector[TSource,TResult].Run (System.Reactive.Linq.ObservableImpl.Select`2+Selector+_[TSource,TResult] sink) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Producer`2[TTarget,TSink].SubscribeRaw (System.IObserver`1[T] observer, System.Boolean enableSafeguard) [0x00060] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.ObservableExtensions.SubscribeSafe[T] (System.IObservable`1[T] source, System.IObserver`1[T] observer) [0x00036] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.Merge`1+Observables+_[TSource].OnNext (System.IObservable`1[T] value) [0x00013] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Sink`1[TTarget].ForwardOnNext (TTarget value) [0x00000] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.919 E/AndroidRuntime(12346):   at System.Reactive.Linq.ObservableImpl.ToObservableRecursive`1+_[TSource].LoopRec (System.Reactive.Concurrency.IScheduler scheduler) [0x00085] in <f9e209095f5a4628a0b7a00d8a83c3b9>:0 
09-18 13:00:36.922 E/AndroidRuntime(12346):   at ReactiveUI.PropertyBinderImplementation.BindImpl[TViewModel,TView,TVMProp,TVProp,TDontCare] (TViewModel viewModel, TView view, System.Linq.Expressions.Expression`1[TDelegate] vmProperty, System.Linq.Expressions.Expression`1[TDelegate] viewProperty, System.IObservable`1[T] signalViewUpdate, ReactiveUI.PropertyBinderImplementation+OutFunc`2[T1,T2] vmToViewConverter, ReactiveUI.PropertyBinderImplementation+OutFunc`2[T1,T2] viewToVmConverter) [0x001d9] in <c85e2deedba740d5bf58b3f29bb2d97a>:0 
09-18 13:00:36.922 E/AndroidRuntime(12346):   at ReactiveUI.PropertyBinderImplementation.Bind[TViewModel,TView,TVMProp,TVProp,TDontCare] (TViewModel viewModel, TView view, System.Linq.Expressions.Expression`1[TDelegate] vmProperty, System.Linq.Expressions.Expression`1[TDelegate] viewProperty, System.IObservable`1[T] signalViewUpdate, System.Object conversionHint, ReactiveUI.IBindingTypeConverter vmToViewConverterOverride, ReactiveUI.IBindingTypeConverter viewToVMConverterOverride) [0x0008c] in <c85e2deedba740d5bf58b3f29bb2d97a>:0 
09-18 13:00:36.922 E/AndroidRuntime(12346):   at ReactiveUI.PropertyBindingMixins.Bind[TViewModel,TView,TVMProp,TVProp] (TView view, TViewModel viewModel, System.Linq.Expressions.Expression`1[TDelegate] vmProperty, System.Linq.Expressions.Expression`1[TDelegate] viewProperty, System.Object conversionHint, ReactiveUI.IBindingTypeConverter vmToViewConverterOverride, ReactiveUI.IBindingTypeConverter viewToVMConverterOverride) [0x00000] in <c85e2deedba740d5bf58b3f29bb2d97a>:0 
09-18 13:00:36.922 E/AndroidRuntime(12346):   at ReaciveUITest.MainActivity.OnCreate (Android.OS.Bundle savedInstanceState) [0x000b6] in <97283fa6d65c4572be600e1b45bc88f2>:0 
09-18 13:00:36.922 E/AndroidRuntime(12346):   at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_savedInstanceState) [0x00011] in <b62c3fba3fe848f3bb323dbe33464223>:0 
09-18 13:00:36.922 E/AndroidRuntime(12346):   at (wrapper dynamic-method) Android.Runtime.DynamicMethodNameCounter.6(intptr,intptr,intptr)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at md5ac7f87ef6c593a0c21ac7e6bba13fd95.MainActivity.n_onCreate(Native Method)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at md5ac7f87ef6c593a0c21ac7e6bba13fd95.MainActivity.onCreate(MainActivity.java:29)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.app.Activity.performCreate(Activity.java:7088)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.app.Activity.performCreate(Activity.java:7079)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1215)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2895)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.app.ActivityThread.-wrap11(Unknown Source:0)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1616)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.os.Handler.dispatchMessage(Handler.java:106)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.os.Looper.loop(Looper.java:176)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at android.app.ActivityThread.main(ActivityThread.java:6651)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at java.lang.reflect.Method.invoke(Native Method)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
09-18 13:00:36.922 E/AndroidRuntime(12346): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:824)

Environment

OS: Android
Version 8.1.0
Device: Xiaomi Redmi 5 Plus
ReactiveUI Version: 10.1.7

The text was updated successfully, but these errors were encountered:

open-collective-bot · 2019-09-18T11:13:47Z

Hey @setallunder 👋,

Thank you for opening an issue. We will get back to you as soon as we can. Also, check out our Open Collective and consider contributing financially.

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bfmyr4 · 2019-10-09T14:10:09Z

I'm also experiencing this. Android 9, Samsung SM-G892A. Same stack trace.

ajhuntsman · 2019-10-16T16:37:49Z

I just started experiencing this after upgrading from ReactiveUI 9.16.6 to 10.5.1.

glennawatson · 2019-10-16T16:41:49Z

Going to look into this on the weekend unless someone beats me to it. If someone else gets a pr in the mean time happy to take it.

ajhuntsman · 2019-10-16T19:51:17Z

Thanks @glennawatson!

FWIW, there's no runtime problem in our Xamarin.iOS or Xamarin.Forms apps, and the Xamarin.Forms app is targeted only for Android.

It seems to be a problem unique to the Xamarin.Android runtime.

Here are some truncated logs:

Bind_Logs.log

ajhuntsman · 2019-10-17T19:24:09Z

So far, this only seems to happen when binding to a TextView. And if we use a OneWayBind (from ViewModel to View) the crash does not happen. So it seems that the problem originates from reacting to Android TextView changes.

I don't know anything about the ReactiveUI code base, so take this diagnosis with a grain of salt...

The very bottom of PropertyBinderImplementation.BindImpl had a recent change, where the ReactiveBinding constructor parameter changed from:

Tuple<object, bool>
to
(object view, bool isViewModel)

And the logs seem to indicate that the crash is originating from within the Subscribe block, when Reflection.TrySetValueToPropertyChain is being invoked.

Could it be that the tuple declaration is in some way contributing to the runtime reflection crash?

RLittlesII · 2019-10-17T23:04:38Z

@ajhuntsman We converted from Tuples to Value Tuples because of performance. It's odd that the java runtime would have an issue with it.

RLittlesII · 2019-10-18T03:19:20Z

So I looked into this a little more. Seems that the RefCount() is whats blowing up. I will follow up with @glennawatson to see what we can do to resolve this.

ReactiveUI/src/ReactiveUI/Bindings/Property/PropertyBinderImplementation.cs

Line 631 in e86935b

    
           IObservable<(object view, bool isViewModel)> changes = changeWithValues.Where(value => value != null).Select(value => (value.Item1, value.Item2)).Publish().RefCount();

glennawatson · 2019-10-21T12:30:27Z

We tracked down the bug and the location (actually to do with some changes with the Reflection.cs file), so hopefully can get a patch out in the next few days.

ryanholden8 · 2019-10-21T16:10:52Z

Just to add more info to this issue: Looks like this exception also happens when binding to Android.Widget.Switch and not just TextViews. Probably any two-way binding is where the crash occurs, I would guess.

arda-a · 2019-11-16T08:39:00Z

Any update or a quick workaround for this ?
Recently updated to the latest version and it seems to be happening on all two way bindings in Xamarin.Android platform.

RLittlesII · 2019-11-19T15:20:39Z

Update

It seems there is something about the reflection used to bind the properties that is causing this issue.

We have a WIP pull request where @glennawatson and I have been doing various fixes trying to address this issue. We rolled back the v10 change and that did not seem to fix the problem, which we found odd.

@arda-a A work around would be to just assign the values in the Subscribe() function on WhenAnyValue of the View Model property. If you are using ReactiveUI.Events you can subscribe to the event for the text box change as an alternative.

@ajhuntsman That was the correct place, it seems the reflection is more the culprit as I did a bit of changing around the ValueTuple with no difference. Still have not found the root of this problem though.

KevinvdBurg · 2020-01-16T13:49:27Z

I'm updating from ReactiveUI 9.20.1 to 11.1.6 and I'm encountering the same bug.

glennawatson · 2020-01-17T00:28:04Z

We've passed this bug onto the Reactive Extensions team. See dotnet/reactive#1129 to track it.

github-actions · 2021-11-23T20:56:00Z

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

setallunder added the bug label Sep 18, 2019

RLittlesII mentioned this issue Oct 18, 2019

fix: RefCount of ValueTuple breaks Xamarin.Android #2221

Closed

2 tasks

RLittlesII mentioned this issue Dec 5, 2019

[BUG] EditText in ReactiveUI.Android causes a crash with Bind #2265

Closed

winterdouglas mentioned this issue Dec 7, 2019

[BUG] Sextant sample navigation crashes with Android.Util.AndroidRuntimeException: 'Animators may only be run on Looper threads' reactiveui/Sextant#171

Closed

RLittlesII mentioned this issue Jan 16, 2020

ReactiveUI binding crash Xamarin.Android dotnet/reactive#1129

Closed

glennawatson mentioned this issue Apr 25, 2020

fix: Fix android crashing on text binding #2390

Merged

glennawatson closed this as completed in #2390 Apr 25, 2020

github-actions bot locked as resolved and limited conversation to collaborators Nov 23, 2021

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[BUG] PropertyBindingMixins.Bind crashes #2170

[BUG] PropertyBindingMixins.Bind crashes #2170

setallunder commented Sep 18, 2019 •

edited by glennawatson

open-collective-bot bot commented Sep 18, 2019 •

edited by unfurl-links bot

bfmyr4 commented Oct 9, 2019

ajhuntsman commented Oct 16, 2019

glennawatson commented Oct 16, 2019

ajhuntsman commented Oct 16, 2019 •

edited

ajhuntsman commented Oct 17, 2019

RLittlesII commented Oct 17, 2019

RLittlesII commented Oct 18, 2019

glennawatson commented Oct 21, 2019

ryanholden8 commented Oct 21, 2019

arda-a commented Nov 16, 2019

RLittlesII commented Nov 19, 2019

KevinvdBurg commented Jan 16, 2020

glennawatson commented Jan 17, 2020 via email •

edited

github-actions bot commented Nov 23, 2021

[BUG] PropertyBindingMixins.Bind crashes #2170

[BUG] PropertyBindingMixins.Bind crashes #2170

Comments

setallunder commented Sep 18, 2019 • edited by glennawatson

open-collective-bot bot commented Sep 18, 2019 • edited by unfurl-links bot

bfmyr4 commented Oct 9, 2019

ajhuntsman commented Oct 16, 2019

glennawatson commented Oct 16, 2019

ajhuntsman commented Oct 16, 2019 • edited

ajhuntsman commented Oct 17, 2019

RLittlesII commented Oct 17, 2019

RLittlesII commented Oct 18, 2019

glennawatson commented Oct 21, 2019

ryanholden8 commented Oct 21, 2019

arda-a commented Nov 16, 2019

RLittlesII commented Nov 19, 2019

Update

KevinvdBurg commented Jan 16, 2020

glennawatson commented Jan 17, 2020 via email • edited

github-actions bot commented Nov 23, 2021

setallunder commented Sep 18, 2019 •

edited by glennawatson

open-collective-bot bot commented Sep 18, 2019 •

edited by unfurl-links bot

ajhuntsman commented Oct 16, 2019 •

edited

glennawatson commented Jan 17, 2020 via email •

edited