NotSupportedException: "Unsupported expression type: 'Convert'"

[flagbug]

Copying this from PR #656:

When starting the Android-Playground app, it throws a

NotSupportedException: "Unsupported expression type: 'Convert'"

at https://github.com/reactiveui/ReactiveUI/blob/master/ReactiveUI/Platform/Registrations.cs#L46

I can also reproduce this in my apps that I upgraded to RxUI 6

[justinvp]

I'm also running into this in an Android app that I upgraded to RxUI 6.

[bordoley]

Stack trace on android:

[MonoDroid] UNHANDLED EXCEPTION: System.TypeInitializationException: An exception was thrown by the type initializer for ReactiveUI.RxApp ---> System.TypeInitializationException: An exception was thrown by the type initializer for ReactiveUI.AndroidObservableForWidgets ---> System.NotSupportedException: Unsupported expression type: 'Convert'
[MonoDroid]   at ReactiveUI.ExpressionMixins.GetMemberInfo (System.Linq.Expressions.Expression expression) [0x00040] in /Users/paul/code/reactiveui/ReactiveUI/ReactiveUI/ExpressionMixins.cs:68 
[MonoDroid]   at ReactiveUI.AndroidObservableForWidgets.createFromWidget[NumberPicker,ValueChangeEventArgs] (System.Linq.Expressions.Expression`1 property, System.Action`2 addHandler, System.Action`2 removeHandler) [0x00014] in /Users/paul/code/reactiveui/ReactiveUI/ReactiveUI/Android/AndroidObservableForWidgets.cs:88 
[MonoDroid]   at ReactiveUI.AndroidObservableForWidgets..cctor () [0x000ac] in /Users/paul/code/reactiveui/ReactiveUI/ReactiveUI/Android/AndroidObservableForWidgets.cs:24 
[MonoDroid]   --- End of inner exception stack trace ---
[MonoDroid]   at ReactiveUI.PlatformRegistrations.<Register>m__3 () [0x00000] in /Users/paul/code/reactiveui/ReactiveUI/ReactiveUI/Platform/Registrations.cs:46 
[MonoDroid]   at ReactiveUI.DependencyResolverMixins+<InitializeReactiveUI>c__AnonStorey0.<>m__1 (System.Func`1 f, System.Type t) [0x00000] in /Users/paul/code/reactiveui/ReactiveUI/ReactiveUI/IDependencyResolver.cs:29 
[MonoDroid]   at ReactiveUI.PlatformRegistrations.Register (System.Action`2 registerFunction) [0x00087] in /Users/paul/code/reactiveui/ReactiveUI/ReactiveUI/Platform/Registrations.cs:46 
[MonoDroid]   at ReactiveUI.DependencyResolverMixins.InitializeReactiveUI (IMutableDependencyResolver resolver) [0x0003a] in /Users/paul/code/reactiveui/ReactiveUI/ReactiveUI/IDependencyResolver.cs:29 
[MonoDroid]   at ReactiveUI.RxApp.<RxApp>m__0 () [0x0000b] in /Users/paul/code/reactiveui/ReactiveUI/ReactiveUI/RxApp.cs:47 
[MonoDroid]   at Splat.Locator.RegisterResolverCallbackChanged (System.Action callback) [0x0003c] in /Users/paul/code/paulcbetts/splat/Splat/ServiceLocation.cs:87 
[MonoDroid]   at ReactiveUI.RxApp..cctor () [0x00010] in /Users/paul/code/reactiveui/ReactiveUI/ReactiveUI/RxApp.cs:45 
[MonoDroid]   --- End of inner exception stack trace ---

[bordoley]

Any idea when you'll get around to updating nuget with a new release? thanks.

[anaisbetts]

@bordoley Gotta solve that WPF weak reference stuff first