SIGABRT: Failed to marshal the Objective-C object 0x11a2bce80 (type: Xamarin_Forms_Platform_iOS_HeaderWrapperView)

Question

Stack trace

Runtime.MissingCtor (System.IntPtr ptr, System.IntPtr klass, System.Type type, ObjCRuntime.Runtime+MissingCtorResolution resolution) /Users/builder/azdo/_work/1/s/xamarin-macios/src/ObjCRuntime/Runtime.cs:1092
Runtime.ConstructNSObject[T] (System.IntPtr ptr, System.Type type, ObjCRuntime.Runtime+MissingCtorResolution missingCtorResolution)
Runtime.GetNSObject[T] (System.IntPtr ptr)
UIView.get_Superview () /Users/builder/azdo/_work/1/s/xamarin-macios/src/build/ios/native/UIKit/UIView.g.cs:4802
VisualElementRenderer1[TElement].UpdateParentPageAccessibilityElements () VisualElementRenderer1[TElement].OnElementPropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e)
BoxRenderer.OnElementPropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) D:\a\1\s\Xamarin.Forms.Platform.iOS\Renderers\BoxRenderer.cs:70
(wrapper delegate-invoke) <Module>.invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)
BindableObject.OnPropertyChanged (System.String propertyName) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:266
Element.OnPropertyChanged (System.String propertyName) D:\a\1\s\Xamarin.Forms.Core\Element.cs:362
BindableObject.SetValueActual (Xamarin.Forms.BindableProperty property, Xamarin.Forms.BindableObject+BindablePropertyContext context, System.Object value, System.Boolean currentlyApplying, Xamarin.Forms.Internals.SetValueFlags attributes, System.Boolean silent) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:510
BindableObject.SetValueCore (Xamarin.Forms.BindableProperty property, System.Object value, Xamarin.Forms.Internals.SetValueFlags attributes, Xamarin.Forms.BindableObject+SetValuePrivateFlags privateAttributes) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:446
BindingExpression.ApplyCore (System.Object sourceObject, Xamarin.Forms.BindableObject target, Xamarin.Forms.BindableProperty property, System.Boolean fromTarget) D:\a\1\s\Xamarin.Forms.Core\BindingExpression.cs:160
BindingExpression.Apply (System.Object sourceObject, Xamarin.Forms.BindableObject target, Xamarin.Forms.BindableProperty property) D:\a\1\s\Xamarin.Forms.Core\BindingExpression.cs:75
Binding.Apply (System.Object context, Xamarin.Forms.BindableObject bindObj, Xamarin.Forms.BindableProperty targetProperty, System.Boolean fromBindingContextChanged) D:\a\1\s\Xamarin.Forms.Core\Binding.cs:143
BindableObject.ApplyBindings (System.Boolean skipBindingContext, System.Boolean fromBindingContextChanged) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:530
BindableObject.SetInheritedBindingContext (Xamarin.Forms.BindableObject bindable, System.Object value) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:246
Element.SetChildInheritedBindingContext (Xamarin.Forms.Element child, System.Object context) D:\a\1\s\Xamarin.Forms.Core\Element.cs:479
Element.<OnBindingContextChanged>b__83_0 (Xamarin.Forms.BindableObject child, System.Object bc) D:\a\1\s\Xamarin.Forms.Core\Element.cs:310
BindableObjectExtensions.PropagateBindingContext[T] (Xamarin.Forms.BindableObject self, System.Collections.Generic.IList1[T] children, System.Action2[T1,T2] setChildBindingContext)
Element.OnBindingContextChanged () D:\a\1\s\Xamarin.Forms.Core\Element.cs:308
VisualElement.OnBindingContextChanged () D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:827
View.OnBindingContextChanged () D:\a\1\s\Xamarin.Forms.Core\View.cs:158
BindableObject.SetInheritedBindingContext (Xamarin.Forms.BindableObject bindable, System.Object value) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:247
Element.SetChildInheritedBindingContext (Xamarin.Forms.Element child, System.Object context) D:\a\1\s\Xamarin.Forms.Core\Element.cs:479
Element.<OnBindingContextChanged>b__83_0 (Xamarin.Forms.BindableObject child, System.Object bc) D:\a\1\s\Xamarin.Forms.Core\Element.cs:310
BindableObjectExtensions.PropagateBindingContext[T] (Xamarin.Forms.BindableObject self, System.Collections.Generic.IList1[T] children, System.Action2[T1,T2] setChildBindingContext)
Element.OnBindingContextChanged () D:\a\1\s\Xamarin.Forms.Core\Element.cs:308
Cell.OnBindingContextChanged () D:\a\1\s\Xamarin.Forms.Core\Cells\Cell.cs:156
BindableObject.BindingContextPropertyChanged (Xamarin.Forms.BindableObject bindable, System.Object oldvalue, System.Object newvalue) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:550
BindableObject.SetValueActual (Xamarin.Forms.BindableProperty property, Xamarin.Forms.BindableObject+BindablePropertyContext context, System.Object value, System.Boolean currentlyApplying, Xamarin.Forms.Internals.SetValueFlags attributes, System.Boolean silent) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:512
BindableObject.SetValueCore (Xamarin.Forms.BindableProperty property, System.Object value, Xamarin.Forms.Internals.SetValueFlags attributes, Xamarin.Forms.BindableObject+SetValuePrivateFlags privateAttributes) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:446
BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value, System.Boolean fromStyle, System.Boolean checkAccess) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:374
BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:349
BindableObject.set_BindingContext (System.Object value) D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:31
TemplatedItemsList`2[TView,TItem].UnhookItem (TItem item)
AsyncMethodBuilderCore+<>c.<ThrowAsync>b__7_0 (System.Object state) /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/AsyncMethodBuilder.cs:1021
NSAsyncSynchronizationContextDispatcher.Apply () /Users/builder/azdo/_work/1/s/xamarin-macios/src/Foundation/NSAction.cs:178
(wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain(int,string[],intptr,intptr)
UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:86
UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:65
Application.Main (System.String[] args)

Answer 1

Hello,
Welcome to our Microsoft Q&A platform!

Runtime.MissingCtor (System.IntPtr ptr, System.IntPtr klass, System.Type type, ObjCRuntime.Runtime+MissingCtorResolution resolution)

System.IntPtr ptr, System.Type type, ObjCRuntime.Runtime+MissingCtorResolution missingCtorResolution

It means constructor of your class is missing. HeaderWrapperView is used in ListViewRenderer, I think it crashes when you use a Listview with header. You could have a try to create CustomRenderer to avoid crashes. You could also use CollectionView instead of Listview.

[assembly: ExportRenderer (typeof (Label), typeof (CustomLabelRenderer))]  
namespace MyNamespace  
{  

    public class CustomLabelRenderer : LabelRenderer  
    {  
        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)  
        {  
            //Break possibility to go to VisualElement crashing code...  
            if (e.PropertyName == VisualElement.IsVisibleProperty.PropertyName)  
            {  
                return;  
            }  

            base.OnElementPropertyChanged(sender, e);  
        }  
    }  
}  

Best Regards,
Wenyan Zhang

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