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.NET MAUI is the .NET Multi-platform App UI, a framework for building native device applications spanning mobile, tablet, and desktop.
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[MAUI]Clicking the "I5_EmptyView with EmptyViewTemplate for Data template selector" page throws an exception #25224

Open Zhanglirong-Winnie opened 3 weeks ago

Zhanglirong-Winnie commented 3 weeks ago

Description

Clicking the "I5_EmptyView with EmptyViewTemplate for Data template selector" page throws an exception Affected case: I5_EmptyView with EmptyViewTemplate for Data template selector

Steps to Reproduce

  1. Deploy https://devdiv.visualstudio.com/Pkgs/_git/VS.TestAssets.Xaml?path=/Assets/Projects/ManualMauiTests to iOS and MacCatlystt.
  2. Navigate to 'I5_EmptyView' ->'EmptyView with EmptyViewTemplate for Data template selector'
  3. Observe the page display

Actual Behavior: MacCatalyst: Clicking the "I5_EmptyView with EmptyViewTemplate for Data template selector" page not responding iOS: Clicking the "I5_EmptyView with EmptyViewTemplate for Data template selector" page throws an exception Image

Expected Behavior: Clicking the "I5_EmptyView with EmptyViewTemplate for Data template selector" page displays normally

Link to public reproduction project repository

https://devdiv.visualstudio.com/Pkgs/_git/VS.TestAssets.Xaml?path=/Assets/Projects/ManualMauiTests

Version with bug

Microsoft.Maui.Controls 8.0.99-ci.net8.24511.3

Is this a regression from previous behavior?

Yes, this is a regression, The issue not repro on 8.0.99-ci.net8.24509.1 & 8.0.91 & 8.0.3

Affected platforms

iOS, macOS

Relevant log output

Exception has occurred: System.NullReferenceException •
Object reference not set to an instance of an object. at ManualMauiTests.Controls.SearchTermDataTemplateSelector.OnSelectTemplate(Object item, BindableObject container) in /Users/vstester/Desktop/ManualMauiTests/Controls/SearchTermDataTemplateSelector.cs:11 at at Microsoft.Maui.Controls.DataTemplateSelector.SelectTemplate(Object item, BindableObject container) at at Microsoft.Maui.Controls.Internals.DataTemplateExtensions.SelectDataTemplate(DataTemplate self, Object item, BindableObject container) at at Microsoft.Maui.Controls.Handlers.Items.TemplateHelpers.RealizeView(Object view, DataTemplate viewTemplate, ItemsView itemsView) at at Microsoft.Maui.Controls.Handlers.Items.ItemsViewController1[[Microsoft.Maui.Controls.ReorderableItemsView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].UpdateView(Object view, DataTemplate viewTemplate, UIView& uiView, VisualElement& formsElement) at at Microsoft.Maui.Controls.Handlers.Items.ItemsViewController1[[Microsoft.Maui.Controls.ReorderableItemsView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].UpdateEmptyView() at at Microsoft.Maui.Controls.Handlers.Items.ItemsViewController1[[Microsoft.Maui.Controls.ReorderableItemsView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].EnsureLayoutInitialized() at at Microsoft.Maui.Controls.Handlers.Items.ItemsViewController1[[Microsoft.Maui.Controls.ReorderableItemsView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].ViewDidLoad() at UIKit.UIViewController.get_View() in /Users/builder/azdo/_work/1/s/xamarin-macios/src/build/dotnet/ios/generated-sources/UIKit/UIViewController.g.cs:3355 at at Microsoft.Maui.Controls.Handlers.Items.ItemsViewHandler1[[Microsoft.Maui.Controls.ReorderableItemsView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].CreatePlatformView() at at Microsoft.Maui.Handlers.ViewHandler2[[Microsoft.Maui.Controls.ReorderableItemsView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[UIKit.UIView, Microsoft.iOS, Version=17.5.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].OnCreatePlatformView() at at Microsoft.Maui.Controls.Handlers.Items.ItemsViewHandler1[[Microsoft.Maui.Controls.ReorderableItemsView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].OnCreatePlatformView() at at Microsoft.Maui.Handlers.ViewHandler.OnCreatePlatformElement() at at Microsoft.Maui.Handlers.ElementHandler.CreatePlatformElement() at at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view) at at Microsoft.Maui.Handlers.ViewHandler2[[Microsoft.Maui.Controls.ReorderableItemsView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[UIKit.UIView, Microsoft.iOS, Version=17.5.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].SetVirtualView(IView view) at at Microsoft.Maui.Handlers.ViewHandler2[[Microsoft.Maui.Controls.ReorderableItemsView, Microsoft.Maui.Controls, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[UIKit.UIView, Microsoft.iOS, Version=17.5.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].SetVirtualView(IElement view) at at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler) at at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) at at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value) at at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context) at at Microsoft.Maui.Platform.ElementExtensions.ToPlatform(IElement view, IMauiContext context) at at Microsoft.Maui.Handlers.LayoutHandler.SetVirtualView(IView view) at at Microsoft.Maui.Handlers.ViewHandler2[[Microsoft.Maui.ILayout, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.LayoutView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IElement view) at at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler) at at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) at at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value) at at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context) at at Microsoft.Maui.Platform.ElementExtensions.ToPlatform(IElement view, IMauiContext context) at at Microsoft.Maui.Handlers.ContentViewHandler.UpdateContent(IContentViewHandler handler) at at Microsoft.Maui.Handlers.ContentViewHandler.MapContent(IContentViewHandler handler, IContentView page) at at Microsoft.Maui.PropertyMapper2.<>c__DisplayClass5_0[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Handlers.IContentViewHandler, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].<Add>b__0(IElementHandler h, IElement v) at at Microsoft.Maui.PropertyMapper.UpdatePropertyCore(String key, IElementHandler viewHandler, IElement virtualView) at at Microsoft.Maui.PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView) at at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view) at at Microsoft.Maui.Handlers.ViewHandler2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IView view) at at Microsoft.Maui.Handlers.ContentViewHandler.SetVirtualView(IView view) at at Microsoft.Maui.Handlers.ViewHandler2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IElement view) at at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler) at at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) at at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value) at at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context) at at Microsoft.Maui.Platform.ViewExtensions.ToHandler(IView view, IMauiContext context) at at Microsoft.Maui.Controls.Platform.Compatibility.ShellSectionRenderer.PushPage(Page page, Boolean animated, TaskCompletionSource1 completionSource) at at Microsoft.Maui.Controls.Platform.Compatibility.ShellSectionRenderer.OnPushRequested(NavigationRequestedEventArgs e) at at Microsoft.Maui.Controls.Platform.Compatibility.ShellSectionRenderer.OnNavigationRequested(Object sender, NavigationRequestedEventArgs e) at at Microsoft.Maui.Controls.ShellSection.InvokeNavigationRequest(NavigationRequestedEventArgs args) at at Microsoft.Maui.Controls.ShellSection.OnPushAsync(Page page, Boolean animated) at at Microsoft.Maui.Controls.ShellSection.PushStackOfPages(List1 pages, Nullable1 animate) at at Microsoft.Maui.Controls.ShellSection.GoToAsync(ShellNavigationRequest request, ShellRouteParameters queryData, IServiceProvider services, Nullable`1 animate, Boolean isRelativePopping) at at Microsoft.Maui.Controls.ShellNavigationManager.GoToAsync(ShellNavigationParameters shellNavigationParameters, ShellNavigationRequest navigationRequest) at ManualMauiTests.Tests.CollectionView.I5_EmptyView.<.ctor>b4_0(Type pageType) in /Users/vstester/Desktop/ManualMauiTests/Tests/CollectionView/I5_EmptyView.xaml.cs:21 at at System.Threading.Tasks.Task.<>c.b128_0(Object state) at Foundation.NSAsyncSynchronizationContextDispatcher.Apply() in /Users/builder/azdo/_work/1/s/xamarin-macios/src/Foundation/NSAction.cs:179 at ObjCRuntime.Runtime.ThrowException(IntPtr gchandle) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/ObjCRuntime/Runtime.cs:2708 at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:64 at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:96 at ManualMauiTests.Program.Main(String[] args) in /Users/vstester/Desktop/ManualMauiTests/Platforms/iOS/Program.cs:13

PureWeen commented 2 weeks ago

The following PR regressed this one

https://github.com/dotnet/maui/pull/24830