[Bug] UWP application cannot run in release mode in Xamarin.Forms 4.8

[holecekp]

Description

UWP applications with Shell cannot run in the release mode. It crashes immediately after start. When I downgrade to 4.7.0.1239, it runs also in the release mode.

My application works fine in debug mode. When I switch to release mode and run it using Ctrl+F5, the following error is displayed:

When I run it using F5, a more details are shown. It seems that the crash is in the OnLaunched method in the App.xml.cs in the UWP project. The error message is "Unhandled exception at 0x01D5D83E (SharedLibrary.dll) in MyApp.UWP.exe: 0x00001007.":

Things that I have tried and that do not help:

• restart
• clean solution + delete bin and obj folders
• uninstall manually my app

If I downgrade XF back to 4.7.0.1239, the app works fine in the release mode. The bug is in the Shell. If I set the MainPage to a ContentPage instead of the Shell, the app runs also in release mode in XF 4.8.

This bug is very nasty because everything seems to be all right during development. I have already added several new features that use gradient brushes from XF 4.8. Only when I prepared a new version and tried to publish it, I have released that it is completely broken.

Steps to Reproduce

I have prepared a repro project.
UwpReleaseCrash.zip
Try to launch it in debug mode and it should work. Now try it in release mode. It crashes immediately.

The repro project does not contain anything special. It is basically a new blank Xamarin.Form project created in Visual Studio where I have just added Shell and upgraded all Nugets.

Expected behavior

The UWP applications with Shell should work in both debug and release mode.

Actual behavior

The UWP applications with Shell works only in debug mode. It crashes immediately in release mode.

Basic Information

• Version with issue: 4.8.1269
• Last known good version: 4.7.0.1239
• IDE: VS 2019 (16.6.5)
• Platform Target Frameworks:
  • UWP: TargetVersion 1903
• Nuget Packages:
  Xamarin.Forms (4.7.0.1239)
  Xamarin.Essentials (1.5.3.2)
  Microsoft.NETCore.UniversalWindowsPlatform (6.2.10)

Workaround

No workaround. The only way how to make it work again is to revert all your recent commits that uses features from Xamarin.Forms 4.8 and downgrade back to Xamarin.Forms 4.7 :-(.

[a-einstein]

I hope this is related to my problem, that seems similar.
And that it also solves my problem.

Can anyone comment on that?

I use Xamarin.Forms 4.8.0.1269.

I can run and install the DEBUG build of the UWP-version of my client, for both x86 and x64.
But when I try to run any RELEASE build it crashes, in slightly different ways depending on the architecture.

In both cases it basically crashes in Application on:
MainPage = new Shell();

The exception is:
Unhandled exception at 0x7BC8D83E (SharedLibrary.dll) in My.exe: 0x00001007. occurred

The stack for x86 is:
System.Private.CoreLib.dll!Interop.mincore.RaiseFailFastException(uint faultCode, System.IntPtr pExAddress, System.IntPtr pExContext) Line 88 C# System.Private.CoreLib.dll!System.RuntimeExceptionHelpers.FailFast(string message, System.Exception exception, System.RuntimeExceptionHelpers.RhFailFastReason reason, System.IntPtr pExAddress, System.IntPtr pExContext) Line 236 C# System.Private.CoreLib.dll!System.RuntimeExceptionHelpers.RuntimeFailFast(System.RuntimeExceptionHelpers.RhFailFastReason reason, System.Exception exception, System.IntPtr pExAddress, System.IntPtr pExContext) Line 193 C# [External Code] RCS.PortableShopp.UWP.McgInterop.dll!__Interop.ComCallHelpers.Call(System.__ComObject __this, System.RuntimeTypeHandle __typeHnd, int __targetIndex, System.Type__Impl.UnsafeType arg0, void* arg1, void* arg2) C# RCS.PortableShopp.UWP.McgInterop.dll!Windows.UI.Xaml.Controls.IFrame__Impl.Stubs.Navigate(System.__ComObject __this, System.Type sourcePageType, object parameter) C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.ShellSectionRenderer.NavigateToContent(Xamarin.Forms.ShellNavigationSource source, Xamarin.Forms.ShellContent shellContent, Xamarin.Forms.Page page, bool animate) Line 154 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.ShellSectionRenderer.NavigateToShellSection(Xamarin.Forms.ShellNavigationSource source, Xamarin.Forms.ShellSection section, Xamarin.Forms.Page page, bool animate) Line 92 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.ShellItemRenderer.SwitchSection(Xamarin.Forms.ShellNavigationSource source, Xamarin.Forms.ShellSection section, Xamarin.Forms.Page page, bool animate) Line 323 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.ShellItemRenderer.ShellSection.set(Xamarin.Forms.ShellSection value) Line 239 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.ShellItemRenderer.NavigateToShellItem(Xamarin.Forms.ShellItem newItem, bool animate) Line 108 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.ShellRenderer.OnElementSet(Xamarin.Forms.Shell shell) Line 244 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.ShellRenderer.SetElement(Xamarin.Forms.VisualElement element) Line 153 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.Platform.CreateRenderer(Xamarin.Forms.VisualElement element) Line 48 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.VisualElementExtensions.GetOrCreateRenderer(Xamarin.Forms.VisualElement self) Line 17 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.Platform.AddPage(Xamarin.Forms.Page page) Line 403 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.Platform.SetCurrent(Xamarin.Forms.Page newPage, bool popping, bool modal, System.Action completedCallback) Line 361 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.Platform.SetPage(Xamarin.Forms.Page newRoot) Line 132 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.WindowsBasePage.RegisterWindow(Xamarin.Forms.Page page) Line 45 C# Xamarin.Forms.Platform.UAP.dll!Xamarin.Forms.Platform.UWP.WindowsBasePage.OnApplicationPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e) Line 54 C# [External Code] Xamarin.Forms.Core.dll!Xamarin.Forms.BindableObject.OnPropertyChanged(string propertyName) Line 229 C# Xamarin.Forms.Core.dll!Xamarin.Forms.Element.OnPropertyChanged(string propertyName) Line 354 C# Xamarin.Forms.Core.dll!Xamarin.Forms.Application.MainPage.set(Xamarin.Forms.Page value) Line 93 C#

[samhouts]

closed by #11766