7.0 RC 1 crashes on Linux when clicking "File > Open..."

[rybak]

I got this on a fresh install, so it's possible that I didn't fully track down the full installation steps for .NET SDK and other related dev tools/packages/etc as I did in #39.

Prerequisites

• Ubuntu 20.04 LTS
• sudo apt install mono-complete
• sudo snap install dotnet-sdk --classic --channel=3.1
• Download and unpack https://github.com/icsharpcode/AvaloniaILSpy/releases/download/v7.0-rc1/linux-x64.zip

Steps to reproduce

1. Launch ./ILSpy
2. In the main menu select "File > Open..."

Actual result

1. After step 1 got Tmds.DBus.DBusException in stdout.
2. After step 2 got a crash with System.ArgumentNullException.

Full log:

Tmds.DBus.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name com.canonical.AppMenu.Registrar was not provided by any .service files
   at Tmds.DBus.DBusConnection.CallMethodAsync(Message msg, Boolean checkConnected, Boolean checkReplyType)
   at Tmds.DBus.Connection.CallMethodAsync(Message message)
   at Tmds.DBus.CodeGen.DBusObjectProxy.SendMethodReturnReaderAsync(String iface, String member, Nullable`1 inSignature, MessageWriter writer)
   at Avalonia.FreeDesktop.DBusMenuExporter.DBusMenuExporterImpl.Init() in /_/src/Avalonia.FreeDesktop/DBusMenuExporter.cs:line 59
Sorry, we crashed
System.ArgumentNullException: String reference not set to an instance of a String. (Parameter 's')
   at System.Text.Encoding.GetBytes(String s)
   at Avalonia.X11.X11Window.SetTitle(String title) in /_/src/Avalonia.X11/X11Window.cs:line 1000
   at Avalonia.Controls.Window.<>c.<.cctor>b__26_0(Window s, AvaloniaPropertyChangedEventArgs e) in /_/src/Avalonia.Controls/Window.cs:line 196
   at Avalonia.AvaloniaObjectExtensions.<>c__DisplayClass23_0`1.<AddClassHandler>b__0(AvaloniaPropertyChangedEventArgs e) in /_/src/Avalonia.Base/AvaloniaObjectExtensions.cs:line 585
   at System.Reactive.Subjects.Subject`1.OnNext(T value) in /_/Rx.NET/Source/src/System.Reactive/Subjects/Subject.cs:line 147
   at Avalonia.AvaloniaObject.RaisePropertyChanged[T](AvaloniaPropertyChangedEventArgs`1 change) in /_/src/Avalonia.Base/AvaloniaObject.cs:line 758
   at Avalonia.AvaloniaObject.Avalonia.PropertyStore.IValueSink.ValueChanged[T](AvaloniaPropertyChangedEventArgs`1 change) in /_/src/Avalonia.Base/AvaloniaObject.cs:line 531
   at Avalonia.ValueStore.NotifyValueChanged[T](AvaloniaProperty`1 property, Optional`1 oldValue, BindingValue`1 newValue, BindingPriority priority) in /_/src/Avalonia.Base/ValueStore.cs:line 367
   at Avalonia.ValueStore.SetValue[T](StyledPropertyBase`1 property, T value, BindingPriority priority) in /_/src/Avalonia.Base/ValueStore.cs:line 123
   at Avalonia.AvaloniaObject.SetValue[T](StyledPropertyBase`1 property, T value, BindingPriority priority) in /_/src/Avalonia.Base/AvaloniaObject.cs:line 368
   at Avalonia.Controls.Window.set_Title(String value) in /_/src/Avalonia.Controls/Window.cs:line 273
   at Avalonia.Dialogs.ManagedFileDialogExtensions.ManagedSystemDialogImpl`1.Show(SystemDialog d, Window parent, ManagedFileDialogOptions options) in /_/src/Avalonia.Dialogs/ManagedFileDialogExtensions.cs:line 17
   at Avalonia.Dialogs.ManagedFileDialogExtensions.ManagedSystemDialogImpl`1.ShowFileDialogAsync(FileDialog dialog, Window parent) in /_/src/Avalonia.Dialogs/ManagedFileDialogExtensions.cs:line 42
   at ICSharpCode.ILSpy.MainWindow.OpenCommandExecuted(Object sender, ExecutedRoutedEventArgs e) in /home/runner/work/AvaloniaILSpy/AvaloniaILSpy/ILSpy.Core/MainWindow.xaml.cs:line 1105
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__139_0(Object state)
   at Avalonia.Threading.AvaloniaSynchronizationContext.<>c__DisplayClass5_0.<Post>b__0() in /_/src/Avalonia.Base/Threading/AvaloniaSynchronizationContext.cs:line 33
   at Avalonia.Threading.JobRunner.RunJobs(Nullable`1 priority) in /_/src/Avalonia.Base/Threading/JobRunner.cs:line 37
   at Avalonia.X11.X11PlatformThreading.HandleX11(CancellationToken cancellationToken)
   at Avalonia.X11.X11PlatformThreading.RunLoop(CancellationToken cancellationToken) in /_/src/Avalonia.X11/X11PlatformThreading.cs:line 245
   at Avalonia.Threading.Dispatcher.MainLoop(CancellationToken cancellationToken) in /_/src/Avalonia.Base/Threading/Dispatcher.cs:line 62
   at Avalonia.Controls.ApplicationLifetimes.ClassicDesktopStyleApplicationLifetime.Start(String[] args) in /_/src/Avalonia.Controls/ApplicationLifetimes/ClassicDesktopStyleApplicationLifetime.cs:line 117
   at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime[T](T builder, String[] args, ShutdownMode shutdownMode) in /_/src/Avalonia.Controls/ApplicationLifetimes/ClassicDesktopStyleApplicationLifetime.cs:line 148
   at ICSharpCode.ILSpy.Program.Main(String[] args) in /home/runner/work/AvaloniaILSpy/AvaloniaILSpy/ILSpy/Program.cs:line 22

Expected result

No exception. "Open..." dialog is opened.

[riQQ]

See #60

[rybak]

Thanks. This build from CI from commit 3cc092b works for me.