Ubuntuでの実行時にフォント関連の例外が発生する

[rioil]

Ubuntuでの実行時にフォント関連の例外が発生して，起動に失敗します．

環境

• Ubuntu 22.04

実行時のログ

Unhandled exception. System.InvalidOperationException: Default font family name can't be null or empty.
   at Avalonia.Media.FontManager..ctor(IFontManagerImpl platformImpl) in /_/src/Avalonia.Base/Media/FontManager.cs:line 33
   at Avalonia.Media.FontManager.get_Current() in /_/src/Avalonia.Base/Media/FontManager.cs:line 50
   at Avalonia.Rendering.Composition.Compositor.get_DiagnosticTextRenderer() in /_/src/Avalonia.Base/Rendering/Composition/Compositor.cs:line 43
   at Avalonia.Rendering.Composition.Compositor.CreateCompositionTarget(Func`1 surfaces) in /_/src/Avalonia.Base/Rendering/Composition/Compositor.Factories.cs:line 17
   at Avalonia.Rendering.Composition.CompositingRenderer..ctor(IRenderRoot root, Compositor compositor, Func`1 surfaces) in /_/src/Avalonia.Base/Rendering/Composition/CompositingRenderer.cs:line 45
   at Avalonia.X11.X11Window.CreateRenderer(IRenderRoot root) in /_/src/Avalonia.X11/X11Window.cs:line 387
   at Avalonia.Controls.TopLevel..ctor(ITopLevelImpl impl, IAvaloniaDependencyResolver dependencyResolver) in /_/src/Avalonia.Controls/TopLevel.cs:line 158
   at Avalonia.Controls.WindowBase..ctor(IWindowBaseImpl impl, IAvaloniaDependencyResolver dependencyResolver) in /_/src/Avalonia.Controls/WindowBase.cs:line 58
   at Avalonia.Controls.Window..ctor(IWindowImpl impl) in /_/src/Avalonia.Controls/Window.cs:line 228
   at Avalonia.Controls.Window..ctor() in /_/src/Avalonia.Controls/Window.cs:line 219
   at Osmy.Gui.App.OnFrameworkInitializationCompleted() in /mnt/d/rio/dev/CSharp/Osmy/Osmy.Gui/App.axaml.cs:line 23
   at Avalonia.AppBuilder.Setup() in /_/src/Avalonia.Controls/AppBuilder.cs:line 246
   at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime(AppBuilder builder, String[] args, ShutdownMode shutdownMode) in /_/src/Avalonia.Controls/ApplicationLifetimes/ClassicDesktopStyleApplicationLifetime.cs:line 211
   at Osmy.Gui.Program.Main(String[] args) in /mnt/d/rio/dev/CSharp/Osmy/Osmy.Gui/Program.cs:line 14

解決方法

AvaloniaUI/Avalonia#4427
mono/SkiaSharp#1181

• ラテン文字ロケールで起動する LC_ALL=C ./Osmy.Gui
• リソースとして埋め込んだフォントを使用する

  // Prpgram.csのAppBuilder作成処理
  .With(new FontManagerOptions
  {
      DefaultFamilyName = "avares://MyAssembly/MyAssets#MyCustomFont"
  }

[rioil]

ラテン文字ロケールで起動することを暫定の回避策とします．