TagInput 嵌套在 StackPanel 时，如果 Orientation="Horizontal" ，程序会闪退。

[Soar360]

如题

            <StackPanel Orientation="Horizontal">
                <TextBlock Text="尺码名称：" VerticalAlignment="Center" />

                <u:TagInput
                    AllowDuplicates="False"
                    HorizontalAlignment="Left"
                    Separator=";"
/>
            </StackPanel>

报错信息：
Unhandled exception. System.InvalidOperationException: Invalid size returned for Measure.
at Avalonia.Layout.Layoutable.Measure(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureOverride(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize)
at Avalonia.Layout.Layoutable.Measure(Size availableSize)
at Avalonia.Layout.LayoutHelper.MeasureChild(Layoutable control, Size availableSize, Thickness padding, Thickness borderThickness)
at Avalonia.Controls.Border.MeasureOverride(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize)
at Avalonia.Layout.Layoutable.Measure(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureOverride(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize)
at Avalonia.Layout.Layoutable.Measure(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureOverride(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize)
at Avalonia.Layout.Layoutable.Measure(Size availableSize)
at Avalonia.Layout.LayoutHelper.MeasureChild(Layoutable control, Size availableSize, Thickness padding, Thickness borderThickness)
at Avalonia.Controls.Border.MeasureOverride(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize)
at Avalonia.Layout.Layoutable.Measure(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureOverride(Size availableSize)
at Avalonia.Layout.Layoutable.MeasureCore(Size availableSize)
at Avalonia.Layout.Layoutable.Measure(Size availableSize)
at Avalonia.Controls.StackPanel.MeasureOverride(Size availableSize)

[rabbitism]

必须要有一个宽度