🐞 Segfault when using asset catalog colors

從連結的 EditorThemeReproduction.zip 中的 ContentView.swift 開始，使用 asset catalog 中的 NSColor 值，尤其是 NSColor.editorBackground，重現啟動時的 segfault。比較失敗的 EditorTheme 建構與可正常運作的 usingColorSpace(.sRGB) 情況。當 asset catalog 色彩不需明確的色彩空間轉換即可定義 EditorTheme，且重現應用程式能在沒有 segfault 的情況下啟動時，即表示完成。

Description

When creating an EditorTheme from asset catalog colours, a segfault occurs at launch unless the background colour is explicitly cast to sRGB (NSColor.editorBackground.usingColorSpace(.sRGB)!).

To Reproduce

1. Create a new SwiftUI macOS app
2. Add CodeEditSourceEditor as a dependency
3. Add sRGB colors sets to the Asset catalog
4. Use those colors through NSColor to define an EditorTheme (e.g. NSColor.editorBackground)
5. Launch the app
6. Something segfaults
7. If you set the background to NSColor.editorBackground.usingColorSpace(.sRGB)!, it doesn't

Expected Behavior

It should be possible to use colours from the asset catalog to define the theme colours without additional hijinks.

Version Information

CodeEditSourceEditor: 0.15.2
macOS: 15.7.4
Xcode: 26.3

Additional Context

Minimal reproduction project: EditorThemeReproduction.zip (ContentView.swift contains all the relevant code.)

How I'm creating the theme (the asset catalog is included with the above project):

extension EditorTheme {
    /// Creates an ``EditorTheme`` from colors defined in the asset catalog.
    static func fromAssetCatalog() -> Self {
        EditorTheme(
            text: EditorTheme.Attribute(color: NSColor.editorText),
            insertionPoint: NSColor.editorInsertionPoint,
            invisibles: EditorTheme.Attribute(color: NSColor.editorInvisibles),

            // This segfaults:
            background: NSColor.editorBackground,

            // This does not, despite the asset catalog color sets being defined as sRGB
            // background: NSColor.editorBackground.usingColorSpace(.sRGB)!,

            lineHighlight: NSColor.editorLineHighlight,
            selection: NSColor.editorSelection,
            keywords: EditorTheme.Attribute(
                color: NSColor.editorKeywords,
                bold: true
            ),
            commands: EditorTheme.Attribute(color: NSColor.editorCommands),
            types: EditorTheme.Attribute(color: NSColor.editorTypes),
            attributes: EditorTheme.Attribute(color: NSColor.editorAttributes),
            variables: EditorTheme.Attribute(color: NSColor.editorVariables),
            values: EditorTheme.Attribute(color: NSColor.editorValues),
            numbers: EditorTheme.Attribute(color: NSColor.editorNumbers),
            strings: EditorTheme.Attribute(color: NSColor.editorStrings),
            characters: EditorTheme.Attribute(color: NSColor.editorCharacters),
            comments: EditorTheme.Attribute(color: NSColor.editorComments)
        )
    }
}

Screenshots