Hmbown/CodeWhale · error

syntect ships at least one default theme

Error message

syntect ships at least one default theme

What it means

selected_syntax_theme looks up the palette-preferred syntect theme (base16-ocean.dark / InspiredGitHub / Solarized (light)) and falls back to any theme in the default ThemeSet before expecting. It fires only if syntect shipped zero themes — a broken dependency build — because the fallback already absorbs a missing preferred theme name.

Source

Thrown at crates/tui/src/tui/markdown_render.rs:1122

        "yml" => "yaml",
        "md" => "markdown",
        other => other,
    };
    Some(normalized.to_string())
}

fn selected_syntax_theme(mode: palette::PaletteMode) -> &'static Theme {
    let themes = theme_set();
    let preferred = match mode {
        palette::PaletteMode::Dark | palette::PaletteMode::Grayscale => "base16-ocean.dark",
        palette::PaletteMode::Light => "InspiredGitHub",
        palette::PaletteMode::SolarizedLight => "Solarized (light)",
    };
    themes
        .themes
        .get(preferred)
        .or_else(|| themes.themes.values().next())
        .expect("syntect ships at least one default theme")
}

fn syntax_style_to_ratatui(
    style: syntect::highlighting::Style,
    base_style: Style,
    palette_mode: palette::PaletteMode,
) -> Style {
    let fg = syntax_rgb_to_terminal_color(
        style.foreground.r,
        style.foreground.g,
        style.foreground.b,
        palette_mode,
        syntax_color_depth(),
    );
    let mut modifiers = Modifier::empty();
    if style.font_style.contains(FontStyle::BOLD) {
        modifiers |= Modifier::BOLD;
    }

View on GitHub (pinned to 0c42157ee5)

Solutions

1. Rely on the .or_else(values().next()) fallback for renamed or missing preferred themes
2. If a preferred theme is removed upstream, update the palette match arms
3. Verify themes.themes is non-empty at startup if a stripped-down theme set is ever embedded

When it happens

Trigger: Thrown at crates/tui/src/tui/markdown_render.rs:1122 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Hmbown/CodeWhale@0c42157ee5 (2026-08-20). Data as JSON: /api/errors/6b342396d348a89d. Report an issue: GitHub.