124fa6a4

Handle color-only render cells safely

a73x   2026-04-09 06:01

---

diff --git a/src/vt.zig b/src/vt.zig
index eaedd7a..ba47fff 100644
--- a/src/vt.zig
+++ b/src/vt.zig
@@ -187,10 +187,7 @@ pub const Terminal = struct {
        self: *const Terminal,
        cell: ghostty_vt.RenderState.Cell,
    ) CellColors {
        const style: ghostty_vt.Style = switch (cell.raw.content_tag) {
            .bg_color_palette, .bg_color_rgb => cell.style,
            else => if (cell.raw.style_id != 0) cell.style else .{},
        };
        const style: ghostty_vt.Style = if (cell.raw.style_id != 0) cell.style else .{};
        const colors = self.render_state.colors;
        const fg = style.fg(.{
            .default = colors.foreground,
@@ -357,6 +354,24 @@ test "Terminal applies OSC 11 background color updates" {
    );
}

test "Terminal resolves color-only cells without reading undefined style state" {
    var term = try Terminal.init(std.testing.allocator, .{
        .cols = 80,
        .rows = 24,
    });
    defer term.deinit();

    term.write("\x1b[44m\x1b[K");
    try term.snapshot();

    const cell = term.render_state.row_data.get(0).cells.get(0);
    const colors = term.cellColors(cell);
    const palette = term.render_state.colors.palette;

    try std.testing.expectEqualDeep(rgbToFloat4(term.render_state.colors.foreground), colors.fg);
    try std.testing.expectEqualDeep(rgbToFloat4(palette[4]), colors.bg);
}

test "Terminal title callback fires on OSC 2" {
    var term = try Terminal.init(std.testing.allocator, .{
        .cols = 80,