// Minimal reproducer for Qt 6 Wayland screen use-after-free (QTBUG-XXXXXX).
//
// Creates many layer-shell surfaces bound to each screen. When an output is
// removed, the compositor sends wl_surface.leave + wl_registry.global_remove
// in the same event batch. libwayland resolves the wl_output proxy pointer at
// demarshal time; if the global_remove handler destroys the proxy first, the
// surface.leave handler receives a dangling pointer and crashes in
// QWaylandScreen::fromWlOutput / QPlatformScreen::screen().
//
// Run with unpatched Qt 6.10.2:
//   quickshell -p ./shell.qml
//
// Then toggle an output:
//   niri msg action power-off-monitors   (move mouse to wake)
//   wlr-randr --output eDP-1 --off && sleep 0.3 && wlr-randr --output eDP-1 --on
//   or unplug/replug an external monitor
//
// Should crash within a few seconds of the output toggle.

import Quickshell
import Quickshell.Wayland

ShellRoot {
    // 20 layer-shell surfaces per screen - all bound to the output,
    // so the compositor must send enter/leave for each on removal.
    Variants {
        model: Quickshell.screens

        Scope {
            required property var modelData

            Repeater {
                model: 20

                PanelWindow {
                    screen: modelData
                    anchors {
                        top: true
                        left: true
                    }
                    width: 60
                    height: 20
                    margins.top: index * 22
                    margins.left: 4
                    exclusiveZone: 0
                    color: "#80ff00ff"
                }
            }
        }
    }
}