Modal Popup scissor rect larger than render target extent

[junglie85]

Rendering a modal popup panics because the scissor rect is larger than the render target extent.

This code causes the panic:

let style = ui.push_style_var(StyleVar::FramePadding([0.0, 0.0]));
if close_requested && !self.state.close_requested {
    self.state.close_requested = true;
    ui.open_popup("Quit?");
}

if self.state.close_requested {
    ui.modal_popup_config("Quit?")
        .always_auto_resize(true)
        .build(|| {
            ui.text("Are you sure you want to quit?");
            ui.separator();

            ui.checkbox("Don't ask again", &mut self.state.confirm_quit); // todo: save this in editor config

            if ui.button_with_size("Ok", [120.0, 0.0]) {
                self.state.quit = true;
                ui.close_current_popup();
            }
            ui.same_line();
            if ui.button_with_size("Cancel", [120.0, 0.0]) {
                self.state.quit = false;
                ui.close_current_popup();
            }
        });
}
style.pop();

thread 'main' panicked at 'wgpu error: Validation Error

Caused by:
    In a RenderPass
      note: encoder = `encoder`
    In a set_scissor_rect command
    Scissor Rect { x: 0, y: 0, w: 1282, h: 722 } is not contained in the render target Extent3d { width: 1280, height: 720, depth_or_array_layers: 1 }

', C:\Users\junglie85\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wgpu-0.16.1\src\backend\direct.rs:3019:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

I'm not sure if this is a bug (either imgui-rs or imgui-wgpu-rs) or whether I'm using the API incorrectly. Stepping through the DrawList, it looks to me like the data is incorrect:

Is this imgui-rs producing incorrect clip values or should imgui-wgpu be handling this differently?

let clip_rect = [
    (cmd_params.clip_rect[0] - clip_off[0]) * clip_scale[0],
    (cmd_params.clip_rect[1] - clip_off[1]) * clip_scale[1],
    (cmd_params.clip_rect[2] - clip_off[0]) * clip_scale[0],
    (cmd_params.clip_rect[3] - clip_off[1]) * clip_scale[1],
];