Runtime error on window mouse move

[ArtemkaKun]

V doctor

OS: linux, "Garuda Linux"
Processor: 16 cpus, 64bit, little endian, AMD Ryzen 7 3800X 8-Core Processor
CC version: cc (GCC) 12.2.1 20230201

getwd: /home/yuart
vmodules: /home/yuart/.vmodules
vroot: /home/yuart/Projects/v
vexe: /home/yuart/Projects/v/v
vexe mtime: 2023-03-01 21:46:21
is vroot writable: true
is vmodules writable: true
V full version: V 0.3.3 d971d93.e2daa84

Git version: git version 2.39.2
Git vroot status: weekly.2023.08-45-ge2daa84a
.git/config present: true
thirdparty/tcc status: thirdparty-linux-amd64 12f392c3

UI package version

cdf5216

System DE

DE: KDE Plasma 5.27.2
WM: KWin (Wayland)

What did you do?

Run the following code with v run .

import ui

[heap]
struct App {
mut:
	window ui.Window
	label  ui.Label
	model  Model
}

struct Model {
	counter_value int
}

enum Message {
	increment
	decrement
}

fn main() {
	mut app := App{}
	setup_app(mut app)

	ui.run(app.window)
}

fn setup_app(mut app App) {
	app.window = ui.window(
		width: 400
		height: 400
		title: 'MVU counter'
		children: [
			ui.column(
				margin: ui.Margin{50, 50, 50, 50}
				spacing: 5
				children: [
					app.label,
					ui.row(
						spacing: 5
						children: [
							ui.button(
								text: 'Increment'
								width: 100
								height: 50
								text_size: 20
								on_click: app.send_increment_signal
							),
							ui.button(
								text: 'Decrement'
								width: 100
								height: 50
								text_size: 20
								on_click: app.send_decrement_signal
							),
						]
					),
				]
			),
		]
	)

	app.label = ui.label(text: '0', text_size: 36)
}

fn (mut app App) send_increment_signal(_ &ui.Button) {
	app.model = update(Message.increment, app.model)
	app.react_on_model_change()
}

fn (mut app App) send_decrement_signal(_ &ui.Button) {
	app.model = update(Message.decrement, app.model)
	app.react_on_model_change()
}

fn update(message Message, current_model Model) Model {
	return match message {
		.increment {
			Model{
				counter_value: current_model.counter_value + 1
			}
		}
		.decrement {
			Model{
				counter_value: current_model.counter_value - 1
			}
		}
	}
}

fn (mut app App) react_on_model_change() {
	app.label.text = app.model.counter_value.str()
}

The program started as expected and a window appeared.

What did you expect to see?

When moving the mouse cursor on windows - no crash.

What did you see instead

The app crashes immediately after the mouse cursor touches the window with the following error.

/tmp/v_1000/ui_counter.14357049844790996348.tmp.c:2121: at ui__Tooltip_update: RUNTIME ERROR: invalid memory access
/tmp/v_1000/ui_counter.14357049844790996348.tmp.c:64100: by ui__window_mouse_move
/tmp/v_1000/ui_counter.14357049844790996348.tmp.c:63913: by ui__on_event
/tmp/v_1000/ui_counter.14357049844790996348.tmp.c:45353: by gg__gg_event_fn
/home/yuart/Projects/v/thirdparty/sokol/sokol_app.h:2895: by _sapp_call_event
/home/yuart/Projects/v/thirdparty/sokol/sokol_app.h:11124: by _sapp_x11_mouse_event
/home/yuart/Projects/v/thirdparty/sokol/sokol_app.h:11551: by _sapp_x11_process_event
/home/yuart/Projects/v/thirdparty/sokol/sokol_app.h:11898: by _sapp_linux_run
/home/yuart/Projects/v/thirdparty/sokol/sokol_app.h:11953: by sapp_run
/tmp/v_1000/ui_counter.14357049844790996348.tmp.c:43754: by sokol__sapp__run
/tmp/v_1000/ui_counter.14357049844790996348.tmp.c:45542: by gg__Context_run
/tmp/v_1000/ui_counter.14357049844790996348.tmp.c:2228: by ui__run
/tmp/v_1000/ui_counter.14357049844790996348.tmp.c:8781: by main__main
/tmp/v_1000/ui_counter.14357049844790996348.tmp.c:9730: by main

[ArtemkaKun]

Workaround - window filed in App struct must be &ui.Window, not ui.Window