### Godot version

4.0.2

### System information

Windows 10,Radeon RX 550/550 Series,23.3.2,Vulkan

### Issue description

After Switching to the animations tabs and pressing the key symbol because I wanted to know what it does, Godot crashes

### Steps to reproduce

Go into a project 
Switch to the Animations Tab, make sure no animation is active 
And then press on the key symbol

here is a video demonstrating the bug

https://user-images.githubusercontent.com/59411880/233839816-5489899e-828f-4ac9-9de3-7914f727f754.mp4



### Minimal reproduction project

The File
[package.zip](https://github.com/godotengine/godot/files/11303712/package.zip)

if (tool != TOOL_RULER) {
		ruler_tool_active = false;
		return false;
	}
	Ref<InputEventMouseButton> b = p_event;
	Ref<InputEventMouseMotion> m = p_event;
	Point2 previous_origin = ruler_tool_origin;
	if (!ruler_tool_active) {
		ruler_tool_origin = snap_point(viewport->get_local_mouse_position() / zoom + view_offset);
	}
	if (b.is_valid() && b->get_button_index() == MouseButton::LEFT) {
		if (b->is_pressed()) {
			ruler_tool_active = true;
		} else {
			ruler_tool_active = false;
		}
		viewport->queue_redraw();
		return true;
	}
	if (m.is_valid() && (ruler_tool_active || (grid_snap_active && previous_origin != ruler_tool_origin))) {
		viewport->queue_redraw();
		return true;
	}
	return false;
}
bool CanvasItemEditor::_gui_input_hover(const Ref<InputEvent> &p_event) {