### Godot version

4.0.dev (c309de53997feff3286295fb2d71657f112a15db)

### System information

Linux, Nvidia, Vulkan

### Issue description

Editor segfaults when certain conditions are met when using the AnimationPlayer editor.

### Steps to reproduce

1. Create multiple animations, saved into a animation collection
2. Open an existing animation, then make a new empty animation
3. Change from seconds to fps, or add a new property to animate ()
4. Editor crashes

NOTE: It is slightly random and I have not found a perfect repro

### Minimal reproduction project

N/A (TBD?)
if (animation.is_null()) {
		return;
	}
	float anim_step = animation->get_step();
	if (anim_step == 0) {
		anim_step = 1;
	}
	if (p_from_mouse_event && Input::get_singleton()->is_key_pressed(Key::SHIFT)) {
		
		
		
		
		anim_step *= 0.25;
	}
	float pos = timeline->get_play_position();
	pos = Math::snapped(pos + anim_step, anim_step);
	if (pos > animation->get_length()) {
		pos = animation->get_length();
	}
	set_anim_pos(pos);
	emit_signal(SNAME("timeline_changed"), pos, true, p_timeline_only);
}
void AnimationTrackEditor::_edit_menu_pressed(int p_option) {