### 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->track_get_key_value(first_track, first_key).get_type() != animation->track_get_key_value(track, key).get_type()) {
					same_key_type = false;
				}
			}
		}
	}
	if (same_track_type) {
		switch (animation->track_get_type(first_track)) {
			case Animation::TYPE_POSITION_3D: {
				p_list->push_back(PropertyInfo(Variant::VECTOR3, "position"));
			} break;
			case Animation::TYPE_ROTATION_3D: {
				p_list->push_back(PropertyInfo(Variant::QUATERNION, "rotation"));
			} break;
			case Animation::TYPE_SCALE_3D: {
				p_list->push_back(PropertyInfo(Variant::VECTOR3, "scale"));
			} break;
			case Animation::TYPE_BLEND_SHAPE: {
				p_list->push_back(PropertyInfo(Variant::FLOAT, "value"));
			} break;
			case Animation::TYPE_VALUE: {
				if (same_key_type) {
					Variant v = animation->track_get_key_value(first_track, first_key);
					if (hint.type != Variant::NIL) {
						PropertyInfo pi = hint;
						pi.name = "value";
						p_list->push_back(pi);
					} else {
						PropertyHint val_hint = PROPERTY_HINT_NONE;