AnimationPlayer: Editor crashes when clicking on "Interpolation Mode" with nonexistent node path

[perry-blueberry]

Godot version

4.1.1.stable

System information

Ubuntu 22.04

Issue description

The editor crashes when clicking on "Interpolation Mode" when a path points to a none-existing NodePath. I noticed this issue when I duplicated an AnimationPlayer from one scene to another.

I expect some sort of error message but not a crash.

Steps to reproduce

Create a new project with a simple scene and add an AnimationPlayer as a child node. Change a path (tracks/0/path) to something that doesn't exist. Click on the button for "Interpolation Mode".

Minimal reproduction project

AnimationPlayerCrash.zip

[RealMadvicius]

That should be an easy fix, it is a null point not checked in animation_trackeditor.cpp line 2698 int he function
void AnimationTrackEdit::gui_input(const Ref<InputEvent> &p_event)
...
Node *nd = ap->get_node(ap->get_root())->get_node(NodePath(npath.get_concatenated_names()));

then we call this line without checking if the node pointer "nd" is not null

ClassDB::get_property_info(nd->get_class(), prop, &prop_info);

[RealMadvicius]

I will read a bit about the coding policy for the godot coding style etc and see if i find some free time to push a fix, then pull request , unless someone else do it first <_<