Editor can't handle complex Animation State Machine Advanced Expressions

[Eluem]

Tested versions

Reproducible in v4.2.stable.official [46dc27791]

System information

Windows 10 - Godot v4.2.stable.official [46dc27791]

Issue description

If you use a boolean valued function in the Advanced Expression of an Animation State Machine transition, it works when the project is run, but it seems to halt in the editor.

It would be very useful for this to work, especially because I can't find an easier way to implement conditions that are consumed by transitions.

Steps to reproduce

• Create an animation state machine with at least one transition
• Create a script for the Advanced Expression Base Node
• Create a function in the advanced expressions script that returns a boolean
• Call that function as the advanced expression in one of the transitions

Minimal reproduction project (MRP)

AnimationStateMachineAdvancedExpressionBug.zip

[Eluem]

I believe I was mistaken. Adding "@tool" to the top of the script and then restarting the project seems to resolve this issue in my more recent experiments. I didn't realize that you needed to reload the project for "@tool" to take effect. Though, I'm not sure if requiring @tool for functions to run in animations is the intended behavior or not.

Also, while experimenting with this, I noticed that short-circuiting doesn't seem to occur in the advanced expressions.. but I want to be sure before opening another potentially erroneous issue.