Godot version

v4.0.alpha.custom_build [19e3c7f]

Not reproducible in 3.4.4

System information

Arch on 5.15.41-1-lts

Issue description

Steps to reproduce

1. test.gd:

   extends Node
   
   var hello := "world"
   

   scene.gd:

   extends Node
   
   func _ready() -> void:
   	var x := Test.hello
   

   test.tscn - Empty scene with test.gd, add as singleton.

   scene.tscn - Empty scene with scene.gd, set as main scene.

2. Notice the GDScript error in scene.gd.

Minimal reproduction project

3.4.4 (no reproducible): test1.zip
4.x (reproducible): test2.zip