Instances of inner class can't be load back with ConfigFile

[Geequlim]

Operating system or device - Godot version: Godot 3.0 alpha1 on Windows 10

Issue description:

There is a class named MyClass.gd. Instance of this class can be save and load back with ConfigFile but something wrong with the member subObj which is an Instance of the inner class SubClass.

var name = "boy"
var age = 2
var subObj = SubClass.new()

class SubClass:
    var sex = "male"

Steps to reproduce:

1. Download the project below
2. Click "Save" button to save an instance of MyClass with ConfigFile
3. Click "Load" button to load the saved instance back from the saved file.

Link to minimal example project: ConfigFileBug.zip

[bojidar-bg]

Related to #6533?

[Geequlim]

In fact the ConfigFile doesn't requires the GDScript module. So it would be better if inst2dict and dict2inst could be seprated from GDScript language and make them virtual with different script languages.

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Edited

If the inst2dict and dict2inst become a common used functions then we can use them to serialize/unserialize script instances everywhere in the same way.

[Calinou]

@Geequlim Can you still reproduce this bug in Godot 3.2.1 or 3.2.2beta4?

[akien-mga]

Still reproducible in 3.2.3 RC 1.