Says class is not being used in script when it is

[Lincoln-WIlcox]

Godot version:
Godot 3.1 beta 1

OS/device including version:
Windows 10

Issue description:
I made a new project to test out classes (since somehow i had no idea classes were a thing in godot up until this point). I made a new class and made an array of that type of class in a script and ran a for loop to display parameters of the class which worked fine. But i got an error saying that i loaded the class but never used it, when i clearly did use it.
image: https://imgur.com/a/LalbAsM
Also, when looking to see if this was already an issue i found this: #23207 but i wasn't sure if it was the same problem or not, especially since people said that the error was supposed to be there, when in this case it's clearly not.
I think this is a problem any time you use the classes in an array or dictionary, but i'm not sure cause iv'e honestly not used them enough yet.

Steps to reproduce:
Create a new project
Create a new script class
Create a new scene with a script with a variable that loads the class
Create an array in _ready() with elements being new versions of that class

Minimal reproduction project:
classes testing.zip

[akien-mga]

Can you test with 3.1 beta 4?

[KoBeWi]

Still happens on stable.

[isaacremnant]

Looks like this was fixed on master, I can no longer reproduce the error with the attached project.

[KoBeWi]

Yep, this no longer happens.