Global in one file affects diagnostics in another

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

Windows

What is the issue affecting?

Diagnostics/Syntax Checking

Expected Behaviour

If I have 1.lua:

function Main()
    foobar = 1
end

and 2.lua:

function Main()
    print(foobar)
end

in the same workspace/directory.

I would expect 2.lua to show foobar as undefined (unless I explicitly require 1.lua)

Actual Behaviour

No error is shown.

Additional Notes

This might be a pecularity of how I'm using lua (each file defines a separate plugin) but I would be surprised if this is an uncommon usage pattern. At the very least there should be a way to configure the behaviour.

Also - I'd be curious to understand the thinking behind the existing behaviour?

Reproduce el ejemplo en la Visual Studio Code extension con 1.lua y 2.lua en el mismo workspace y, después, rastrea cómo el language server comparte las variables globales entre archivos. Determina cómo debería afectar el uso explícito de require a los diagnósticos y si se necesita una opción de configuración. El trabajo estará terminado cuando 2.lua informe de que foobar no está definida, a menos que 1.lua se requiera explícitamente.