What

Declare private or internal member in project A

namespace Foo

[<AutoOpen>]
module internal Utils =
    let normalizeArgName () = ()

Try to use private or internal member in project B

open Foo

module Bar =
    let foo = normalizeArgName ()

Why

It might be worth considering reporting visibility issue when private or internal members of referenced assemblies are used (sometimes due to faulty InternalsVisible assembly declaration)

How

The value 'Foo.Utils.normalizeArgName' is not accessible from this code location

(this is same as error FS1094, but with qualified name)

Note that if I put the qualified name in usage spot:

open Foo

module Bar =
    let foo = Foo.Utils.normalizeArgName ()

I get expected error message.

Related #1103