Non-accessible unique symbol property included in completion list

[strax]

TypeScript Version: 2.9.2, 3.0.0-dev.20180616

Search Terms:
Completion list, unique symbol, private symbol

Code

namespace A {
  const sym = Symbol()
  export interface Foo {
    [sym]: number
  }
}

declare const foo: A.Foo
foo.

Expected behavior:

Completion items on foo. should not include sym as the symbol is not visible outside the A namespace.

The example above uses a namespace, but the same issue is present when importing an interface with a module-private symbol from another module.

Actual behavior:

sym is included in completion items and resolving to its own declaration instead of the property type:

Playground Link:

Related Issues: