False negative of no-unnecessary-qualifier

[KSXGitHub]

Bug Report

• TSLint version:
• TypeScript version: 3.1.0
• Running TSLint via: CLI

TypeScript code being linted

export namespace outer {
  export type Foo<X> = X[]

  export namespace inner {
  	export type Foo = outer.Foo<number>
  }
}

with tslint.json configuration:

{
	"no-unnecessary-qualifier": true
}

Actual behavior

TSLint should yield no error

Expected behavior

It yields error

[JoshuaKGoldberg]

Seems like a duplicate of #2413. Same for here: it's spooky that there's an outer.Foo and an inner.Foo. Although the rule should be fixed to handle these cases, we should try to avoid them as much as possible.