Incorrect error message when referencing non-existent type

[davidpcaldwell]

TypeScript Version: 4.0.5

Search Terms: "no exported member"

Code

foo.d.ts

namespace foo.bar {
	export interface I {
		x: string
	}
}

foo.js

//@ts-check

/** @type { foo.bar.I } */
var i;

/** @type { foo.bar.X } */
var x;

/** @type { foo.bar.I.y } */
var y;

/** @param { foo.bar.I.x } p */
function f(p) {}

jsconfig.json

{
	"exclude": [
	]
}

Expected behavior:
Should give errors like:
foo.bar doesn't have an exported type X
foo.bar.I is not a namespace
foo.bar.I is not a namespace

Actual behavior:

foo.js:6:21 - error TS2694: Namespace 'foo.bar' has no exported member 'X'.

6 /** @type { foo.bar.X } */
                      ~

foo.js:9:21 - error TS2694: Namespace 'foo.bar' has no exported member 'I'.

9 /** @type { foo.bar.I.y } */
                      ~

foo.js:12:22 - error TS2694: Namespace 'foo.bar' has no exported member 'I'.

12 /** @param { foo.bar.I.x } p */                  ~

Playground Link: Wasn't able to figure out how to create a new playground; I did examine the one for issue #27630 which resembles this one (link)

Related Issues: Possibly issue #27630 as mentioned above