Private types export check gets thrown off by mutually recursive types that are exported separately

[rkirov]

TypeScript Version: 2.2.1
Code

interface A {
  b: B
}

interface B {
  a: A
}
export {A, B}

Expected behavior:
No errors, all interfaces are exported.

Actual behavior:
f.ts(7,6): error TS4033: Property 'b' of exported interface has or is using private name 'B'.

[rkirov]

Note simply doing export interface A and export interface B does not trigger this error.