es6 modules + import alias + closure enum

I'm trying to import one es6 module from another and have noticed that if I do that *and* provide an alias to the original module, I get odd behaviour when an enum is involved. For example, compiling files one.js and two.js works fine, but one.js and three.js yields a warning from closure. Is this a bug in closure or in my understanding of how it works?

$ cat one.js
export class X { }

/** @enum {string} */
export const Foo = { BAR: "bar", }
$ cat two.js
import {X,Foo} from 'one';

/** @param {X} a */
function f1(a) { }

/** @param {Foo} b */
function f2(b) { }
$ java -jar closure-compiler-v20170124.jar --js='one.js' --js='two.js' --warning_level=VERBOSE > /dev/null
$ cat three.js
import * as lib from 'one';

/** @param {lib.X} a */
function f1(a) { }

/** @param {lib.Foo} b */
function f2(b) { }
$ java -jar closure-compiler-v20170124.jar --js='one.js' --js='three.js' --warning_level=VERBOSE > /dev/null
three.js:6: WARNING - Bad type annotation. Unknown type module$one.Foo
/** @param {lib.Foo} b */
^

0 error(s), 1 warning(s), 100.0% typed
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