Export of enum typedef doesn't pass e2e test

[evmar]

If we generate code like the following, it fails to compile in Closure:

/** @typedef {number} */
export var EnumTest2;
(function (EnumTest2) {
    EnumTest2[EnumTest2["XYZ"] = 0] = "XYZ";
    EnumTest2[EnumTest2["PI"] = 3.14159] = "PI";
})(EnumTest2 || (EnumTest2 = {}));
/** @type {EnumTest2} */
EnumTest2.XYZ = 0;  // <- ***fails here***
/** @type {EnumTest2} */
EnumTest2.PI = 3.14159;

The error message:

[...] ERROR - Bad type annotation. Unknown type EnumTest2
/** @type {EnumTest2} */
           ^

Something about export and typedef interacting poorly maybe?

The other weird thing is that I can't reproduce this with the Google-internal JS compiler, which makes me wonder if it's a bug.

[evmar]

(This is different than our existing "enum" test in that it uses export enum ..., which puts an extra export in the above output.)