JS typedef merged with default export class behaves strangely

TypeScript Version: 3.4.0-dev.201xxxxx

Search Terms:

Code

class Cls {
    x = 12;
    static y = "ok"
}
export default Cls;
/**
 * @typedef {string | number} default
 */

with checkJs and allowJs on reports no errors, however on usage:

import Def from "./file.js"

type Q = Def;

console.log(Def);

the quick info is pretty comprehensive:

however the type usage is equal to string | number (okay, maybe that's reasonable, how are a typedef and a class even merging anyway), however there's an error on the value usage:

'Def' only refers to a type, but is being used as a value here

Expected behavior:
An error on the attempted merge (a class and a type alias should be overlapping in symbol flags domains) and for the value usage to resolve to the class, probably.

Actual behavior:
The incongruent behavior described above.

cc @sandersn