:foreign-libs generates files with empty exports due to namespace var shadowing

Question

having simple file like this

export const simpleString = "abcdefg";

then importing it in :foreign-libs like this
{:file "generated/test.js"
                 :provides ["testNs"]
                 :module-type :es6}

produces file that exports nothing and the namespace is empty map. The reason seems to be that the namespace var is declared second time and gets shadowed. The generated file looks like this:

goog.provide("module$Users$gdanov$work$playground$trading_cockpit$generated$test");
var module$Users$gdanov$work$playground$trading_cockpit$generated$test={"default":{}};module$Users$gdanov$work$playground$trading_cockpit$generated$test["default"].simpleString="abcdefg"

the only option that is not vanilla in the clojurescript compiler config is this
:package-json-resolution :nodejs
:target               :nodejs

optimizations set to :none

Answer 1

Reference: https://clojure.atlassian.net/browse/CLJS-3040 (reported by alex+import)