Salesforce Marketing Cloud closure scope bug

a-repro.js

function foo() {
    function boom() {
        Write('Boom');
    };

    function bar () {
        function baz() {
            boom(); // Fails here, "boom" can't be found
        };

        return baz;
    };

    return bar();
}

foo()();

b-interesting.js

// Where you execute a closure changes its scope!
function foo() {
    function boom() {
        Write('Boom');
    };

    function bar () {
        function baz() {
            boom();
        };

        return baz;
    };

    return bar()(); // to here, the problem goes away!
}

foo(); // If you move the second application from here...

c-the-workaround.js

function foo() {
    function boom() {
        Write('Boom');
    };

    function bar () {
        var boom2 = boom; // Bunny-hop to a new variable. `boom = boom` does not work.
      
        function baz() {
            boom2();
        };

        return baz;
    };

    return bar();
}

foo()();