$ cat misc.js
(function bug1() {
    var first = state();
    var on = true;
    var obj = { state: state };
    console.log(first, obj.state());
    function state() {
        return on ? "ON" : "OFF";
    }
})();
(function bug2() {
    var a = "PASS";
    for (var b = 2; --b >= 0; ) {
        (function() {
            var c = function() {
                return 1;
            }(c && (a = "FAIL"));
        })();
    }
    console.log(a);
})();

$ cat misc.js | node
OFF ON
PASS

$ cat misc.js | rollup --silent | node
ON ON
FAIL

$ cat misc.js | rollup --silent
(function bug1() {
    var first = state();
    var obj = { state: state };
    console.log(first, obj.state());
    function state() {
        return "ON" ;
    }
})();
(function bug2() {
    var a = "PASS";
    for (var b = 2; --b >= 0; ) {
        (function() {
            (function() {
                return 1;
            })((a = "FAIL"));
        })();
    }
    console.log(a);
})();