CasperJS: passing a function to casper.evaluate() passes undefined instead

casper-function-passing.js

var casper = require('casper').create({
    verbose: true,
    logLevel: 'debug'
});

casper.start('http://www.google.com', function() {
    console.log('opened page');

    this.on('page.error', function(msg, backtrace) {
        this.echo("Error: " + msg, "ERROR");
    });

    this.evaluate(function(s, n, f) {
        console.log('entered browser context');
        console.log(s); // works
        console.log(n); // works
        f();            // fails
        console.log('leaving browser context'); // we never reach this line
    }, {
        s: "bar",
        n: 42,
        f: function() {
            console.log("*** SUCCESS ***");
        }
    });
});

casper.run(function() {
    this.exit();
})