gistfile1.js

function TheErrorator(value) {
    JSON.parse(JSON.stringify(value));
};

module.exports = {
    'throw exception' : function(assert) {
	TheErrorator();
    }
}

/* Output:
aiur:ExpressoBug saikat$ expresso bug.js 

/usr/local/bin/expresso:648
        stack = err.stack.replace(err.name, ''),
                          ^
TypeError: Cannot call method 'replace' of undefined
    at error (/usr/local/bin/expresso:648:27)
    at next (/usr/local/bin/expresso:684:21)
    at runSuite (/usr/local/bin/expresso:689:6)
    at check (/usr/local/bin/expresso:586:16)
    at runFile (/usr/local/bin/expresso:590:10)
    at Array.forEach (native)
    at runFiles (/usr/local/bin/expresso:569:11)
    at run (/usr/local/bin/expresso:545:5)
    at Object.<anonymous> (/usr/local/bin/expresso:759:13)
    at Module._compile (module:384:23)
*/