wtf.js

var my_eval = eval;

(function() {
    var x = 5,
        y = 5;
    eval("var x = 6");
    my_eval("var y = 6");
    console.log(x); // 6
    console.log(y); // 5
})();

console.log(y); // 6
//console.log(x); // error

heh...i just noticed this yesterday when fixing a narwhal/repl bug...still not quite sure what's going on but var'ing eval gives it its own magical scope

Yeah, looks like calling any alias to the eval function makes any variables created by eval go into the global scope.