Issue detecting loop

[amonaco]

Hello Thiago,

Thanks for the great work and effort in this library. I have an issue detecting loops when the loop is inside an async library call:

async.parallel([function(cb) { cb (null, true); }], function(error, result) {

  var arr_a = [0, 1, 2, 3, 4];
  var arr_b = [];

  arr_b = arr_a;
  // arr_b = _.clone(arr_a);

  // infinite loop
  for (i = 0; i < arr_a.length; i++) {
    arr_b.push("foo");
  }
});

Any clues on why is the loop not being detected?

Since I'm building a sandbox for running 'untrusted' code I'm trying to find the best way to avoid a resource bomb like this.

Thanks!