Incorrectly detecting global leak

[takinola]

When running the following code, Mocha incorrectly detects global leaks on the variables "ctr", "username" and "email"

function test(){
  this.ctr = typeof this.ctr !== 'undefined' ? this.ctr + 1 : 1;
  this.username = 'test_' + this.ctr;
  this.email = this.username + '@example.com';
  return {ctr: this.ctr, name: this.username, email: this.email};
}

describe('Global leak false positive', function(done){
 it('gives a false positive detection of global leaks', function(done){
   var x = test();
   done();
 });
});

environment
mocha 1.12.0
node 0.10.20

[tj]

when you call test() there's no receiver, so it becomes the global. If you're expecting it to be mocha's Test object you'd have to do test.call(this)