regression: uncaught exceptions reporting several times

[tj]

require('should')

describe('tests: ', function(){
  it('test 1', function (done){
    setTimeout(function() {
      'one'.should.be.equal(1);
      done();
    }, 2000);
  });

  it('test 2', function(){
    'two'.should.be.equal('two');
  });

  it('test 3', function(done){
    process.nextTick(function(){
      'foo'.should.equal('foo');
      done();
    });
  })
})

outputs:

   λ mocha (master): ./bin/mocha test

  ....

  ✖ 2 of 3 tests failed:

  0) tests:  test 1:
     AssertionError: expected 'one' to equal 1
      at Object.equal (/Users/tj/Projects/mocha/node_modules/should/lib/should.js:306:10)
      at Object._onTimeout (/Users/tj/Projects/mocha/test.js:7:23)
      at Timer.ontimeout (timers.js:84:39)

  1) tests:  test 1:
     AssertionError: expected 'one' to equal 1
      at Object.equal (/Users/tj/Projects/mocha/node_modules/should/lib/should.js:306:10)
      at Object._onTimeout (/Users/tj/Projects/mocha/test.js:7:23)
      at Timer.ontimeout (timers.js:84:39)