Bug, feature request, or proposal:

Getting an error when using the example code provided at https://material.angular.io/components/component/autocomplete

What is the expected behavior?

Should work like demo

What is the current behavior?

Error is thrown when field receives focus

What are the steps to reproduce?

Providing a Plunker (or similar) is the best way to get the team to see your issue.
Plunker template: http://plnkr.co/edit/o077B6uEiiIgkC0S06dd

What is the use-case or motivation for changing an existing behavior?

It should work or give a better error

Which versions of Angular, Material, OS, browsers are affected?

Material 2.0.0-beta.2
Angular 4.0.0-beta.7

Is there anything else we should know?