CLONE - Creating a FormTagLib class hides access to the built-in <g:form> tag.

I created FormTagLib.groovy in my application's grails-app/taglib directory. The contents are:

class FormTagLib {}

Now, when running my application and going to a view that uses the <g:form> tag, I get:

Message: Tag [form] does not exist. No tag library found for namespace: g
Caused by: Tag [form] does not exist. No tag library found for namespace: g

I'm guessing that FormTagLib is a name used by an internal Grails tag library file and it's getting shadowed by my tag library. This shouldn't happen - I should be able to call my tag library classes whatever I want without interfering with the default tags. Or, if this shadowing is intentional, the names of the internal tag libraries (and which tags are in which library) should be documented.