How to debug invalid field names

[Alwigi]

Hi, I am trying out autoform and during my tests I accidentally entered an invalid field in:

Now if this is the case my page comes up blank, I see nothing to indicate the problem in either Chrome's console or in Node Inspector. Because my app is so small and my form only has a single field I was able to work out the issue but do you have any advice how to trace a problem like this in larger apps?

[Alwigi]

The code seems to have been stripped out of my post, I have taken out all tags but you'll get the idea, it is this line in the template that causes the behaviour above:

div class=form-group if afFieldIsInvalid 'XXXX' has-error if

[aldeed]

I might be able to have it throw an error when the field you enter isn't part of the schema.