How to find components with empty ids?

[fhisg]

Since 3.1 we get this in dev mode:

WARN:Log:'' is not a valid JavaScript identifier. DataSource and DataBoundComponent field names are required to be valid JavaScript identifiers

Of course with an empty id I have no way of knowing which component is affected. If we compile and run in production mode that warning doesn't show up anywhere (stacktrace in dev mode doesn't help).
It'd be helpful if the warning message included some more info about the affect component (e.g. type).

[Isomorphic]

This is a valid point. We've made a change to both the 3.1p and 4.0d branches to include the ID of the DataSource or Component to which the field is applied.
This will show up in nightly builds dated Jan 9 and above.

Regards
Isomorphic Software