What are all the cases that make an [ImportingConstructor] not load?

Apr 1, 2013 at 2:36 PM
I posted this question on stackoverflow.

Basically an [ImportingConstructor] is failing to load, then when I allow a specific part to be default, the constructor it is able to load. The confusing part to me is that this value is properly hydrated. It would make sense to me if it came in as default because it would be a sign that my part composition was off.

Looking into it farther, it does not seem to have anything to do with a deep circular reference, since I have tested with that part having no dependencies of its own.

What are the possible causes for this type of behavior?