confusing error message

[kiloliter]

When I try to add a body to a space that is not initialized, I get the error:

Aborting due to Chipmunk error: You have already added this body to this space. You must not add it a second time.
        Failed condition: body->space != space

That error message is completely unrelated to the mistake that I made, and I spent a few minutes being very confused, as I was sure I had only added the body once.