Comment by AndyKelley

This is a question I've wondered myself. It's nice to see some different answers and reasoning here.

The solution I came up with myself is to have a destroy() function that is capable of cleaning up no matter what state the object is in.

Example: https://github.com/andrewrk/libgroove/blob/bc7d72589eb297342...

Notice all the calls to groove_playlist_destroy. And then in the destroy function it checks the conditions it has to before cleaning up.

I'm not saying it's necessarily the best answer but I think it's a pretty clean strategy.