This one also creates graphs from code and once you write a fix for one pattern you can apply it to all.
EDIT: it's for python
Though with the option to manually interact with local projects so it isn't locked to one particular repository manager.
I'm skeptical that this would work, but if it does great, probably better suited to bugs than features?
I'm quite interested in the possibility of just letting it loose on the internet, and seeing what you get back.