gistfile1.txt

//Retain cycles are very easy to make when you have complex closures    
//For example here `childRouter` is being captured as a strong in the closure 
//Causing a leak for ALL routers in my app
//The funny thing was that I was looking at this piece of code for 15 minutes and couldn't find anything wrong

func addChildRouter(childRouter : Router) {
        childRouters.append(childRouter)
        if let removeObservable = childRouter.removeFromParentRouter {
            removeObservable.subscribeNext({ [weak self] in
                if let `self` = self {
                    let index = self.childRouters.indexOf({ (router) -> Bool in
                        return router === childRouter //STRONG REFERENCE TO CHILD ROUTER, USE [weak childRouter]
                    })
                    if let index = index {
                        self.childRouters.removeAtIndex(index)
                    }
                }
                })
            .addDisposableTo(disposeBag)
        }
    }