Will web3 and eth have circle reference issues?

[vincentiss]

trafficstars

class web3{

    var ethInstance: web3.Eth?
    ....
   
    public class Eth: TransactionOptionsInheritable {
        ...
        public init(provider prov: Web3Provider, web3 web3instance: web3) {
            provider = prov
            web3 = web3instance
        }
    }

I didn't see the release of web3 in 'debug memory graph'.