don't leak the MarbleRunnerManager
don't leak the MarbleRunnerManager

AndreiDuma/marble,Earthwings/marble,rku/marble,oberluz/marble,David-Gil/marble-dev,quannt24/marble,AndreiDuma/marble,adraghici/marble,oberluz/marble,probonopd/marble,Earthwings/marble,AndreiDuma/marble,oberluz/marble,oberluz/marble,AndreiDuma/marble,adraghici/marble,tzapzoor/marble,probonopd/marble,utkuaydin/marble,rku/marble,AndreiDuma/marble,tzapzoor/marble,tucnak/marble,David-Gil/marble-dev,oberluz/marble,Earthwings/marble,Earthwings/marble,utkuaydin/marble,probonopd/marble,rku/marble,tucnak/marble,adraghici/marble,utkuaydin/marble,utkuaydin/marble,quannt24/marble,utkuaydin/marble,Earthwings/marble,probonopd/marble,AndreiDuma/marble,tzapzoor/marble,tzapzoor/marble,rku/marble,Earthwings/marble,tucnak/marble,tucnak/marble,adraghici/marble,tucnak/marble,David-Gil/marble-dev,probonopd/marble,quannt24/marble,tzapzoor/marble,David-Gil/marble-dev,rku/marble,probonopd/marble,tzapzoor/marble,adraghici/marble,David-Gil/marble-dev,tucnak/marble,quannt24/marble,utkuaydin/marble,tzapzoor/marble,quannt24/marble,oberluz/marble,rku/marble,tzapzoor/marble,quannt24/marble,tucnak/marble,David-Gil/marble-dev,adraghici/marble,quannt24/marble,probonopd/marble