Fix memory handling in rebless_subclass
Fix memory handling in rebless_subclass

Se tt #1746 for details

ab5tract/rakudo,softmoth/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,niner/rakudo,skids/rakudo,rakudo/rakudo,salortiz/rakudo,usev6/rakudo,softmoth/rakudo,jonathanstowe/rakudo,rakudo/rakudo,rakudo/rakudo,LLFourn/rakudo,cognominal/rakudo,ab5tract/rakudo,tbrowder/rakudo,sjn/rakudo,tony-o/rakudo,dwarring/rakudo,zhuomingliang/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,pmurias/rakudo,tbrowder/rakudo,nbrown/rakudo,samcv/rakudo,ungrim97/rakudo,labster/rakudo,skids/rakudo,ungrim97/rakudo,Leont/rakudo,teodozjan/rakudo,cygx/rakudo,ugexe/rakudo,retupmoca/rakudo,ab5tract/rakudo,azawawi/rakudo,jonathanstowe/rakudo,Gnouc/rakudo,LLFourn/rakudo,raydiak/rakudo,teodozjan/rakudo,labster/rakudo,cygx/rakudo,b2gills/rakudo,sjn/rakudo,sergot/rakudo,pmurias/rakudo,Leont/rakudo,ugexe/rakudo,ungrim97/rakudo,sjn/rakudo,tony-o/deb-rakudodaily,tbrowder/rakudo,ugexe/rakudo,dwarring/rakudo,tony-o/deb-rakudodaily,cognominal/rakudo,nbrown/rakudo,Gnouc/rakudo,ab5tract/rakudo,dwarring/rakudo,azawawi/rakudo,rjbs/rakudo,salortiz/rakudo,pmurias/rakudo,cognominal/rakudo,zostay/rakudo,salortiz/rakudo,nbrown/rakudo,tony-o/rakudo,awwaiid/rakudo,teodozjan/rakudo,dwarring/rakudo,cognominal/rakudo,rjbs/rakudo,dankogai/rakudo,cygx/rakudo,b2gills/rakudo,LLFourn/rakudo,MasterDuke17/rakudo,samcv/rakudo,cygx/rakudo,retupmoca/rakudo,niner/rakudo,lucasbuchala/rakudo,awwaiid/rakudo,labster/rakudo,paultcochrane/rakudo,cognominal/rakudo,sergot/rakudo,raydiak/rakudo,tony-o/deb-rakudodaily,Leont/rakudo,Gnouc/rakudo,nbrown/rakudo,niner/rakudo,jonathanstowe/rakudo,tony-o/rakudo,softmoth/rakudo,lucasbuchala/rakudo,tbrowder/rakudo,labster/rakudo,nunorc/rakudo,tony-o/deb-rakudodaily,azawawi/rakudo,salortiz/rakudo,ab5tract/rakudo,retupmoca/rakudo,zhuomingliang/rakudo,paultcochrane/rakudo,ungrim97/rakudo,Leont/rakudo,salortiz/rakudo,tony-o/rakudo,azawawi/rakudo,nunorc/rakudo,Gnouc/rakudo,usev6/rakudo,azawawi/rakudo,pmurias/rakudo,awwaiid/rakudo,rakudo/rakudo,jonathanstowe/rakudo,samcv/rakudo,tony-o/deb-rakudodaily,nbrown/rakudo,dankogai/rakudo,rjbs/rakudo,paultcochrane/rakudo,awwaiid/rakudo,dankogai/rakudo,skids/rakudo,softmoth/rakudo,usev6/rakudo,zostay/rakudo,nbrown/rakudo,MasterDuke17/rakudo,laben/rakudo,skids/rakudo,zostay/rakudo,paultcochrane/rakudo,dankogai/rakudo,raydiak/rakudo,laben/rakudo,skids/rakudo,LLFourn/rakudo,sergot/rakudo,LLFourn/rakudo,tony-o/deb-rakudodaily,sjn/rakudo,niner/rakudo,tbrowder/rakudo,b2gills/rakudo,dankogai/rakudo,ungrim97/rakudo,sergot/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,samcv/rakudo,zostay/rakudo,labster/rakudo,MasterDuke17/rakudo,usev6/rakudo,usev6/rakudo,raydiak/rakudo,cygx/rakudo,nunorc/rakudo,nunorc/rakudo,lucasbuchala/rakudo,zhuomingliang/rakudo,tbrowder/rakudo,retupmoca/rakudo,salortiz/rakudo,sjn/rakudo,b2gills/rakudo,paultcochrane/rakudo,labster/rakudo,tony-o/deb-rakudodaily,tony-o/rakudo,teodozjan/rakudo,rakudo/rakudo,b2gills/rakudo,Gnouc/rakudo,ugexe/rakudo,softmoth/rakudo,laben/rakudo,samcv/rakudo,laben/rakudo,zhuomingliang/rakudo,tony-o/rakudo,jonathanstowe/rakudo,ugexe/rakudo,rakudo/rakudo