make Hash.push a bit more efficient and correct
make Hash.push a bit more efficient and correct

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