Fix native ref interacation of :D in multis.
Fix native ref interacation of :D in multis.

Native refs always point to a concrete value, since natives can't be
undefined.

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