Fix up attribute access, including compile-time detection of missing/tyop'd attributes.
Fix up attribute access, including compile-time detection of missing/tyop'd attributes.

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