Make :delete give a better error message if not supported on the object
Make :delete give a better error message if not supported on the object

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