Fix bug in attribute generic instantiation discovered by moritz++.
Fix bug in attribute generic instantiation discovered by moritz++.

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