Fix additional dereference, thanks to TimToady++
Fix additional dereference, thanks to TimToady++

$ perl6-p -e 'my %h=a=>1,b=>2; say so all %h<a b c>:exists'
False

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