Fix "This Seq has already been iterated" when tapping a feed
Fix "This Seq has already been iterated" when tapping a feed

@data <== map {$_ + 1} <== @tap <== grep {$_ % 2} <== eager @data;
pushed the Seq from grep into @tap and then tried to re-use the same Seq
for further processing of the feed in map. Have to .list it to do that.

Fixes t/spec/S03-feeds/basic.t

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