ztail is fixed (#3501 #3507)
ztail is fixed (#3501 #3507)

stackbuilders/stackage,lwm/stackage,mgajda/stackage,michalkonecny/stackage,peti/stackage,fpco/stackage,asr/stackage,Shimuuar/stackage,spencerjanssen/stackage,Daniel-Diaz/stackage,ethercrow/stackage,wereHamster/stackage,athanclark/stackage,simonmichael/stackage,jonschoning/stackage,creichert/stackage,fimad/stackage,soenkehahn/stackage,mstksg/stackage,iand675/stackage,massysett/stackage,clinty/stackage,int-index/stackage,mrkkrp/stackage