From @zoffixznet

02​:30 IOninja m​: sub x (% (​:$made-on, :$routines, :$total, :$unique)) {␤␤␤␤␤␤␤␤␤␤␤␤␤ Q​:c​:to/END/␤y{$total}y␤END␤ }( |%(​:42made-on, :42routines, :42total, :42unique) )
02​:30 camelia rakudo-moar dd4dfb​: OUTPUT​: «Too few positionals passed; expected 1 argument but got 0␤ in sub x at <tmp> line 15␤ in block <unit> at <tmp> line 1␤␤»
02​:31 IOninja m​: sub x (% (​:$made-on, :$routines, :$total, :$unique)) {␤␤␤␤␤␤␤␤␤␤␤␤␤ Q​:c​:to/END/␤y{$total}y␤␤␤␤␤␤␤␤␤␤␤{'meow'}␤END␤ }( |%(​:42made-on, :42routines, :42total, :42unique) )
02​:31 camelia rakudo-moar dd4dfb​: OUTPUT​: «Too few positionals passed; expected 1 argument but got 0␤ in sub x at <tmp> line 26␤ in block <unit> at <tmp> line 1␤␤»
02​:31 IOninja Bug. If anyone wants to report (reported `line` is for the HEREDOC's last block, even though the issue is in `sub x`'s arguments)

https://irclog.perlgeek.de/perl6/2017-02-26#i_14166725