committable6

query

HEAD sub here-we-get-a-seq($seq) { say ‘all elements of the seq:’; .say for $seq }; my $s = <a b c>.words; say $s.head; here-we-get-a-seq $s

result

¦«HEAD(98c7e51)»:
a
The iterator of this Seq is already in use/consumed by another Seq
(you might solve this by adding .cache on usages of the Seq, or
by assigning the Seq into an array)
  in sub here-we-get-a-seq at /tmp/CTCLKcLD4t line 1
  in block <unit> at /tmp/CTCLKcLD4t line 1

all elements of the seq:
 «exit code = 1»