ref: 275a80ff33ef2782f27c4fd720b65645c89e2bbb dir: /testdir/t.match1/
NF > 0 && match($NF, $1) { print $0, RSTART, RLENGTH if (RLENGTH != length($1)) printf "match error at %d: %d %d\n", NR, RLENGTH, RSTART >"/dev/tty" }