ref: e533e05deffd621ff5dcf683446ef759ec2949fd 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" }