ref: 279f78a86cbff3f526fe1a1debd4d4f5766f96b0 dir: /test/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" }