ref: ba4a1c07f1bc7622f8a3dcd4f2d383f4ec70fc1c dir: /test/t.split9/
{ n = split ($0, x, FS) if (n != NF) print "botch at ", NR, n, NF for (i=1; i<=n; i++) if ($i != x[i]) print "diff at ", i, x[i], $i }