github.com/benhoyt/goawk@v1.8.1/testdata/t.split9a (about)

     1  BEGIN { FS = "a" }
     2  {
     3  	n = split ($0, x, FS)
     4  	if (n != NF)
     5  		print "botch at ", NR, n, NF
     6  	for (i=1; i<=n; i++)
     7  		if ($i != x[i])
     8  			print "diff at ", i, x[i], $i
     9  }