github.com/benhoyt/goawk@v1.8.1/testdata/t.split8 (about)

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