github.com/benhoyt/goawk@v1.8.1/testdata/gawk/nfldstr.awk (about)

     1  $1 == 0 {
     2  	print "bug"
     3  }
     4  {
     5  	$0 = "0" 
     6  	if (!$0)
     7  		print "another bug"
     8  	$0 = a = "0" 
     9  	if (!$0)
    10  		print "yet another bug"
    11  	if ($1)
    12  		print "a buggie"
    13  }