github.com/benhoyt/goawk@v1.8.1/testdata/t.8.y (about)

     1  {$1=$2; print}
     2  
     3  # this should print nothing for an empty input line
     4  # since it has only referred to $2, not created it,
     5  # and thus only $1 exists (and it's null).
     6  
     7  # is this right???