Questione giuridica chiave
Whether the nullity appeal could challenge the cantonal sentence review and/or the first-instance judgment.
Decisione estratta
The appeal was inadmissible insofar as it attacked the first-instance judgment; only the cantonal cassation decision could be reviewed.
Motivazione estratta
A nullity appeal lay only against decisions not open to cantonal legal remedies for federal-law violations; the federal court therefore examined only whether the cantonal court correctly applied federal sentencing law.