DuplicateThrows.ice:10: operation `op' has a throws clause with a duplicate exception: `e'
DuplicateThrows.ice:11: operation `op' has a throws clause with a duplicate exception: `e'
DuplicateThrows.ice:12: operation `op' has a throws clause with a duplicate exception: `e2'
DuplicateThrows.ice:13: operation `op' has a throws clause with duplicate exceptions: `e', `e2'