-- iteration 9 Task 4: a duplicate insert into a @unique column traps with
-- the unique-violation code (WO_T_UNIQUE = 10), raised at the engine's row
-- choke point. Uncaught here on purpose: the trap code is the assertion.
class Account {
  email: Text @unique
  balance: Int
}

fn main() {
  insert Account { email: "a@x", balance: 100 }
  insert Account { email: "a@x", balance: 200 }
}