RootCauseunvalidated
The `Manager` class's `salary` member is hiding the member from the `Employee` class. — For the variable `m`, you initialize the `Manager.salary` member, but the `compareTo` method refers to the `Employee.salary` member. Tension: which is `null`. Outcome: the `compareTo` method refers to the `Employee.salary` member, which is `null`.
f433f8e8-bebc-4e0a-aaf3-ba08cdb97e3c
The Manager class's salary member is hiding the member from the Employee class. — For the variable m, you initialize the Manager.salary member, but the compareTo method refers to the Employee.salary member. Tension: which is null. Outcome: the compareTo method refers to the Employee.salary member, which is null.