Assigning to a static variable from a constructor is highly indicative of a bug,
or error-prone design.

Common reasons are:

1.  The field simply should be an instance field, and there's a bug.

2.  An attempt is being made to lazily initialize a static field. In this case,
    first consider whether lazy initialization is necessary: it often isn't. If
    it is, doing it from a constructor is very hairy: the static field could be
    accessed from a static method before the class is even initialized. Consider
    using a memoized `Supplier`.