enum Issue3020 {
    INSTANCE;

    void retrieveConstant() {
        Class<?> theClass = Issue3020.class;
        // :: error: (accessing.nullable)
        Object unused = passThrough(theClass.getEnumConstants())[0];
    }

    void nonNullArray(String[] p) {
        Object unused = passThrough(p)[0];
    }

    <T> T passThrough(T t) {
        return t;
    }
}