#1310 False negative for NP_METHOD_RETURN_RELAXING_ANNOTATION

[Aaron Sheldon]

When an interface returns @Nonnull, an implementation should not be able to override this with @Nullable.

FindBugs version: 3.0.0
JDK/JRE version: Java 8

public interface CustomInterface {
    @Nonnull
    public Object getObject();
}

public class ConcreteClass implements CustomInterface {

    @Override
    @Nullable // Return relaxes nullness
    public Object getObject() {
        return null;
    }
}

[Andrey Loskutov]

Yep. We catch only @CheckForNull here, not @Nullable.

[Andrey Loskutov]

Fix: https://code.google.com/p/findbugs/source/detail?r=d751a7d580bbe3c8b444e92ddbeb34b44508b883