Wrong class name used in error message when "this" is used in an anonymous inner class

[agrieve]

@NullMarked
class Foo {
    interface Callback<T extends @Nullable Object> {
        void onResult(T result);
    }

    static void addCallback(Callback<@Nullable Integer> cb) {
    }
    static void removeCallback(Callback<@Nullable Integer> cb) {
    }

    public void main() {
        addCallback(new Callback<>() {
            @Override
            public void onResult(Integer value) {
                removeCallback(this);
            }
        });
    }
}

This results in:

Foo.java:21: warning: [NullAway] Cannot pass parameter of type Foo., as formal parameter has type Callback<@Nullable Integer>, which has mismatched type parameter nullability
                removeCallback(this);
                               ^
    (see http://t.uber.com/nullaway )

Note that "Foo" is the outer class, but the class it's complaining about is the anonymous Callback.

If you change main() to be static, it shows:

Foo.java:21: warning: [NullAway] Cannot pass parameter of type , as formal parameter has type Callback<@Nullable Integer>, which has mismatched type parameter nullability
                removeCallback(this);
                               ^
    (see http://t.uber.com/nullaway )