UnnecessaryMethodReference gives false-positive

[wendigo]

Description of the problem / feature request:

UnnecessaryMethodReference gives a false-positive when variable is super.

Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

package test;

public class TestErrorProneSuper
{
    public static class S
            implements Closeable
    {
        @Override
        public void close()
                throws IOException
        {
            System.out.println("Closing S");
        }
    }

    public static class T
            extends S
    {
        Closer closer = Closer.create();

        @Override
        public void close() throws IOException
        {
            System.out.println("Closing T");
            closer.register(super::close);
        }
    }

    public static void main(String[] args)
    {
        try {
            new T().close();
        }
        catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }
}

Gives false-positive:

TestErrorProneSuper.java:[44,29] [UnnecessaryMethodReference] This method reference is unnecessary, and can be replaced with the variable itself.
(see https://errorprone.info/bugpattern/UnnecessaryMethodReference)
Did you mean 'closer.register(super);'?

which is not correct (cannot pass super as a variable: TestErrorProneSuper.java:[44,34] '.' expected)

What version of Error Prone are you using?

2.5.0

Have you found anything relevant by searching the web?

Nope :)