Commit indexer is not working for repository root

I am creating Virtual File system for my application. As input I am getting file paths or directory paths. I found that app works perfectly for any paths except for root.

Technically speaking I cannot get TreeEntry for repo root directory.

            Commit commit = GetCommit(commitHash);

            // this works
            var file = commit["foo.txt"];
            var dir1 = commit["var/logs"];
            var dir2 = commit["var"];

            // this doesn't work
            ver rootDir = commit["/"]; // returns null

Reproduza a diferença entre commit["foo.txt"], commit["var"] e commit["/"] usando o comportamento de commit indexer e TreeEntry descrito aqui. Acompanhe como o indexador resolve a raiz do repositório e, em seguida, verifique se uma busca pela raiz retorna o TreeEntry esperado sem prejudicar as buscas por arquivos ou diretórios aninhados.