Memory leak when reading TFolder from file

void process_file(const char* fname) {

  TFile rootFile(fname, "READ");

  TFolder *histos_folder;

  rootFile.GetObject("histos", histos_folder);

  rootFile.Close();

  // delete histos_folder; // this does not solve the issue

}

void test() {

  for ( auto &s : { "his05000_Reanalysis_1.root", "his05001_Reanalysis_1.root", "his05002_Reanalysis_1.root" }) {

    process_file(s);

  }

}