TMapFile segfault

Burt Holzman (imapburt@nanalpc.phy.uic.edu)
Wed, 5 May 1999 00:28:58 -0500 (CDT)

Hi, Rooters.

We are trying to work with TMapFiles here, and I found the following
simple macro causes seg faults if I do not comment out the mfile->Close()
line at the end of the file. Other perturbations such as
monhisto->DrawCopy() have the same behavior. Operations on the copy
after mfile->Close() such as GetBinContent also cause segfaults.

I doing something wrong, or is there a bug somewhere?

---


{
  TH1S *monhisto = new TH1S("eventnr","event_nr",101,-0.5,100.5);
  TH1S *monhisto2 = new TH1S("eventnr2","event_nr2",101,-0.5,100.5);


  mfile = TMapFile::Create("onhistos.map","RECREATE", 10000000,"blabla");
  mfile->Add(monhisto,"eventnr"); 
		  
  for (Int_t i = 0; i < 52; i++) {
    monhisto->Fill(i);
    mfile->Update();
  }
  monhisto2->Add(monhisto,monhisto2);
  monhisto2->Draw();
  mfile->Close();
}