5.25/01 crashes with TVirtualStreamerInfo

ROOT
1

Hi,

I am under Mac OS X 10.6 64bit and yesterday have checked out the trunk of ROOT from SVN and compiled (although with some issues, see my recent topic under ROOT support). But if all is well I wanted to test it. I have a simple code:

#include <TH1D.h>
#include <TFile.h>
int main(int argc, char * argv[]){

  TFile * f = new TFile("file.root", "RECREATE");
  TH1D * h = new TH1D("h", "h", 100, 0., 100.);
  for(int i = 0; i < 10000; i++){
    h->Fill(1.2345);
  }
  h->Write();
  f->Close();
  delete h;
  delete f;
  return 0;
}

I setup, compile and link OK:

~/Prog/Test$ source /usr/local/root-5.XX/bin/thisroot.sh
~/Prog/Test$ g++ `root-config --cflags` -c test.cxx 
~/Prog/Test$ g++ -o test `root-config --libs` test.o

then when I run it I get:

~/Prog/Test$ ./test 
Error in <TPluginManager::FindHandler>: Cannot find plugin handler for TVirtualStreamerInfo! Does $ROOTSYS/etc/plugins/TVirtualStreamerInfo exist?

 *** Break *** segmentation violation

Any ideas?

thanks,
Balint

2

Do the ROOT test programs work? Do:

cd $ROOTSYS/tutorials
root
.x benchmarks.C
.q
cd $ROOTSYS/test
make stress
./stress -b 30

does this work for you? It works fine for me on my 10.6 system.

Cheers, Fons.

3

Hi,

Also your code needs to be updated. The TFile owns the histogram and deletes it when ‘f->Close()’ is called (i.e. the code snippet you copied leads to a double delete). Use [code]#include <TH1D.h>
#include <TFile.h>
int main(int argc, char * argv[]){

TFile * f = new TFile(“file.root”, “RECREATE”);
TH1D * h = new TH1D(“h”, “h”, 100, 0., 100.);
for(int i = 0; i < 10000; i++){
h->Fill(1.2345);
}
h->Write();
// If we delete the histogram explicilty, we must do so before
// closing the file
// delete h;
f->Close();
delete f;
return 0;
} [/code]

Cheers,
Philippe.