RDF Progress bar seems to ignore Range() calls

[TomasDado]

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Description

When Range() is called on a RDF object with a progress bar, the progress bar seems to show all the events instead of reducing the events to the values provided in the Range() call.

Reproducer

void test() {

  ROOT::RDataFrame df(100);
  ROOT::RDF::Experimental::AddProgressBar(df);
  auto def = df.Define("x", [](){ return gRandom->Rndm(); });
  auto max = def.Range(0, 10);
  auto hist = max.Histo1D("x");
  std::cout << hist->Integral() << "\n";
}

The following code shows:

root [0] 
Processing test.cxx...
[Total elapsed time: 0:00m  processed files: 0 / 0  processed evts: 100 / 100]                                                                                                                      
10

While the progress bar should ideally show 10/10

ROOT version

Recent master branch

Installation method

git clone + local compilation

Operating system

Ubuntu 23.10

Additional context

No response