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Protect against empty weight container from pythia8 #32077

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Nov 18, 2020
Merged

Protect against empty weight container from pythia8 #32077

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4 changes: 4 additions & 0 deletions GeneratorInterface/Pythia8Interface/plugins/Pythia8Hadronizer.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -896,6 +896,10 @@ bool Pythia8Hadronizer::residualDecay() {
void Pythia8Hadronizer::finalizeEvent() {
bool lhe = lheEvent() != nullptr;

// protection against empty weight container
if ((event()->weights()).empty())
(event()->weights()).push_back(1.);

// now create the GenEventInfo product from the GenEvent and fill
// the missing pieces
eventInfo() = std::make_unique<GenEventInfoProduct>(event().get());
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