# I am getting an error code that I don't know how to decode

ROOT Version: ROOT 6.30/02
Platform: Lxplus
Compiler: Python

My code crashes when computing the histograms for dijet mass, I am unable to understand what the error is even telling me which makes this a hard problem to solve. The code it uses is

``````ComputeInvariantMass_code =
ROOT::VecOps::RVec<double> ComputeInvariantMass(ROOT::VecOps::RVec<float> pt, ROOT::VecOps::RVec<float> eta, ROOT::VecOps::RVec<float> phi,
ROOT::VecOps::RVec<float> m)
{
if(2 > pt.size()) return ROOT::VecOps::RVec<double> {std::numeric_limits<double>::min()};

TLorentzVector p[2];
//This creates all the p vectors
for(int i ; i < pt.size(); i++) p[i].SetPtEtaPhiM(pt[i], eta[i], phi[i], m[i]);

//We create an empty RVec
ROOT::VecOps::RVec<double> r;
//Then create an RVec with all possible unique 2 combinations of indexes for the momentum vectors
auto v_1 = ROOT::VecOps::Combinations (pt, 2);
//We then define a size to make the r RVec accomidate all the combinations
const auto size = v_1[0].size();
r.reserve(size);

//We then fill up the r RVec with index values from v_1 for the momentum then get invariant mass
for(int i=0; i<size; i++) {
r.emplace_back((p[v_1[0][i]] + p[v_1[1][i]]).M());
}
return r;

}

ROOT.gInterpreter.Declare(ComputeInvariantMass_code)ComputeInvariantMass_code = '''
ROOT::VecOps::RVec<double> ComputeInvariantMass(ROOT::VecOps::RVec<float> pt, ROOT::VecOps::RVec<float> eta, ROOT::VecOps::RVec<float> phi,
ROOT::VecOps::RVec<float> m)
{
if(2 > pt.size()) return ROOT::VecOps::RVec<double> {std::numeric_limits<double>::min()};

TLorentzVector p[2];
//This creates all the p vectors
for(int i ; i < pt.size(); i++) p[i].SetPtEtaPhiM(pt[i], eta[i], phi[i], m[i]);

//We create an empty RVec
ROOT::VecOps::RVec<double> r;
//Then create an RVec with all possible unique 2 combinations of indexes for the momentum vectors
auto v_1 = ROOT::VecOps::Combinations (pt, 2);
//We then define a size to make the r RVec accomidate all the combinations
const auto size = v_1[0].size();
r.reserve(size);

//We then fill up the r RVec with index values from v_1 for the momentum then get invariant mass
for(int i=0; i<size; i++) {
r.emplace_back((p[v_1[0][i]] + p[v_1[1][i]]).M());
}
return r;

}

ROOT.gInterpreter.Declare(ComputeInvariantMass_code)
``````

I know there are some ways of viewing the debug, but I am unsure on how to access them on lxplus, and I am currently using VScode to code. Can anyone help me understand the error that is being thrown up?

I am posting Error message below as it is quite large.

pt 1 of error

``````Processing sample SMWZqcd at Samples/bkgWZ/SM_WZqcd/events_SMWZqcd.root
TChain created with 10000 entries
('argsMuons', 'ROOT::VecOps::Reverse(ROOT::VecOps::Argsort(Muon.PT));')
('argsElectron', 'ROOT::VecOps::Reverse(ROOT::VecOps::Argsort(Electron.PT));')
('leptons', 'ROOT::VecOps::Concatenate(Electron.PT, Muon.PT);')
('argLeptons', 'ROOT::VecOps::Reverse(ROOT::VecOps::Argsort(leptons));')
('argJets', 'ROOT::VecOps::Reverse(ROOT::VecOps::Argsort(Jet.PT));')
('muonPt', 'ROOT::VecOps::Take(Muon.PT, argsMuons);')
('electronPt', 'ROOT::VecOps::Take(Electron.PT, argsElectron);')
('leptonPt', 'ROOT::VecOps::Take(leptons, argLeptons);')
('jetPt', ' ROOT::VecOps::Take(Jet.PT, argJets);')
('met', 'MissingET.MET[0]')
('leptonMass', 'LeptonMass(electronPt, muonPt, leptonPt);')
('leptonEta', 'ROOT::VecOps::Take(ROOT::VecOps::Concatenate(Electron.Eta, Muon.Eta), argLeptons);')
('leptonPhi', 'ROOT::VecOps::Take(ROOT::VecOps::Concatenate(Electron.Phi, Muon.Phi), argLeptons);')
('leptonCharge', 'ROOT::VecOps::Take(ROOT::VecOps::Concatenate(Electron.Charge, Muon.Charge), argLeptons);')
('jetPhi', 'ROOT::VecOps::Take(Jet.Phi, argJets);')
('jetEta', 'ROOT::VecOps::Take(Jet.Eta, argJets);')
('jetMass', 'ROOT::VecOps::Take(Jet.Mass, argJets);')
('goodElectrons', 'electronPt > 15')
('goodMuons', 'muonPt > 15')
('goodLeptons', 'leptonPt > 15')
('nLeptons', 'Sum(goodElectrons) + Sum(goodMuons)')
('goodJets', 'jetPt >= 50')
('nJets', 'Sum(goodJets)')
('mll', 'ComputeInvariantMassLeptons(leptonPt[goodLeptons], leptonEta[goodLeptons], leptonPhi[goodLeptons], leptonMass[goodLeptons])')
('mjj', 'ComputeInvariantMass(jetPt[goodJets], jetEta[goodJets], jetPhi[goodJets], jetMass[goodJets])')
('dPhijj', 'ComputeDPhijj(jetPhi[goodJets])')
('dEtajj', 'jetPhi[goodJets].size() >= 2 ? std::fabs(jetEta[goodJets][0] - jetEta[goodJets][1]) : std::numeric_limits<float>::lowest()')
('pTj1', 'jetPt[goodJets].size() >= 2 ? jetPt[goodJets][0] : std::numeric_limits<double>::lowest();')
('pTj2', 'jetPt[goodJets].size() >= 2 ? jetPt[goodJets][1] : std::numeric_limits<double>::lowest();')
('pTj3', 'jetPt[goodJets].size() >= 3 ? jetPt[goodJets][2] : std::numeric_limits<double>::lowest();')
('pTl1', 'leptonPt[goodLeptons].size() >= 2 ? leptonPt[goodLeptons][0] : std::numeric_limits<double>::lowest();')
('pTl2', 'leptonPt[goodLeptons].size() >= 2 ? leptonPt[goodLeptons][1] : std::numeric_limits<double>::lowest();')
('etal1', 'leptonEta[goodLeptons].size() >= 2 ? leptonEta[goodLeptons][0] : std::numeric_limits<double>::lowest();')
('etal2', 'leptonEta[goodLeptons].size() >= 2 ? leptonEta[goodLeptons][1] : std::numeric_limits<double>::lowest();')
('ptrel', '(pTl1*pTl2)/(pTj1*pTj2)')
('dRj1l1', 'ComputeDRjl(jetPhi[goodJets], jetEta[goodJets], leptonPhi[goodLeptons], leptonEta[goodLeptons], 0, 0)')
('dRj2l2', 'ComputeDRjl(jetPhi[goodJets], jetEta[goodJets], leptonPhi[goodLeptons], leptonEta[goodLeptons], 1, 1)')
('dRjj', 'ComputeDRjj(jetPhi[goodJets], jetEta[goodJets])')
('W4vec', 'ComputeWZMass(0,nLeptons,Sum(goodElectrons), Sum(goodMuons),leptonPt[goodLeptons], leptonEta[goodLeptons], leptonPhi[goodLeptons], leptonMass[goodLeptons], MissingET.MET[0], MissingET.Phi[0])')
('Z4vec', 'ComputeWZMass(1, nLeptons,Sum(goodElectrons), Sum(goodMuons),leptonPt[goodLeptons], leptonEta[goodLeptons], leptonPhi[goodLeptons], leptonMass[goodLeptons], MissingET.MET[0], MissingET.Phi[0])')
('WZmass', '(W4vec + Z4vec).M()')
('Wmass', 'W4vec.M()')
('Zmass', 'Z4vec.M()')
(('mll', 'Mll', 50, 0, 5000.0), 'mll')
(('mjj', 'Mjj', 10, 0, 10000.0), 'mjj')
*** Break *** segmentation violation

===========================================================
There was a crash.
This is the entire stack trace of all threads:
===========================================================

#0  0x00007faa2348679a in __futex_abstimed_wait_common () from /lib64/libc.so.6
#1  0x00007faa23491c48 in __new_sem_wait_slow64.constprop.0 () from /lib64/libc.so.6
#2  0x00007faa019a26b6 in XrdSysSemaphore::Wait (this=0xcb350a0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysPthread.hh:509
#3  XrdCl::SyncQueue<XrdCl::JobManager::JobHelper>::Get (this=0xcb30648) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClSyncQueue.hh:66
#4  XrdCl::JobManager::RunJobs (this=0xcb30630) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:151
#5  0x00007faa019a2759 in RunRunnerThread (arg=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:34
#6  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#7  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2348679a in __futex_abstimed_wait_common () from /lib64/libc.so.6
#1  0x00007faa23491c48 in __new_sem_wait_slow64.constprop.0 () from /lib64/libc.so.6
#2  0x00007faa019a26b6 in XrdSysSemaphore::Wait (this=0xcb350a0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysPthread.hh:509
#3  XrdCl::SyncQueue<XrdCl::JobManager::JobHelper>::Get (this=0xcb30648) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClSyncQueue.hh:66
#4  XrdCl::JobManager::RunJobs (this=0xcb30630) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:151
#5  0x00007faa019a2759 in RunRunnerThread (arg=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:34
#6  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#7  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2348679a in __futex_abstimed_wait_common () from /lib64/libc.so.6
#1  0x00007faa23491c48 in __new_sem_wait_slow64.constprop.0 () from /lib64/libc.so.6
#2  0x00007faa019a26b6 in XrdSysSemaphore::Wait (this=0xcb350a0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysPthread.hh:509
#3  XrdCl::SyncQueue<XrdCl::JobManager::JobHelper>::Get (this=0xcb30648) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClSyncQueue.hh:66
#4  XrdCl::JobManager::RunJobs (this=0xcb30630) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:151
#5  0x00007faa019a2759 in RunRunnerThread (arg=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:34
#6  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#7  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa234d4075 in clock_nanosleep
GLIBC_2.2.5 () from /lib64/libc.so.6
#1  0x00007faa234d8c87 in nanosleep () from /lib64/libc.so.6
#2  0x00007faa01b15f18 in XrdSysTimer::Wait (mills=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysTimer.cc:239
#5  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#6  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcbb3030, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcbb2e30, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb46b20, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb86820, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb35660, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcbb1410, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0x4915950, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb41fd0, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb5fc40, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0x49a0860, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa234d8a3f in wait4 () from /lib64/libc.so.6
#1  0x00007faa2344b243 in do_system () from /lib64/libc.so.6
#2  0x00007faa22efb47c in TUnixSystem::StackTrace() () from /cvmfs/sft.cern.ch/lcg/views/LCG_105/x86_64-el9-gcc11-opt/lib/libCore.so
#3  0x00007faa231d80e3 in (anonymous namespace)::TExceptionHandlerImp::HandleException(int) () from /cvmfs/sft.cern.ch/lcg/views/LCG_105/x86_64-el9-gcc11-opt/lib/libcppyy_backend3_9.so
#4  0x00007faa22ef8a11 in TUnixSystem::DispatchSignals(ESignals) () from /cvmfs/sft.cern.ch/lcg/views/LCG_105/x86_64-el9-gcc11-opt/lib/libCore.so
#5  <signal handler called>
#6  0x00007faa13f091e9 in ?? ()
#8  0x00007faa0c1b8220 in ?? ()
#10 0x00007faa0c1b9e58 in ?? ()
#11 0x0000000000000008 in ?? ()
#14 0x00007faa0c1b9d93 in ?? ()
#15 0x0000000000000008 in ?? ()
#16 0x00007faa0c1b9e40 in ?? ()
#17 0x00007faa0c1b9dd0 in ?? ()
#18 0x0000000000000002 in ?? ()
#23 0x0000000000000001 in ?? ()
#26 0x00007faa0c1b9ce6 in ?? ()
#27 0x0000000000000000 in ?? ()
===========================================================

The lines below might hint at the cause of the crash. If you see question
marks as part of the stack trace, try to recompile with debugging information
enabled and export CLING_DEBUG=1 environment variable before running.
You may get help by asking at the ROOT forum https://root.cern/forum
preferably using the command (.forum bug) in the ROOT prompt.
Only if you are really convinced it is a bug in ROOT then please submit a
report at https://root.cern/bugs or (preferably) using the command (.gh bug) in
the ROOT prompt. Please post the ENTIRE stack trace
from above as an attachment in addition to anything else
that might help us fixing this issue.
===========================================================
#6  0x00007faa13f091e9 in ?? ()
#8  0x00007faa0c1b8220 in ?? ()
#10 0x00007faa0c1b9e58 in ?? ()
#11 0x0000000000000008 in ?? ()
#14 0x00007faa0c1b9d93 in ?? ()
#15 0x0000000000000008 in ?? ()
#16 0x00007faa0c1b9e40 in ?? ()
#17 0x00007faa0c1b9dd0 in ?? ()
#18 0x0000000000000002 in ?? ()
#23 0x0000000000000001 in ?? ()
#26 0x00007faa0c1b9ce6 in ?? ()
#27 0x0000000000000000 in ?? ()
===========================================================
``````

pt 2 of error

`````` *** Break *** segmentation violation

===========================================================
There was a crash.
This is the entire stack trace of all threads:
===========================================================

#0  0x00007faa2348679a in __futex_abstimed_wait_common () from /lib64/libc.so.6
#1  0x00007faa23491c48 in __new_sem_wait_slow64.constprop.0 () from /lib64/libc.so.6
#2  0x00007faa019a26b6 in XrdSysSemaphore::Wait (this=0xcb350a0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysPthread.hh:509
#3  XrdCl::SyncQueue<XrdCl::JobManager::JobHelper>::Get (this=0xcb30648) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClSyncQueue.hh:66
#4  XrdCl::JobManager::RunJobs (this=0xcb30630) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:151
#5  0x00007faa019a2759 in RunRunnerThread (arg=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:34
#6  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#7  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2348679a in __futex_abstimed_wait_common () from /lib64/libc.so.6
#1  0x00007faa23491c48 in __new_sem_wait_slow64.constprop.0 () from /lib64/libc.so.6
#2  0x00007faa019a26b6 in XrdSysSemaphore::Wait (this=0xcb350a0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysPthread.hh:509
#3  XrdCl::SyncQueue<XrdCl::JobManager::JobHelper>::Get (this=0xcb30648) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClSyncQueue.hh:66
#4  XrdCl::JobManager::RunJobs (this=0xcb30630) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:151
#5  0x00007faa019a2759 in RunRunnerThread (arg=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:34
#6  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#7  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2348679a in __futex_abstimed_wait_common () from /lib64/libc.so.6
#1  0x00007faa23491c48 in __new_sem_wait_slow64.constprop.0 () from /lib64/libc.so.6
#2  0x00007faa019a26b6 in XrdSysSemaphore::Wait (this=0xcb350a0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysPthread.hh:509
#3  XrdCl::SyncQueue<XrdCl::JobManager::JobHelper>::Get (this=0xcb30648) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClSyncQueue.hh:66
#4  XrdCl::JobManager::RunJobs (this=0xcb30630) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:151
#5  0x00007faa019a2759 in RunRunnerThread (arg=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdCl/XrdClJobManager.cc:34
#6  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#7  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa234d4075 in clock_nanosleep
GLIBC_2.2.5 () from /lib64/libc.so.6
#1  0x00007faa234d8c87 in nanosleep () from /lib64/libc.so.6
#2  0x00007faa01b15f18 in XrdSysTimer::Wait (mills=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysTimer.cc:239
#5  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#6  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcbb3030, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcbb2e30, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb46b20, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb86820, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb35660, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcbb1410, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0x4915950, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb41fd0, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0xcb5fc40, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa2350e21e in epoll_wait () from /lib64/libc.so.6
#1  0x00007faa01b105f2 in XrdSys::IOEvents::PollE::Begin (this=0x49a0860, syncsem=<optimized out>, retcode=<optimized out>, eTxt=<optimized out>) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEventsPollE.icc:212
#2  0x00007faa01b0d03d in XrdSys::IOEvents::BootStrap::Start (parg=0x7fff83ead4c0) at /build/jenkins/workspace/lcg_release_pipeline/build/externals/xrootd-5.6.3/src/xrootd/5.6.3/src/XrdSys/XrdSysIOEvents.cc:149
#4  0x00007faa23489c02 in start_thread () from /lib64/libc.so.6
#5  0x00007faa2350ec40 in clone3 () from /lib64/libc.so.6

#0  0x00007faa234d8a3f in wait4 () from /lib64/libc.so.6
#1  0x00007faa2344b243 in do_system () from /lib64/libc.so.6
#2  0x00007faa22efb47c in TUnixSystem::StackTrace() () from /cvmfs/sft.cern.ch/lcg/views/LCG_105/x86_64-el9-gcc11-opt/lib/libCore.so
#3  0x00007faa231d7f63 in (anonymous namespace)::TExceptionHandlerImp::HandleException(int) () from /cvmfs/sft.cern.ch/lcg/views/LCG_105/x86_64-el9-gcc11-opt/lib/libcppyy_backend3_9.so
#4  0x00007faa22ef8a11 in TUnixSystem::DispatchSignals(ESignals) () from /cvmfs/sft.cern.ch/lcg/views/LCG_105/x86_64-el9-gcc11-opt/lib/libCore.so
#5  <signal handler called>
#6  0x00007faa13f091e9 in ?? ()
#8  0x00007faa0c1b8220 in ?? ()
#10 0x00007faa0c1b9e58 in ?? ()
#11 0x0000000000000008 in ?? ()
#14 0x00007faa0c1b9d93 in ?? ()
#15 0x0000000000000008 in ?? ()
#16 0x00007faa0c1b9e40 in ?? ()
#17 0x00007faa0c1b9dd0 in ?? ()
#18 0x0000000000000002 in ?? ()
#23 0x0000000000000001 in ?? ()
#26 0x00007faa0c1b9ce6 in ?? ()
#27 0x0000000000000000 in ?? ()
===========================================================

The lines below might hint at the cause of the crash. If you see question
marks as part of the stack trace, try to recompile with debugging information
enabled and export CLING_DEBUG=1 environment variable before running.
You may get help by asking at the ROOT forum https://root.cern/forum
preferably using the command (.forum bug) in the ROOT prompt.
Only if you are really convinced it is a bug in ROOT then please submit a
report at https://root.cern/bugs or (preferably) using the command (.gh bug) in
the ROOT prompt. Please post the ENTIRE stack trace
from above as an attachment in addition to anything else
that might help us fixing this issue.
===========================================================
#6  0x00007faa13f091e9 in ?? ()
#8  0x00007faa0c1b8220 in ?? ()
#10 0x00007faa0c1b9e58 in ?? ()
#11 0x0000000000000008 in ?? ()
#14 0x00007faa0c1b9d93 in ?? ()
#15 0x0000000000000008 in ?? ()
#16 0x00007faa0c1b9e40 in ?? ()
#17 0x00007faa0c1b9dd0 in ?? ()
#18 0x0000000000000002 in ?? ()
#23 0x0000000000000001 in ?? ()
The error seems to originate from this snippet of code `histo = rd.Histo2D(*h) histo.Scale( cross_section[sampleName] / tot_events * lumi )` the inside currently is just a float of 0.001 so it is essentially `histo.Scale(0.001)`. I still don’t know what is causing the error.