bxdpp_processing failed for some mctools examples with preliminary support for sequential G4 10.5

In examples/mctools/ex00:

bxg4_production runs ok

### WARNING: G4EmProcessOptions class is obsolete and will be removed in the next public release 
    Please, try to use G4EmParameters class and/or UI interface to EM parameters
Warning : Region <ShieldingRegion> does not have specific production cuts,
even though it appears in the current tracking world.
Default cuts are used for this region.
...
HepRandomEngine::put called -- no effect!
[debug:virtual void mctools::g4::event_action::BeginOfEventAction(const G4Event*):192] Event #0 starts.
[notice:virtual void mctools::g4::event_action::BeginOfEventAction(const G4Event*):209] Event #0
[debug:virtual void mctools::g4::event_action::BeginOfEventAction(const G4Event*):230] Record PRNG states for event #0
[debug:virtual void mctools::g4::event_action::EndOfEventAction(const G4Event*):269] Event #0 is killed and thus not tracked!
[debug:virtual void mctools::g4::event_action::EndOfEventAction(const G4Event*):306] Event data #0
[debug:virtual void mctools::g4::event_action::EndOfEventAction(const G4Event*):307] Save this event = 0
[debug:virtual void mctools::g4::event_action::BeginOfEventAction(const G4Event*):192] Event #1 starts.
...

bxdpp_processing:

...
 *** Break *** segmentation violation
...

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

Thread 2 (Thread 0x7f210b156700 (LWP 25228)):
#0  0x00007f21316176c2 in __GI___waitpid (pid=25231, stat_loc=stat_loc
entry=0x7f210b149668, options=options
entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:30
#1  0x00007f2131582067 in do_system (line=<optimized out>) at ../sysdeps/posix/system.c:149
#2  0x00007f212fea7f83 in TUnixSystem::StackTrace() () from /scratch/ubuntu18.04/BxInstall/root-6.16.00/lib/root/libCore.so.6.16
#3  0x00007f212feaa974 in TUnixSystem::DispatchSignals(ESignals) () from /scratch/ubuntu18.04/BxInstall/root-6.16.00/lib/root/libCore.so.6.16
#4  <signal handler called>
#5  0x00007f211d851e78 in G4HCofThisEvent::AddHitsCollection(int, G4VHitsCollection*) () from /scratch/ubuntu18.04/BxInstall/geant4-10.5/lib/libG4digits_hits.so
#6  0x00007f2124eaefd6 in mctools::g4::event_action::_clear_hits_collections_(G4Event const*) () from /home/mauger/Documents/Private/Software/BxCppDev/Bayeux/Bayeux.git/_install.d/develop-boost169-g4/bin/../lib/../lib/libBayeux_mctools_geant4.so
#7  0x00007f2124eb3e95 in mctools::g4::event_action::EndOfEventAction(G4Event const*) () from /home/mauger/Documents/Private/Software/BxCppDev/Bayeux/Bayeux.git/_install.d/develop-boost169-g4/bin/../lib/../lib/libBayeux_mctools_geant4.so
#8  0x00007f212226e202 in G4EventManager::DoProcessing(G4Event*) () from /scratch/ubuntu18.04/BxInstall/geant4-10.5/lib/libG4event.so
#9  0x00007f212250a9a5 in G4RunManager::ProcessOneEvent(int) () from /scratch/ubuntu18.04/BxInstall/geant4-10.5/lib/libG4run.so
#10 0x00007f2122508acb in G4RunManager::BeamOn(int, char const*, int) () from /scratch/ubuntu18.04/BxInstall/geant4-10.5/lib/libG4run.so
#11 0x00007f2122526db3 in G4RunMessenger::SetNewValue(G4UIcommand*, G4String) () from /scratch/ubuntu18.04/BxInstall/geant4-10.5/lib/libG4run.so
#12 0x00007f211c8d115b in G4UIcommand::DoIt(G4String) () from /scratch/ubuntu18.04/BxInstall/geant4-10.5/lib/libG4intercoms.so
#13 0x00007f211c8f124f in G4UImanager::ApplyCommand(char const*) () from /scratch/ubuntu18.04/BxInstall/geant4-10.5/lib/libG4intercoms.so
#14 0x00007f2124e8da14 in mctools::g4::manager::run_simulation_impl() () from /home/mauger/Documents/Private/Software/BxCppDev/Bayeux/Bayeux.git/_install.d/develop-boost169-g4/bin/../lib/../lib/libBayeux_mctools_geant4.so
#15 0x00007f2124e89586 in mctools::g4::manager::run_simulation() () from /home/mauger/Documents/Private/Software/BxCppDev/Bayeux/Bayeux.git/_install.d/develop-boost169-g4/bin/../lib/../lib/libBayeux_mctools_geant4.so
#16 0x00007f2124e70214 in mctools::g4::simulation_ctrl::start_simulation_run() () from /home/mauger/Documents/Private/Software/BxCppDev/Bayeux/Bayeux.git/_install.d/develop-boost169-g4/bin/../lib/../lib/libBayeux_mctools_geant4.so
#17 0x00007f21234dffba in thread_proxy () from /scratch/ubuntu18.04/BxInstall/boost-1.69.0/lib/libboost_thread.so.1.69.0
#18 0x00007f212e3826db in start_thread (arg=0x7f210b156700) at pthread_create.c:463
#19 0x00007f213165488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f2133f81d80 (LWP 25210)):
#0  0x00007f212e3889f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559377e0d6e0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x559377e0d690, cond=0x559377e0d6b8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x559377e0d6b8, mutex=0x559377e0d690) at pthread_cond_wait.c:655
#3  0x00007f2124ef8078 in mctools::g4::simulation_module::_simulate_event(datatools::things&) () from /home/mauger/Documents/Private/Software/BxCppDev/Bayeux/Bayeux.git/_install.d/develop-boost169-g4/bin/../lib/../lib/libBayeux_mctools_geant4.so
#4  0x00007f2124ef8e1a in mctools::g4::simulation_module::process(datatools::things&) () from /home/mauger/Documents/Private/Software/BxCppDev/Bayeux/Bayeux.git/_install.d/develop-boost169-g4/bin/../lib/../lib/libBayeux_mctools_geant4.so
#5  0x00007f21330a997f in dpp::dpp_driver::run() () from /home/mauger/Documents/Private/Software/BxCppDev/Bayeux/Bayeux.git/_install.d/develop-boost169-g4/bin/../lib/libBayeux.so.3
#6  0x0000559376d9b7cd in main ()
===========================================================

BxCppDev / Bayeux

bxdpp_processing failed for some mctools examples with preliminary support for sequential G4 10.5 #43