Problem 517

Summary:	Bug in G4DecayStrongResonances.Propagate_KineticTrackVector
Product:	Geant4	Reporter:	t.todorov
Component:	processes/hadronic	Assignee:	Hans-Peter.Wellisch
Status:	CLOSED FIXED
Severity:	major
Priority:	P2
Version:	5.2
Hardware:	PC
OS:	Linux
URL:	https://savannah.cern.ch/bugs/?func=detailbug&bug_id=1158&group_id=21

Description t.todorov 2003-07-28 04:31:12 CEST

Problem originally reported in savannah for OSCAR, see URL below.
The problem occurs about once in 3000 full CMS QCD events, but also in
single electron events.
Crash with SEGV signal, stack dump extract:

0x427d609d
_ZN23G4DecayStrongResonances9PropagateEP20G4KineticTrackVectorP12G4V3DNucleus +
0x161 [/afs/cern.ch/
sw/geant4/releases/specific/redhat73/gcc-3.2/geant4.5.2/lib/libG4hadronic_HE_gen.so]
0x427d581b _ZN17G4TheoFSGenerator13ApplyYourselfERK7G4TrackR9G4Nucleus + 0x14b
[/afs/cern.ch/sw/geant4/releases
/specific/redhat73/gcc-3.2/geant4.5.2/lib/libG4hadronic_HE_gen.so]
0x430d3f95 _ZN17G4HadronicProcess19GeneralPostStepDoItERK7G4TrackRK6G4Step +
0x241 [/afs/cern.ch/sw/geant4/rele
ases/specific/redhat73/gcc-3.2/geant4.5.2/lib/libG4hadronic_mgt.so]
0x402cf32c _ZN24G4HadronInelasticProcess12PostStepDoItERK7G4TrackRK6G4Step +
0x5c [/afs/cern.ch/cms/Releases/OS
CAR/prerelease/OSCAR_2_3_0_pre5/lib/Linux__2.4/libMantisG4PhysicsLists.s]

Comment 1 Hans-Peter.Wellisch 2003-07-31 06:06:59 CEST

Hi, non trivial. Since it is seen in single electron events, I suspect it will
be electro or gamma nuclear reactions. To reproduce it, I would need to know
what was the energy of the single electrons, and what was the physics list used?

Man greetings,

Hans-Peter.

Comment 2 Hans-Peter.Wellisch 2003-08-18 02:39:59 CEST

fixed and verified by cms. Proposed for patch.