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Not on the first event, but after 10 or so.


The analysis linked with the same libraries works on an old DST made from the same binary (June 1), but after rerunning the DST maker on the recon used to make it originally, that new DST no longer works.


So probably not from a recent recon problem.


At first I thought it could be due to the new 2016 MC recon steering file I was testing, so I tried it on recon that definitely did not use it.




From: Omar Moreno <[log in to unmask]>
Sent: Thursday, July 20, 2017 7:25:12 PM
To: Bradley T Yale
Cc: [log in to unmask]
Subject: Re: DST crash
 
Does this happen on the first event? This seems to point to an issue with the recon.

On Thu, Jul 20, 2017 at 4:09 PM, Bradley T Yale <[log in to unmask]> wrote:

Hi,

When analyzing recent files made from the DST maker in either of these places:

/u/group/hps/hps_soft/hps-dst/centos7-64/bin/dst_maker
/u/group/hps/hps_soft/hps-dst/build_new/bin/dst_maker

It causes a crash when getMomentum() or getCharge() is called on an SvtTrack object:

===========================================================
There was a crash.
This is the entire stack trace of all threads:
===========================================================
#0  0x00007efc2a30203c in waitpid () from /lib64/libc.so.6
#1  0x00007efc2a287092 in do_system () from /lib64/libc.so.6
#2  0x00007efc2ed64949 in TUnixSystem::StackTrace (this=0x16970c0) at /apps/root/5.34.36/root/core/unix/src/TUnixSystem.cxx:2419
#3  0x00007efc2ed6658c in TUnixSystem::DispatchSignals (this=0x16970c0, sig=kSigSegmentationViolation) at /apps/root/5.34.36/root/core/unix/src/TUnixSystem.cxx:1294
#4  <signal handler called>
#5  HpsParticle::getMomentum (this=0x0) at /home/hps/hps_soft/hps-dst/hps-dst/src/hps_event/HpsParticle.cxx:164
#6  0x00007efc2f4f8bfe in SvtTrack::getMomentum (this=0x28c3570) at /home/hps/hps_soft/hps-dst/hps-dst/src/hps_event/SvtTrack.cxx:127
#7  0x00000000004078ec in main ()
===========================================================


The lines below might hint at the cause of the crash.
If they do not help you then please submit a bug report at
http://root.cern.ch/bugs. Please post the ENTIRE stack trace
from above as an attachment in addition to anything else
that might help us fixing this issue.
===========================================================
#5  HpsParticle::getMomentum (this=0x0) at /home/hps/hps_soft/hps-dst/hps-dst/src/hps_event/HpsParticle.cxx:164
#6  0x00007efc2f4f8bfe in SvtTrack::getMomentum (this=0x28c3570) at /home/hps/hps_soft/hps-dst/hps-dst/src/hps_event/SvtTrack.cxx:127
#7  0x00000000004078ec in main ()
===========================================================



The culprit seems to be this part of the code in SvtTrack.cxx:


int SvtTrack::getBlah() {
    if (fs_particle == NULL) return 9999;
    return ((HpsParticle*) this->fs_particle.GetObject())->getBlah();
}


Files that were made around June 1 with the same DST maker work fine.

Did something change since then?


-Bradley





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