in tier0 reco tasks 687725 687699 687678 there is a high fraction of crashes. one gets 
caught signal 11(segmentation fault)

and a starck trace leading to this code:
trk::globalchi2fitter::fit
rec::outwardscombinedmuontrackbuilder::fit
rec::outwardscombinedmuontrackbuilder::combinedfit
rec::muidmatchmaker::indetextension

a few examples of logs:

https://atlas-tz-monitoring.cern.ch/request.py/transformlogfile?logfilepath=http%3a%2f%2fatlas.web.cern.ch%2fatlas%2ftzero%2fprod1%2flog1%2f14882%2f14882647_data11_cos.00193025.physics_idcosmic.merge.raw.x165.recon.task._lb0008._sfo-all._0001.job.3%2f14882647_data11_cos.00193025.physics_idcosmic.merge.raw.x165.recon.task._lb0008._sfo-all._0001.job.3.log

https://atlas-tz-monitoring.cern.ch/request.py/transformlogfile?logfilepath=http%3a%2f%2fatlas.web.cern.ch%2fatlas%2ftzero%2fprod1%2flog2%2f14881%2f14881572_data11_cos.00193024.physics_idcosmic.merge.raw.x165.recon.task._lb0031._sfo-all._0001.job.2%2f14881572_data11_cos.00193024.physics_idcosmic.merge.raw.x165.recon.task._lb0031._sfo-all._0001.job.2.log

https://atlas-tz-monitoring.cern.ch/request.py/transformlogfile?logfilepath=http%3a%2f%2fatlas.web.cern.ch%2fatlas%2ftzero%2fprod1%2flog1%2f14881%2f14881571_data11_cos.00193024.physics_idcosmic.merge.raw.x165.recon.task._lb0030._sfo-all._0001.job.3%2f14881571_data11_cos.00193024.physics_idcosmic.merge.raw.x165.recon.task._lb0030._sfo-all._0001.job.3.log

https://atlas-tz-monitoring.cern.ch/request.py/transformlogfile?logfilepath=http%3a%2f%2fatlas.web.cern.ch%2fatlas%2ftzero%2fprod1%2flog1%2f14883%2f14883635_data11_cos.00193026.physics_idcosmic.merge.raw.x165.recon.task._lb0016._sfo-all._0001.job.3%2f14883635_data11_cos.00193026.physics_idcosmic.merge.raw.x165.recon.task._lb0016._sfo-all._0001.job.3.log

