This is the entire stack trace of all threads: =========================================================== Thread 2 (Thread 0x7fc35de1c700 (LWP 17449)): #0 0x00007fc37bf43adb in do_futex_wait.constprop () from /lib64/libpthread.so.0 #1 0x00007fc37bf43b6f in __new_sem_wait_slow.constprop.0 () from /lib64/libpthread.so.0 #2 0x00007fc37bf43c0b in sem_wait GLIBC_2.2.5 () from /lib64/libpthread.so.0 #3 0x00007fc37c288a88 in PyThread_acquire_lock (lock=lock entry=0x2461000, waitflag=waitflag entry=1) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/thread_pthread.h:324 #4 0x00007fc37c2477a6 in PyEval_RestoreThread (tstate=tstate entry=0x58f3b10) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:359 #5 0x00007fc360244546 in floatsleep (secs=) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Modules/timemodule.c:1057 #6 time_sleep (self=, args=) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Modules/timemodule.c:206 #7 0x00007fc37c25141b in call_function (oparg=, pp_stack=0x7fc35de1b5d8) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:4372 #8 PyEval_EvalFrameEx (f=f entry=0x7fc36022b9b0, throwflag=throwflag entry=0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3009 #9 0x00007fc37c252022 in PyEval_EvalCodeEx (co=, globals=, locals=locals entry=0x0, args=args entry=0x7fc362d6b0e8, argcount=, kws=kws entry=0x7fc37c701068, kwcount=0, defs=0x0, defcount=0, closure=0x0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3604 #10 0x00007fc37c1cb944 in function_call (func=0x7fc363844f50, arg=0x7fc362d6b0d0, kw=0x7fc35de46a28) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Objects/funcobject.c:523 #11 0x00007fc37c1a20f3 in PyObject_Call (func=func entry=0x7fc363844f50, arg=arg entry=0x7fc362d6b0d0, kw=kw entry=0x7fc35de46a28) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Objects/abstract.c:2547 #12 0x00007fc37c2493fd in ext_do_call (nk=, na=, flags=, pp_stack=0x7fc35de1b850, func=0x7fc363844f50) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:4686 #13 PyEval_EvalFrameEx (f=f entry=0x7fc35de2e5a8, throwflag=throwflag entry=0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3048 #14 0x00007fc37c24fe3f in fast_function (nk=, na=, n=1, pp_stack=0x7fc35de1b958, func=0x7fc35e3cd7d0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:4457 #15 call_function (oparg=, pp_stack=0x7fc35de1b958) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:4392 #16 PyEval_EvalFrameEx (f=f entry=0x7fc358000910, throwflag=throwflag entry=0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3009 #17 0x00007fc37c24fe3f in fast_function (nk=, na=, n=1, pp_stack=0x7fc35de1ba68, func=0x7fc35e3cd938) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:4457 #18 call_function (oparg=, pp_stack=0x7fc35de1ba68) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:4392 #19 PyEval_EvalFrameEx (f=f entry=0x7fc35de30c90, throwflag=throwflag entry=0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3009 #20 0x00007fc37c252022 in PyEval_EvalCodeEx (co=, globals=, locals=locals entry=0x0, args=args entry=0x7fc362d5bca8, argcount=, kws=kws entry=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3604 #21 0x00007fc37c1cb87b in function_call (func=0x7fc35e3cd848, arg=0x7fc362d5bc90, kw=0x0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Objects/funcobject.c:523 #22 0x00007fc37c1a20f3 in PyObject_Call (func=func entry=0x7fc35e3cd848, arg=arg entry=0x7fc362d5bc90, kw=kw entry=0x0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Objects/abstract.c:2547 #23 0x00007fc37c1affdc in instancemethod_call (func=0x7fc35e3cd848, arg=0x7fc362d5bc90, kw=0x0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Objects/classobject.c:2600 #24 0x00007fc37c1a20f3 in PyObject_Call (func=func entry=0x7fc37c5c4cd0, arg=arg entry=0x7fc37c701050, kw=0x0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Objects/abstract.c:2547 #25 0x00007fc37c247e53 in PyEval_CallObjectWithKeywords (func=0x7fc37c5c4cd0, arg=0x7fc37c701050, kw=) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:4241 #26 0x00007fc37c28d3b2 in t_bootstrap (boot_raw=0x58e3df0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Modules/threadmodule.c:620 #27 0x00007fc37bf3ddd5 in start_thread () from /lib64/libpthread.so.0 #28 0x00007fc37b55e02d in clone () from /lib64/libc.so.6 Thread 1 (Thread 0x7fc37c741740 (LWP 17413)): #0 0x00007fc37b524c09 in waitpid () from /lib64/libc.so.6 #1 0x00007fc37b4a2ea2 in do_system () from /lib64/libc.so.6 #2 0x00007fc37b4a3251 in system () from /lib64/libc.so.6 #3 0x00007fc372974713 in TUnixSystem::StackTrace() () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libCore.so #4 0x00007fc372976fe4 in TUnixSystem::DispatchSignals(ESignals) () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libCore.so #5 #6 0x00007fc353ae8daf in ROOT::Minuit2::VariableMetricBuilder::Minimum(ROOT::Minuit2::MnFcn const&, ROOT::Minuit2::GradientCalculator const&, ROOT::Minuit2::MinimumSeed const&, std::vector >&, unsigned int, double) const () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #7 0x00007fc353aec206 in ROOT::Minuit2::VariableMetricBuilder::Minimum(ROOT::Minuit2::MnFcn const&, ROOT::Minuit2::GradientCalculator const&, ROOT::Minuit2::MinimumSeed const&, ROOT::Minuit2::MnStrategy const&, unsigned int, double) const () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #8 0x00007fc353ad8af0 in ROOT::Minuit2::ModularFunctionMinimizer::Minimize(ROOT::Minuit2::MnFcn const&, ROOT::Minuit2::GradientCalculator const&, ROOT::Minuit2::MinimumSeed const&, ROOT::Minuit2::MnStrategy const&, unsigned int, double) const () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #9 0x00007fc353ad7bfc in ROOT::Minuit2::ModularFunctionMinimizer::Minimize(ROOT::Minuit2::FCNBase const&, ROOT::Minuit2::MnUserParameterState const&, ROOT::Minuit2::MnStrategy const&, unsigned int, double) const () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #10 0x00007fc353aa8d83 in ROOT::Minuit2::MnApplication::operator()(unsigned int, double) () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #11 0x00007fc343482133 in call_mnapplication_wrapper (tol=, i=10000, app=...) at iminuit/Utils.h:34 #12 __pyx_pf_7iminuit_11_libiminuit_6Minuit_4migrad (__pyx_v_self=0xd715a50, __pyx_v_ncall=, __pyx_v_resume=, __pyx_v_nsplit=, __pyx_v_precision=) at iminuit/_libiminuit.cpp:11275 #13 0x00007fc343483c21 in __pyx_pw_7iminuit_11_libiminuit_6Minuit_5migrad (__pyx_v_self=0xd715a50, __pyx_args=, __pyx_kwds=) at iminuit/_libiminuit.cpp:10762 #14 0x00007fc37c25141b in call_function (oparg=, pp_stack=0x7fff1da94238) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:4372 #15 PyEval_EvalFrameEx (f=f entry=0x7fc37c6d2c50, throwflag=throwflag entry=0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3009 #16 0x00007fc37c252022 in PyEval_EvalCodeEx (co=co entry=0x7fc37c679c30, globals=globals entry=0x7fc37c6d6168, locals=locals entry=0x7fc37c6d6168, args=args entry=0x0, argcount=argcount entry=0, kws=kws entry=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3604 #17 0x00007fc37c2522b9 in PyEval_EvalCode (co=co entry=0x7fc37c679c30, globals=globals entry=0x7fc37c6d6168, locals=locals entry=0x7fc37c6d6168) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:669 #18 0x00007fc37c27691a in run_mod (arena=0x233c670, flags=0x7fff1da9447c, locals=0x7fc37c6d6168, globals=0x7fc37c6d6168, filename=0x7fc37c679c30 "\002", mod=) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/pythonrun.c:1385 #19 PyRun_FileExFlags (fp=fp entry=0x234f770, filename=filename entry=0x7fff1da95529 "./AlignmentScripts/ApAptFitterU1S_IT_iMinuit_New.py", start=start entry=257, globals=globals entry=0x7fc37c6d6168, locals=locals entry=0x7fc37c6d6168, closeit=closeit entry=1, flags=0x7fff1da9447c) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/pythonrun.c:1371 #20 0x00007fc37c2778b3 in PyRun_SimpleFileExFlags (fp=fp entry=0x234f770, filename=0x7fff1da95529 "./AlignmentScripts/ApAptFitterU1S_IT_iMinuit_New.py", closeit=closeit entry=1, flags=flags entry=0x7fff1da9447c) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/pythonrun.c:957 #21 0x00007fc37c277f23 in PyRun_AnyFileExFlags (fp=fp entry=0x234f770, filename=, closeit=closeit entry=1, flags=flags entry=0x7fff1da9447c) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/pythonrun.c:761 #22 0x00007fc37c28b4fa in Py_Main (argc=, argv=) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Modules/main.c:641 #23 0x00007fc37b482495 in __libc_start_main () from /lib64/libc.so.6 #24 0x00000000004006be in _start () =========================================================== The lines below might hint at the cause of the crash. You may get help by asking at the ROOT forum http://root.cern.ch/forum Only if you are really convinced it is a bug in ROOT then please submit a 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. =========================================================== #6 0x00007fc353ae8daf in ROOT::Minuit2::VariableMetricBuilder::Minimum(ROOT::Minuit2::MnFcn const&, ROOT::Minuit2::GradientCalculator const&, ROOT::Minuit2::MinimumSeed const&, std::vector >&, unsigned int, double) const () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #7 0x00007fc353aec206 in ROOT::Minuit2::VariableMetricBuilder::Minimum(ROOT::Minuit2::MnFcn const&, ROOT::Minuit2::GradientCalculator const&, ROOT::Minuit2::MinimumSeed const&, ROOT::Minuit2::MnStrategy const&, unsigned int, double) const () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #8 0x00007fc353ad8af0 in ROOT::Minuit2::ModularFunctionMinimizer::Minimize(ROOT::Minuit2::MnFcn const&, ROOT::Minuit2::GradientCalculator const&, ROOT::Minuit2::MinimumSeed const&, ROOT::Minuit2::MnStrategy const&, unsigned int, double) const () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #9 0x00007fc353ad7bfc in ROOT::Minuit2::ModularFunctionMinimizer::Minimize(ROOT::Minuit2::FCNBase const&, ROOT::Minuit2::MnUserParameterState const&, ROOT::Minuit2::MnStrategy const&, unsigned int, double) const () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #10 0x00007fc353aa8d83 in ROOT::Minuit2::MnApplication::operator()(unsigned int, double) () from /cvmfs/sft.cern.ch/lcg/views/LCG_95a/x86_64-centos7-gcc8-opt/lib/libMinuit2.so #11 0x00007fc343482133 in call_mnapplication_wrapper (tol=, i=10000, app=...) at iminuit/Utils.h:34 #12 __pyx_pf_7iminuit_11_libiminuit_6Minuit_4migrad (__pyx_v_self=0xd715a50, __pyx_v_ncall=, __pyx_v_resume=, __pyx_v_nsplit=, __pyx_v_precision=) at iminuit/_libiminuit.cpp:11275 #13 0x00007fc343483c21 in __pyx_pw_7iminuit_11_libiminuit_6Minuit_5migrad (__pyx_v_self=0xd715a50, __pyx_args=, __pyx_kwds=) at iminuit/_libiminuit.cpp:10762 #14 0x00007fc37c25141b in call_function (oparg=, pp_stack=0x7fff1da94238) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:4372 #15 PyEval_EvalFrameEx (f=f entry=0x7fc37c6d2c50, throwflag=throwflag entry=0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3009 #16 0x00007fc37c252022 in PyEval_EvalCodeEx (co=co entry=0x7fc37c679c30, globals=globals entry=0x7fc37c6d6168, locals=locals entry=0x7fc37c6d6168, args=args entry=0x0, argcount=argcount entry=0, kws=kws entry=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:3604 #17 0x00007fc37c2522b9 in PyEval_EvalCode (co=co entry=0x7fc37c679c30, globals=globals entry=0x7fc37c6d6168, locals=locals entry=0x7fc37c6d6168) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/ceval.c:669 #18 0x00007fc37c27691a in run_mod (arena=0x233c670, flags=0x7fff1da9447c, locals=0x7fc37c6d6168, globals=0x7fc37c6d6168, filename=0x7fc37c679c30 "002", mod=) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/pythonrun.c:1385 #19 PyRun_FileExFlags (fp=fp entry=0x234f770, filename=filename entry=0x7fff1da95529 "./AlignmentScripts/ApAptFitterU1S_IT_iMinuit_New.py", start=start entry=257, globals=globals entry=0x7fc37c6d6168, locals=locals entry=0x7fc37c6d6168, closeit=closeit entry=1, flags=0x7fff1da9447c) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/pythonrun.c:1371 #20 0x00007fc37c2778b3 in PyRun_SimpleFileExFlags (fp=fp entry=0x234f770, filename=0x7fff1da95529 "./AlignmentScripts/ApAptFitterU1S_IT_iMinuit_New.py", closeit=closeit entry=1, flags=flags entry=0x7fff1da9447c) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/pythonrun.c:957 #21 0x00007fc37c277f23 in PyRun_AnyFileExFlags (fp=fp entry=0x234f770, filename=, closeit=closeit entry=1, flags=flags entry=0x7fff1da9447c) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Python/pythonrun.c:761 #22 0x00007fc37c28b4fa in Py_Main (argc=, argv=) at /mnt/build/jenkins/workspace/lcg_release_tar/BUILDTYPE/Release/COMPILER/gcc8binutils/LABEL/centos7/build/externals/Python-2.7.15/src/Python/2.7.15/Modules/main.c:641 #23 0x00007fc37b482495 in __libc_start_main () from /lib64/libc.so.6 #24 0x00000000004006be in _start () ===========================================================