pyROOT legend not showing up

Dyson_Kennedy · November 22, 2024, 9:53pm

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_ROOT Version: 6.32.08
Platform: ubuntu 20.04
Compiler: g++ 13.2.0

Hello,
I have this file which finds some .root histograms and slams them together into a THStack. I can’t seem to get the legend to show up either using TLegend or gPad.BuildLegend(). I checked out this post, but it seems the issue there was an outdated ROOT version that required an input location for the legend.

Here is the file

def combineHistos(start_dir=init_dir):

    eventTypes = ['LNVF', 'ZZ2j', 'WZ2j', 'ttbar', 'W3j']
    Stack = ROOT.THStack('WjPair', 'Inv_Mass_2Jets_close_to_W')
    # ROOT.gStyle.SetPalette(ROOT.kOcean)
    Files = []
    for typ in eventTypes:
        # print(type(typ))
        # print(type(init_dir))
        filepath = init_dir+typ+'/plots/Mass_2jW.root'
        Files.append(ROOT.TFile.Open(filepath))
    
    LNVHisto = Files[0].Get('Inv_Mass_2Jets_close_to_W')
    LNVHisto.SetFillColor(ROOT.kRed)
    LNVHisto.SetLineColor(ROOT.kBlack)
    LNVHisto.SetStats(0)
    ZZHisto = Files[1].Get('Inv_Mass_2Jets_close_to_W')
    ZZHisto.SetFillColor(ROOT.kGreen+1)
    ZZHisto.SetLineColor(ROOT.kBlack)
    ZZHisto.SetStats(0)
    WZHisto = Files[2].Get('Inv_Mass_2Jets_close_to_W')
    WZHisto.SetFillColor(ROOT.kGreen+3)
    WZHisto.SetLineColor(ROOT.kBlack)
    WZHisto.SetStats(0)
    ttbarHisto = Files[3].Get('Inv_Mass_2Jets_close_to_W')
    ttbarHisto.SetFillColor(ROOT.kBlue)
    ttbarHisto.SetLineColor(ROOT.kBlack)
    ttbarHisto.SetStats(0)
    W3Histo = Files[4].Get('Inv_Mass_2Jets_close_to_W')
    W3Histo.SetFillColor(ROOT.kCyan)
    W3Histo.SetLineColor(ROOT.kBlack)
    W3Histo.SetStats(0)
    print("i have it")


    Stack.Add(LNVHisto)
    Stack.Add(ZZHisto)
    Stack.Add(WZHisto)
    Stack.Add(ttbarHisto)
    Stack.Add(W3Histo)
    print("I added them")

    legend = ROOT.TLegend(0.7,0.7,0.9,0.9)
    legend.AddEntry(LNVHisto, "signal", "l")
    legend.AddEntry(ZZHisto, "Diboson: ZZ2j", 'l')
    legend.AddEntry(WZHisto, "Diboson: WZ2j", 'l')
    legend.AddEntry(ttbarHisto, "JetFake: ttbar", "l")
    legend.AddEntry(W3Histo, "JetFake: W+3j", 'l')
    

    can = ROOT.TCanvas('Canvas')
    can.cd()
    Stack.Draw()
    legend.Draw()
    ROOT.gPad.BuildLegend()
    Stack.GetXaxis().SetTitle("#Delta m_{jj} (GeV)")

    can.Print(init_dir+'/plots/stackTest.png')

    Stack.SaveAs(init_dir+'/plots/stackTest.root')


    return Stack

yus · November 22, 2024, 10:37pm

Hi,
it looks exactly like Legend not drawn from function in PyRoot

Dyson_Kennedy · November 25, 2024, 9:42pm

Hi,
Thanks for your help, I hadn’t seen this post.
When I try to implement similarly I get an issue with saving the histograms.

Here is the current code:

import ROOT

init_dir = '/work/pi_mjrm_umass_edu/LNV_collider/AnalysisOutput/'

def combineHistos(start_dir=init_dir):

    eventTypes = ['LNVF', 'ZZ2j', 'WZ2j', 'ttbar', 'W3j']
    Stack = ROOT.THStack('WjPair', 'Inv_Mass_2Jets_close_to_W')
    # ROOT.gStyle.SetPalette(ROOT.kOcean)
    Files = []
    for typ in eventTypes:
        # print(type(typ))
        # print(type(init_dir))
        filepath = init_dir+typ+'/plots/Mass_2jW.root'
        Files.append(ROOT.TFile.Open(filepath))
    
    LNVHisto = Files[0].Get('Inv_Mass_2Jets_close_to_W')
    LNVHisto.SetFillColor(ROOT.kRed)
    LNVHisto.SetLineColor(ROOT.kBlack)
    LNVHisto.SetStats(0)
    ZZHisto = Files[1].Get('Inv_Mass_2Jets_close_to_W')
    ZZHisto.SetFillColor(ROOT.kGreen+1)
    ZZHisto.SetLineColor(ROOT.kBlack)
    ZZHisto.SetStats(0)
    WZHisto = Files[2].Get('Inv_Mass_2Jets_close_to_W')
    WZHisto.SetFillColor(ROOT.kGreen+3)
    WZHisto.SetLineColor(ROOT.kBlack)
    WZHisto.SetStats(0)
    ttbarHisto = Files[3].Get('Inv_Mass_2Jets_close_to_W')
    ttbarHisto.SetFillColor(ROOT.kBlue)
    ttbarHisto.SetLineColor(ROOT.kBlack)
    ttbarHisto.SetStats(0)
    W3Histo = Files[4].Get('Inv_Mass_2Jets_close_to_W')
    W3Histo.SetFillColor(ROOT.kCyan)
    W3Histo.SetLineColor(ROOT.kBlack)
    W3Histo.SetStats(0)
    print("i have it")


    Stack.Add(LNVHisto)
    Stack.Add(ZZHisto)
    Stack.Add(WZHisto)
    Stack.Add(ttbarHisto)
    Stack.Add(W3Histo)
    print("I added them")

    legend = ROOT.TLegend(0.7,0.7,0.9,0.9)
    legend.AddEntry(LNVHisto, "signal", "l")
    legend.AddEntry(ZZHisto, "Diboson: ZZ2j", 'l')
    legend.AddEntry(WZHisto, "Diboson: WZ2j", 'l')
    legend.AddEntry(ttbarHisto, "JetFake: ttbar", "l")
    legend.AddEntry(W3Histo, "JetFake: W+3j", 'l')
    

    # can = ROOT.TCanvas('Canvas')
    # can.cd()
    # Stack.Draw()
    # legend.Draw()
    # ROOT.gPad.BuildLegend()
    # Stack.GetXaxis().SetTitle("#Delta m_{jj} (GeV)")

    # can.Print(init_dir+'/plots/stackTest.png')

    # Stack.SaveAs(init_dir+'/plots/stackTest.root')


    return legend, Stack


if __name__=='__main__':
    
    eventTypes = ['LNVF', 'ZZ2j', 'WZ2j', 'ttbar', 'W3j']
    leg, stack = combineHistos(eventTypes)

    
    can = ROOT.TCanvas('Canvas')
    can.cd()
    stack.Draw()
    leg.Draw()

    can.Print(init_dir+'/plots/stackTest.png')

    stack.SaveAs(init_dir+'plots/stackTest.root')

This produces a segmentation fault

*** Break *** segmentation violation



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

Thread 2 (Thread 0x786b408006c0 (LWP 122751) "python3"):
#0  0x0000786b50698d61 in __futex_abstimed_wait_common64 (private=40025, cancel=true, abstime=0x786b407ff9b0, op=137, expected=0, futex_word=0x786b50eb6710 <_PyRuntime+432>) at ./nptl/futex-internal.c:57
#1  __futex_abstimed_wait_common (cancel=true, private=40025, abstime=0x786b407ff9b0, clockid=22069, expected=0, futex_word=0x786b50eb6710 <_PyRuntime+432>) at ./nptl/futex-internal.c:87
#2  __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word
entry=0x786b50eb6710 <_PyRuntime+432>, expected=expected
entry=0, clockid=clockid
entry=1, abstime=abstime
entry=0x786b407ff9b0, private=private
entry=0) at ./nptl/futex-internal.c:139
#3  0x0000786b5069bc7e in __pthread_cond_wait_common (abstime=0x786b407ff9b0, clockid=1, mutex=0x786b50eb6718 <_PyRuntime+440>, cond=0x786b50eb66e8 <_PyRuntime+392>) at ./nptl/pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=cond
entry=0x786b50eb66e8 <_PyRuntime+392>, mutex=mutex
entry=0x786b50eb6718 <_PyRuntime+440>, abstime=abstime
entry=0x786b407ff9b0) at ./nptl/pthread_cond_wait.c:652
#5  0x0000786b50bacabf in PyCOND_TIMEDWAIT (us=<optimized out>, mut=0x786b50eb6718 <_PyRuntime+440>, cond=0x786b50eb66e8 <_PyRuntime+392>) at Python/condvar.h:73
#6  take_gil (tstate=tstate
entry=0x5635d3946cb0) at Python/ceval_gil.h:231
#7  0x0000786b50bacfc2 in PyEval_RestoreThread (tstate=tstate
entry=0x5635d3946cb0) at Python/ceval.c:521
#8  0x0000786b50c7e1a4 in pysleep (timeout=<optimized out>) at ./Modules/timemodule.c:2168
#9  time_sleep (self=<optimized out>, timeout_obj=<optimized out>) at ./Modules/timemodule.c:383
#10 0x0000786b50afe2d6 in cfunction_vectorcall_O (func=0x786b501a7470, args=0x786b40f7c1e8, nargsf=<optimized out>, kwnames=<optimized out>) at Objects/methodobject.c:514
#11 0x0000786b50aab287 in _PyObject_VectorcallTstate (kwnames=0xf1, nargsf=<optimized out>, args=0x786b40f7c1e8, callable=0x786b501a7470, tstate=0x5635d3946cb0) at ./Include/internal/pycore_call.h:92
#12 PyObject_Vectorcall (callable=callable
entry=0x786b501a7470, args=args
entry=0x786b40f7c1e8, nargsf=<optimized out>, kwnames=kwnames
entry=0x0) at Objects/call.c:299
#13 0x0000786b50a4ca32 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:4769
#14 0x0000786b50badd58 in _PyEval_EvalFrame (throwflag=0, frame=0x786b40f7c188, tstate=0x5635d3946cb0) at ./Include/internal/pycore_ceval.h:73
#15 _PyEval_Vector (tstate=0x5635d3946cb0, func=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>) at Python/ceval.c:6434
#16 0x0000786b50a4f458 in do_call_core (use_tracing=<optimized out>, kwdict=0x786b501a8240, callargs=0x786b501b99f0, func=0x786b5001d580, tstate=<optimized out>) at Python/ceval.c:7352
#17 _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:5376
#18 0x0000786b50badd58 in _PyEval_EvalFrame (throwflag=0, frame=0x786b40f7c020, tstate=0x5635d3946cb0) at ./Include/internal/pycore_ceval.h:73
#19 _PyEval_Vector (tstate=0x5635d3946cb0, func=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>) at Python/ceval.c:6434
#20 0x0000786b50aadcc4 in _PyObject_VectorcallTstate (kwnames=0x0, nargsf=1, args=0x786b407ffe18, callable=0x786b414e56c0, tstate=0x5635d3946cb0) at ./Include/internal/pycore_call.h:92
#21 method_vectorcall (method=<optimized out>, args=0x786b50ec4b90 <_PyRuntime+58928>, nargsf=<optimized out>, kwnames=0x0) at Objects/classobject.c:67
#22 0x0000786b50c7cb82 in thread_run (boot_raw=0x5635d38c5a70) at ./Modules/_threadmodule.c:1124
#23 0x0000786b50c09ffb in pythread_wrapper (arg=<optimized out>) at Python/thread_pthread.h:241
#24 0x0000786b5069ca94 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
#25 0x0000786b50729c3c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 1 (Thread 0x786b5084fe80 (LWP 122733) "python3"):
#0  0x0000786b507107e3 in __GI___wait4 (pid=122767, stat_loc=stat_loc
entry=0x7fff4a1e8fd8, options=options
entry=0, usage=usage
entry=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:30
#1  0x0000786b507108eb in __GI___waitpid (pid=<optimized out>, stat_loc=stat_loc
entry=0x7fff4a1e8fd8, options=options
entry=0) at ./posix/waitpid.c:38
#2  0x0000786b506585ab in do_system (line=<optimized out>) at ../sysdeps/posix/system.c:172
#3  0x0000786b4fd82a47 in TUnixSystem::StackTrace() () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libCore.so.6.30
#4  0x0000786b505490f3 in (anonymous namespace)::TExceptionHandlerImp::HandleException(int) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy_backend3_11.so.6.30
#5  0x0000786b4fd82209 in TUnixSystem::DispatchSignals(ESignals) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libCore.so.6.30
#6  <signal handler called>
#7  0x0000000000000000 in ?? ()
#8  0x0000786b3f68fa9a in TLegend::PaintPrimitives() () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGraf.so.6.30.06
#9  0x0000786b3f52cea3 in TPad::Paint(char const*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#10 0x0000786b3f5274bc in TPad::Print(char const*, char const*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#11 0x0000786b3f518201 in TPad::SaveAs(char const*, char const*) const () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#12 0x0000786b4081004d in ?? ()
#13 0x00007fff4a1ec6a0 in ?? ()
#14 0x00007fff4a1ec390 in ?? ()
#15 0x00005635d4454790 in ?? ()
#16 0x00000001d4454790 in ?? ()
#17 0x0000000000000001 in ?? ()
#18 0x0000786b50552ed8 in WrapperCall(long, unsigned long, void*, void*, void*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy_backend3_11.so.6.30
#19 0x0000786b4ffa0cc6 in CPyCppyy::(anonymous namespace)::VoidExecutor::Execute(long, void*, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#20 0x0000786b4ff8acbb in CPyCppyy::CPPMethod::ExecuteFast(void*, long, CPyCppyy::CallContext*) [clone .isra.0] () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#21 0x0000786b4ff8e6c8 in CPyCppyy::CPPMethod::ExecuteProtected(void*, long, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#22 0x0000786b4ff8c25d in CPyCppyy::CPPMethod::Execute(void*, long, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#23 0x0000786b4ff8d233 in CPyCppyy::CPPMethod::Call(CPyCppyy::CPPInstance*&, _object*, _object*, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#24 0x0000786b4ff92c3f in CPyCppyy::(anonymous namespace)::mp_call(CPyCppyy::CPPOverload*, _object*, _object*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#25 0x0000786b50aaac41 in _PyObject_MakeTpCall (tstate=0x786b50edef18 <_PyRuntime+166328>, callable=callable
entry=0x786b409aa1a0, args=args
entry=0x786b5093e078, nargs=1, keywords=keywords
entry=0x0) at Objects/call.c:214
#26 0x0000786b50aab2bf in _PyObject_VectorcallTstate (kwnames=0x0, nargsf=<optimized out>, args=0x786b5093e078, callable=0x786b409aa1a0, tstate=<optimized out>) at ./Include/internal/pycore_call.h:90
#27 0x0000786b50a4ca32 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:4769
#28 0x0000786b50badbec in _PyEval_EvalFrame (throwflag=0, frame=0x786b5093e020, tstate=0x786b50edef18 <_PyRuntime+166328>) at ./Include/internal/pycore_ceval.h:73
#29 _PyEval_Vector (args=0x0, argcount=0, kwnames=0x0, locals=0x786b50007840, func=0x786b501d6f20, tstate=0x786b50edef18 <_PyRuntime+166328>) at Python/ceval.c:6434
#30 PyEval_EvalCode (co=co
entry=0x786b50129630, globals=globals
entry=0x786b50007840, locals=locals
entry=0x786b50007840) at Python/ceval.c:1148
#31 0x0000786b50bf8d39 in run_eval_code_obj (locals=0x786b50007840, globals=0x786b50007840, co=0x786b50129630, tstate=0x786b50edef18 <_PyRuntime+166328>) at Python/pythonrun.c:1710
#32 run_mod (mod=<optimized out>, filename=filename
entry=0x786b50196230, globals=globals
entry=0x786b50007840, locals=locals
entry=0x786b50007840, flags=flags
entry=0x7fff4a1ecb58, arena=arena
entry=0x786b5011b8b0) at Python/pythonrun.c:1731
#33 0x0000786b50bfa6ce in pyrun_file (flags=0x7fff4a1ecb58, closeit=1, locals=0x786b50007840, globals=0x786b50007840, start=257, filename=0x786b50196230, fp=<optimized out>) at Python/pythonrun.c:1626
#34 _PyRun_SimpleFileObject (fp=fp
entry=0x5635d0337370, filename=filename
entry=0x786b50196230, closeit=closeit
entry=1, flags=flags
entry=0x7fff4a1ecb58) at Python/pythonrun.c:440
#35 0x0000786b50bfad50 in _PyRun_AnyFileObject (fp=0x5635d0337370, filename=filename
entry=0x786b50196230, closeit=closeit
entry=1, flags=flags
entry=0x7fff4a1ecb58) at Python/pythonrun.c:79
#36 0x0000786b50c1be00 in pymain_run_file_obj (skip_source_first_line=0, filename=0x786b50196230, program_name=0x786b50007a30) at Modules/main.c:360
#37 pymain_run_file (config=0x786b50ec4f60 <_PyRuntime+59904>) at Modules/main.c:379
#38 pymain_run_python (exitcode=0x7fff4a1ecb50) at Modules/main.c:601
#39 Py_RunMain () at Modules/main.c:680
#40 0x0000786b50c1c39e in pymain_main (args=0x7fff4a1ecc70) at Modules/main.c:710
#41 Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:734
#42 0x0000786b5062a1ca in __libc_start_call_main (main=main
entry=0x5635cf706060 <main>, argc=argc
entry=2, argv=argv
entry=0x7fff4a1ece08) at ../sysdeps/nptl/libc_start_call_main.h:58
#43 0x0000786b5062a28b in __libc_start_main_impl (main=0x5635cf706060 <main>, argc=2, argv=0x7fff4a1ece08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff4a1ecdf8) at ../csu/libc-start.c:360
#44 0x00005635cf706095 in _start ()
===========================================================


The lines below might hint at the cause of the crash. If you see question
marks as part of the stack trace, try to recompile with debugging information
enabled and export CLING_DEBUG=1 environment variable before running.
You may get help by asking at the ROOT forum https://root.cern/forum
preferably using the command (.forum bug) in the ROOT prompt.
Only if you are really convinced it is a bug in ROOT then please submit a
report at https://root.cern/bugs or (preferably) using the command (.gh bug) in
the ROOT prompt. Please post the ENTIRE stack trace
from above as an attachment in addition to anything else
that might help us fixing this issue.
===========================================================
#7  0x0000000000000000 in ?? ()
#8  0x0000786b3f68fa9a in TLegend::PaintPrimitives() () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGraf.so.6.30.06
#9  0x0000786b3f52cea3 in TPad::Paint(char const*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#10 0x0000786b3f5274bc in TPad::Print(char const*, char const*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#11 0x0000786b3f518201 in TPad::SaveAs(char const*, char const*) const () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#12 0x0000786b4081004d in ?? ()
#13 0x00007fff4a1ec6a0 in ?? ()
#14 0x00007fff4a1ec390 in ?? ()
#15 0x00005635d4454790 in ?? ()
#16 0x00000001d4454790 in ?? ()
#17 0x0000000000000001 in ?? ()
#18 0x0000786b50552ed8 in WrapperCall(long, unsigned long, void*, void*, void*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy_backend3_11.so.6.30
#19 0x0000786b4ffa0cc6 in CPyCppyy::(anonymous namespace)::VoidExecutor::Execute(long, void*, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#20 0x0000786b4ff8acbb in CPyCppyy::CPPMethod::ExecuteFast(void*, long, CPyCppyy::CallContext*) [clone .isra.0] () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#21 0x0000786b4ff8e6c8 in CPyCppyy::CPPMethod::ExecuteProtected(void*, long, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#22 0x0000786b4ff8c25d in CPyCppyy::CPPMethod::Execute(void*, long, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#23 0x0000786b4ff8d233 in CPyCppyy::CPPMethod::Call(CPyCppyy::CPPInstance*&, _object*, _object*, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#24 0x0000786b4ff92c3f in CPyCppyy::(anonymous namespace)::mp_call(CPyCppyy::CPPOverload*, _object*, _object*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#25 0x0000786b50aaac41 in _PyObject_MakeTpCall (tstate=0x786b50edef18 <_PyRuntime+166328>, callable=callable
entry=0x786b409aa1a0, args=args
entry=0x786b5093e078, nargs=1, keywords=keywords
entry=0x0) at Objects/call.c:214
#26 0x0000786b50aab2bf in _PyObject_VectorcallTstate (kwnames=0x0, nargsf=<optimized out>, args=0x786b5093e078, callable=0x786b409aa1a0, tstate=<optimized out>) at ./Include/internal/pycore_call.h:90
#27 0x0000786b50a4ca32 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:4769
#28 0x0000786b50badbec in _PyEval_EvalFrame (throwflag=0, frame=0x786b5093e020, tstate=0x786b50edef18 <_PyRuntime+166328>) at ./Include/internal/pycore_ceval.h:73
#29 _PyEval_Vector (args=0x0, argcount=0, kwnames=0x0, locals=0x786b50007840, func=0x786b501d6f20, tstate=0x786b50edef18 <_PyRuntime+166328>) at Python/ceval.c:6434
#30 PyEval_EvalCode (co=co
entry=0x786b50129630, globals=globals
entry=0x786b50007840, locals=locals
entry=0x786b50007840) at Python/ceval.c:1148
#31 0x0000786b50bf8d39 in run_eval_code_obj (locals=0x786b50007840, globals=0x786b50007840, co=0x786b50129630, tstate=0x786b50edef18 <_PyRuntime+166328>) at Python/pythonrun.c:1710
#32 run_mod (mod=<optimized out>, filename=filename
entry=0x786b50196230, globals=globals
entry=0x786b50007840, locals=locals
entry=0x786b50007840, flags=flags
entry=0x7fff4a1ecb58, arena=arena
entry=0x786b5011b8b0) at Python/pythonrun.c:1731
#33 0x0000786b50bfa6ce in pyrun_file (flags=0x7fff4a1ecb58, closeit=1, locals=0x786b50007840, globals=0x786b50007840, start=257, filename=0x786b50196230, fp=<optimized out>) at Python/pythonrun.c:1626
#34 _PyRun_SimpleFileObject (fp=fp
entry=0x5635d0337370, filename=filename
entry=0x786b50196230, closeit=closeit
entry=1, flags=flags
entry=0x7fff4a1ecb58) at Python/pythonrun.c:440
#35 0x0000786b50bfad50 in _PyRun_AnyFileObject (fp=0x5635d0337370, filename=filename
entry=0x786b50196230, closeit=closeit
entry=1, flags=flags
entry=0x7fff4a1ecb58) at Python/pythonrun.c:79
#36 0x0000786b50c1be00 in pymain_run_file_obj (skip_source_first_line=0, filename=0x786b50196230, program_name=0x786b50007a30) at Modules/main.c:360
#37 pymain_run_file (config=0x786b50ec4f60 <_PyRuntime+59904>) at Modules/main.c:379
#38 pymain_run_python (exitcode=0x7fff4a1ecb50) at Modules/main.c:601
#39 Py_RunMain () at Modules/main.c:680
#40 0x0000786b50c1c39e in pymain_main (args=0x7fff4a1ecc70) at Modules/main.c:710
#41 Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:734
#42 0x0000786b5062a1ca in __libc_start_call_main (main=main
entry=0x5635cf706060 <main>, argc=argc
entry=2, argv=argv
entry=0x7fff4a1ece08) at ../sysdeps/nptl/libc_start_call_main.h:58
#43 0x0000786b5062a28b in __libc_start_main_impl (main=0x5635cf706060 <main>, argc=2, argv=0x7fff4a1ece08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff4a1ecdf8) at ../csu/libc-start.c:360
#44 0x00005635cf706095 in _start ()
===========================================================


Traceback (most recent call last):
  File "/home/dkennedy_umass_edu/LNV/MyFiles/LFVLNV/AnalysisAndSuch/combineHistos.py", line 81, in <module>
    can.Print(init_dir+'/plots/stackTest.png')
TypeError: none of the 2 overloaded methods succeeded. Full details:
  void TPad::Print(const char* filename, const char* option) =>
    TypeError: takes at least 2 arguments (1 given)
  void TPad::Print(const char* filename = "") =>
    SegmentationViolation: segfault in C++; program state was reset

Looking at the Print() documentation. I changed the Print() line to can.Print(<file location>, 'png'). This, in turn still produces a segmentation fault, but this time telling my the reverse – that Print() takes 1 argument and 2 were given.

Dyson_Kennedy · November 25, 2024, 9:42pm

Here is the second segmentation fault

 *** Break *** segmentation violation



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

Thread 2 (Thread 0x77a8f6c006c0 (LWP 127316) "python3"):
#0  0x000077a906a98d61 in __futex_abstimed_wait_common64 (private=40025, cancel=true, abstime=0x77a8f6bff9b0, op=137, expected=0, futex_word=0x77a907354714 <_PyRuntime+436>) at ./nptl/futex-internal.c:57
#1  __futex_abstimed_wait_common (cancel=true, private=40025, abstime=0x77a8f6bff9b0, clockid=23337, expected=0, futex_word=0x77a907354714 <_PyRuntime+436>) at ./nptl/futex-internal.c:87
#2  __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word
entry=0x77a907354714 <_PyRuntime+436>, expected=expected
entry=0, clockid=clockid
entry=1, abstime=abstime
entry=0x77a8f6bff9b0, private=private
entry=0) at ./nptl/futex-internal.c:139
#3  0x000077a906a9bc7e in __pthread_cond_wait_common (abstime=0x77a8f6bff9b0, clockid=1, mutex=0x77a907354718 <_PyRuntime+440>, cond=0x77a9073546e8 <_PyRuntime+392>) at ./nptl/pthread_cond_wait.c:503
#4  ___pthread_cond_timedwait64 (cond=cond
entry=0x77a9073546e8 <_PyRuntime+392>, mutex=mutex
entry=0x77a907354718 <_PyRuntime+440>, abstime=abstime
entry=0x77a8f6bff9b0) at ./nptl/pthread_cond_wait.c:652
#5  0x000077a90704aabf in PyCOND_TIMEDWAIT (us=<optimized out>, mut=0x77a907354718 <_PyRuntime+440>, cond=0x77a9073546e8 <_PyRuntime+392>) at Python/condvar.h:73
#6  take_gil (tstate=tstate
entry=0x5b29d8df87d0) at Python/ceval_gil.h:231
#7  0x000077a90704afc2 in PyEval_RestoreThread (tstate=tstate
entry=0x5b29d8df87d0) at Python/ceval.c:521
#8  0x000077a90711c1a4 in pysleep (timeout=<optimized out>) at ./Modules/timemodule.c:2168
#9  time_sleep (self=<optimized out>, timeout_obj=<optimized out>) at ./Modules/timemodule.c:383
#10 0x000077a906f9c2d6 in cfunction_vectorcall_O (func=0x77a9069a7470, args=0x77a8f751a1e8, nargsf=<optimized out>, kwnames=<optimized out>) at Objects/methodobject.c:514
#11 0x000077a906f49287 in _PyObject_VectorcallTstate (kwnames=0x5b29d8dca968, nargsf=<optimized out>, args=0x77a8f751a1e8, callable=0x77a9069a7470, tstate=0x5b29d8df87d0) at ./Include/internal/pycore_call.h:92
#12 PyObject_Vectorcall (callable=callable
entry=0x77a9069a7470, args=args
entry=0x77a8f751a1e8, nargsf=<optimized out>, kwnames=kwnames
entry=0x0) at Objects/call.c:299
#13 0x000077a906eeaa32 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:4769
#14 0x000077a90704bd58 in _PyEval_EvalFrame (throwflag=0, frame=0x77a8f751a188, tstate=0x5b29d8df87d0) at ./Include/internal/pycore_ceval.h:73
#15 _PyEval_Vector (tstate=0x5b29d8df87d0, func=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>) at Python/ceval.c:6434
#16 0x000077a906eed458 in do_call_core (use_tracing=<optimized out>, kwdict=0x77a906520780, callargs=0x77a9069b99f0, func=0x77a90651d580, tstate=<optimized out>) at Python/ceval.c:7352
#17 _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:5376
#18 0x000077a90704bd58 in _PyEval_EvalFrame (throwflag=0, frame=0x77a8f751a020, tstate=0x5b29d8df87d0) at ./Include/internal/pycore_ceval.h:73
#19 _PyEval_Vector (tstate=0x5b29d8df87d0, func=<optimized out>, locals=<optimized out>, args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>) at Python/ceval.c:6434
#20 0x000077a906f4bcc4 in _PyObject_VectorcallTstate (kwnames=0x0, nargsf=1, args=0x77a8f6bffe18, callable=0x77a8f79896c0, tstate=0x5b29d8df87d0) at ./Include/internal/pycore_call.h:92
#21 method_vectorcall (method=<optimized out>, args=0x77a907362b90 <_PyRuntime+58928>, nargsf=<optimized out>, kwnames=0x0) at Objects/classobject.c:67
#22 0x000077a90711ab82 in thread_run (boot_raw=0x5b29d8e257f0) at ./Modules/_threadmodule.c:1124
#23 0x000077a9070a7ffb in pythread_wrapper (arg=<optimized out>) at Python/thread_pthread.h:241
#24 0x000077a906a9ca94 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
#25 0x000077a906b29c3c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Thread 1 (Thread 0x77a906cede80 (LWP 127253) "python3"):
#0  0x000077a906b107e3 in __GI___wait4 (pid=127376, stat_loc=stat_loc
entry=0x7ffe7277be98, options=options
entry=0, usage=usage
entry=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:30
#1  0x000077a906b108eb in __GI___waitpid (pid=<optimized out>, stat_loc=stat_loc
entry=0x7ffe7277be98, options=options
entry=0) at ./posix/waitpid.c:38
#2  0x000077a906a585ab in do_system (line=<optimized out>) at ../sysdeps/posix/system.c:172
#3  0x000077a906252a47 in TUnixSystem::StackTrace() () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libCore.so.6.30
#4  0x000077a9064110f3 in (anonymous namespace)::TExceptionHandlerImp::HandleException(int) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy_backend3_11.so.6.30
#5  0x000077a906252209 in TUnixSystem::DispatchSignals(ESignals) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libCore.so.6.30
#6  <signal handler called>
#7  0x000000000000d49c in ?? ()
#8  0x000077a8f5c38a9a in TLegend::PaintPrimitives() () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGraf.so.6.30.06
#9  0x000077a8f59e6ea3 in TPad::Paint(char const*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#10 0x000077a8f59e14bc in TPad::Print(char const*, char const*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#11 0x000077a8f593501e in ?? ()
#12 0x0000000000000002 in ?? ()
#13 0x000077a90641aed8 in WrapperCall(long, unsigned long, void*, void*, void*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy_backend3_11.so.6.30
#14 0x000077a9064a0cc6 in CPyCppyy::(anonymous namespace)::VoidExecutor::Execute(long, void*, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#15 0x000077a90648acbb in CPyCppyy::CPPMethod::ExecuteFast(void*, long, CPyCppyy::CallContext*) [clone .isra.0] () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#16 0x000077a90648e6c8 in CPyCppyy::CPPMethod::ExecuteProtected(void*, long, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#17 0x000077a90648c25d in CPyCppyy::CPPMethod::Execute(void*, long, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#18 0x000077a90648d233 in CPyCppyy::CPPMethod::Call(CPyCppyy::CPPInstance*&, _object*, _object*, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#19 0x000077a906492c3f in CPyCppyy::(anonymous namespace)::mp_call(CPyCppyy::CPPOverload*, _object*, _object*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#20 0x000077a906f48c41 in _PyObject_MakeTpCall (tstate=0x77a90737cf18 <_PyRuntime+166328>, callable=callable
entry=0x77a8f6ea61d0, args=args
entry=0x77a906ddc078, nargs=2, keywords=keywords
entry=0x0) at Objects/call.c:214
#21 0x000077a906f492bf in _PyObject_VectorcallTstate (kwnames=0x0, nargsf=<optimized out>, args=0x77a906ddc078, callable=0x77a8f6ea61d0, tstate=<optimized out>) at ./Include/internal/pycore_call.h:90
#22 0x000077a906eeaa32 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:4769
#23 0x000077a90704bbec in _PyEval_EvalFrame (throwflag=0, frame=0x77a906ddc020, tstate=0x77a90737cf18 <_PyRuntime+166328>) at ./Include/internal/pycore_ceval.h:73
#24 _PyEval_Vector (args=0x0, argcount=0, kwnames=0x0, locals=0x77a906507800, func=0x77a9069d6f20, tstate=0x77a90737cf18 <_PyRuntime+166328>) at Python/ceval.c:6434
#25 PyEval_EvalCode (co=co
entry=0x5b29d56e7a50, globals=globals
entry=0x77a906507800, locals=locals
entry=0x77a906507800) at Python/ceval.c:1148
#26 0x000077a907096d39 in run_eval_code_obj (locals=0x77a906507800, globals=0x77a906507800, co=0x5b29d56e7a50, tstate=0x77a90737cf18 <_PyRuntime+166328>) at Python/pythonrun.c:1710
#27 run_mod (mod=<optimized out>, filename=filename
entry=0x77a906996230, globals=globals
entry=0x77a906507800, locals=locals
entry=0x77a906507800, flags=flags
entry=0x7ffe7277f928, arena=arena
entry=0x77a90691b8b0) at Python/pythonrun.c:1731
#28 0x000077a9070986ce in pyrun_file (flags=0x7ffe7277f928, closeit=1, locals=0x77a906507800, globals=0x77a906507800, start=257, filename=0x77a906996230, fp=<optimized out>) at Python/pythonrun.c:1626
#29 _PyRun_SimpleFileObject (fp=fp
entry=0x5b29d56b4370, filename=filename
entry=0x77a906996230, closeit=closeit
entry=1, flags=flags
entry=0x7ffe7277f928) at Python/pythonrun.c:440
#30 0x000077a907098d50 in _PyRun_AnyFileObject (fp=0x5b29d56b4370, filename=filename
entry=0x77a906996230, closeit=closeit
entry=1, flags=flags
entry=0x7ffe7277f928) at Python/pythonrun.c:79
#31 0x000077a9070b9e00 in pymain_run_file_obj (skip_source_first_line=0, filename=0x77a906996230, program_name=0x77a9065079f0) at Modules/main.c:360
#32 pymain_run_file (config=0x77a907362f60 <_PyRuntime+59904>) at Modules/main.c:379
#33 pymain_run_python (exitcode=0x7ffe7277f920) at Modules/main.c:601
#34 Py_RunMain () at Modules/main.c:680
#35 0x000077a9070ba39e in pymain_main (args=0x7ffe7277fa40) at Modules/main.c:710
#36 Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:734
#37 0x000077a906a2a1ca in __libc_start_call_main (main=main
entry=0x5b29d4d7c060 <main>, argc=argc
entry=2, argv=argv
entry=0x7ffe7277fbd8) at ../sysdeps/nptl/libc_start_call_main.h:58
#38 0x000077a906a2a28b in __libc_start_main_impl (main=0x5b29d4d7c060 <main>, argc=2, argv=0x7ffe7277fbd8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe7277fbc8) at ../csu/libc-start.c:360
#39 0x00005b29d4d7c095 in _start ()
===========================================================


The lines below might hint at the cause of the crash. If you see question
marks as part of the stack trace, try to recompile with debugging information
enabled and export CLING_DEBUG=1 environment variable before running.
You may get help by asking at the ROOT forum https://root.cern/forum
preferably using the command (.forum bug) in the ROOT prompt.
Only if you are really convinced it is a bug in ROOT then please submit a
report at https://root.cern/bugs or (preferably) using the command (.gh bug) in
the ROOT prompt. Please post the ENTIRE stack trace
from above as an attachment in addition to anything else
that might help us fixing this issue.
===========================================================
#7  0x000000000000d49c in ?? ()
#8  0x000077a8f5c38a9a in TLegend::PaintPrimitives() () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGraf.so.6.30.06
#9  0x000077a8f59e6ea3 in TPad::Paint(char const*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#10 0x000077a8f59e14bc in TPad::Print(char const*, char const*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libGpad.so.6.30.06
#11 0x000077a8f593501e in ?? ()
#12 0x0000000000000002 in ?? ()
#13 0x000077a90641aed8 in WrapperCall(long, unsigned long, void*, void*, void*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy_backend3_11.so.6.30
#14 0x000077a9064a0cc6 in CPyCppyy::(anonymous namespace)::VoidExecutor::Execute(long, void*, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#15 0x000077a90648acbb in CPyCppyy::CPPMethod::ExecuteFast(void*, long, CPyCppyy::CallContext*) [clone .isra.0] () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#16 0x000077a90648e6c8 in CPyCppyy::CPPMethod::ExecuteProtected(void*, long, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#17 0x000077a90648c25d in CPyCppyy::CPPMethod::Execute(void*, long, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#18 0x000077a90648d233 in CPyCppyy::CPPMethod::Call(CPyCppyy::CPPInstance*&, _object*, _object*, CPyCppyy::CallContext*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#19 0x000077a906492c3f in CPyCppyy::(anonymous namespace)::mp_call(CPyCppyy::CPPOverload*, _object*, _object*) () from /modules/spack/packages/linux-ubuntu24.04-x86_64_v3/gcc-13.2.0/root-6.30.06-thrfpcvvbuqgtwvd3qvuythhw4jppu57/lib/root/libcppyy3_11.so
#20 0x000077a906f48c41 in _PyObject_MakeTpCall (tstate=0x77a90737cf18 <_PyRuntime+166328>, callable=callable
entry=0x77a8f6ea61d0, args=args
entry=0x77a906ddc078, nargs=2, keywords=keywords
entry=0x0) at Objects/call.c:214
#21 0x000077a906f492bf in _PyObject_VectorcallTstate (kwnames=0x0, nargsf=<optimized out>, args=0x77a906ddc078, callable=0x77a8f6ea61d0, tstate=<optimized out>) at ./Include/internal/pycore_call.h:90
#22 0x000077a906eeaa32 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:4769
#23 0x000077a90704bbec in _PyEval_EvalFrame (throwflag=0, frame=0x77a906ddc020, tstate=0x77a90737cf18 <_PyRuntime+166328>) at ./Include/internal/pycore_ceval.h:73
#24 _PyEval_Vector (args=0x0, argcount=0, kwnames=0x0, locals=0x77a906507800, func=0x77a9069d6f20, tstate=0x77a90737cf18 <_PyRuntime+166328>) at Python/ceval.c:6434
#25 PyEval_EvalCode (co=co
entry=0x5b29d56e7a50, globals=globals
entry=0x77a906507800, locals=locals
entry=0x77a906507800) at Python/ceval.c:1148
#26 0x000077a907096d39 in run_eval_code_obj (locals=0x77a906507800, globals=0x77a906507800, co=0x5b29d56e7a50, tstate=0x77a90737cf18 <_PyRuntime+166328>) at Python/pythonrun.c:1710
#27 run_mod (mod=<optimized out>, filename=filename
entry=0x77a906996230, globals=globals
entry=0x77a906507800, locals=locals
entry=0x77a906507800, flags=flags
entry=0x7ffe7277f928, arena=arena
entry=0x77a90691b8b0) at Python/pythonrun.c:1731
#28 0x000077a9070986ce in pyrun_file (flags=0x7ffe7277f928, closeit=1, locals=0x77a906507800, globals=0x77a906507800, start=257, filename=0x77a906996230, fp=<optimized out>) at Python/pythonrun.c:1626
#29 _PyRun_SimpleFileObject (fp=fp
entry=0x5b29d56b4370, filename=filename
entry=0x77a906996230, closeit=closeit
entry=1, flags=flags
entry=0x7ffe7277f928) at Python/pythonrun.c:440
#30 0x000077a907098d50 in _PyRun_AnyFileObject (fp=0x5b29d56b4370, filename=filename
entry=0x77a906996230, closeit=closeit
entry=1, flags=flags
entry=0x7ffe7277f928) at Python/pythonrun.c:79
#31 0x000077a9070b9e00 in pymain_run_file_obj (skip_source_first_line=0, filename=0x77a906996230, program_name=0x77a9065079f0) at Modules/main.c:360
#32 pymain_run_file (config=0x77a907362f60 <_PyRuntime+59904>) at Modules/main.c:379
#33 pymain_run_python (exitcode=0x7ffe7277f920) at Modules/main.c:601
#34 Py_RunMain () at Modules/main.c:680
#35 0x000077a9070ba39e in pymain_main (args=0x7ffe7277fa40) at Modules/main.c:710
#36 Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at Modules/main.c:734
#37 0x000077a906a2a1ca in __libc_start_call_main (main=main
entry=0x5b29d4d7c060 <main>, argc=argc
entry=2, argv=argv
entry=0x7ffe7277fbd8) at ../sysdeps/nptl/libc_start_call_main.h:58
#38 0x000077a906a2a28b in __libc_start_main_impl (main=0x5b29d4d7c060 <main>, argc=2, argv=0x7ffe7277fbd8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe7277fbc8) at ../csu/libc-start.c:360
#39 0x00005b29d4d7c095 in _start ()
===========================================================


Traceback (most recent call last):
  File "/home/dkennedy_umass_edu/LNV/MyFiles/LFVLNV/AnalysisAndSuch/combineHistos.py", line 81, in <module>
    can.Print(init_dir+'/plots/stackTest.png', 'png')
TypeError: none of the 2 overloaded methods succeeded. Full details:
  void TPad::Print(const char* filename, const char* option) =>
    SegmentationViolation: segfault in C++; program state was reset
  void TPad::Print(const char* filename = "") =>
    TypeError: takes at most 1 arguments (2 given)

Dyson_Kennedy · November 25, 2024, 9:45pm

And without that line, the SaveAs line produces an empty .root file

yus · November 25, 2024, 10:03pm

Hi Dyson,

and what happens if you comment out the line with

leg.Draw()

?

Dyson_Kennedy · November 27, 2024, 4:39pm

It just makes an empty root file

Dyson_Kennedy · November 27, 2024, 4:58pm

If I do it outside of a function, it works.
However, my goal is the following:
I have 5 different types of events that go through an analysis independently. Each one produces a handful of histograms which are saved as root files. I want to have a file that produces a THStack for each histogram type where each stack has each event type represented. Is there any way to do this without hardcoding it all? I’ve tried functions and for loops and those seem to get tripped up with the pointer definitions. I just took the contents of the function out of the function and it worked, but if that’s the only way I can get it to work, then I’d need to just copy and paste and alter for the other histogram types. As is, I already have to copy and paste for each event type, but both seem like extremely inefficient uses of code