TSpectrum seg fault

From: Roger Mason <rmason_at_esd.mun.ca>
Date: Mon, 20 Jul 2009 09:12:00 -0230

Hello,

I'm trying to use TSpectrum to find peak candidates in a spectrum:

#include <TSpectrum.h>
#include <TGraph.h>
#include <TH1F.h>
#include <TCanvas.h>

void tspectrum () {
  TGraph* file1 = new TGraph("file1_2col_np.dat");   TH1F* file1h = (TH1F*)file1;
  file1h->Draw("ap");
  TSpectrum* s = new TSpectrum(10);
  Int_t nfound = s->Search(file1h,3,"",0.05); }

When I try to compile/run I get a seg fault:

root [0] .x tspectrum.C++
Info in <TUnixSystem::ACLiC>: creating shared library /home/rmason/Research/Projects/CryoSpectra/090706/./tspectrum_C.so In file included from
/home/rmason/Research/Projects/CryoSpectra/090706/./filezJLwq2.h:32,

                 from
                 /home/rmason/Research/Projects/CryoSpectra/090706/./filezJLwq2.cxx:16:

/home/rmason/Research/Projects/CryoSpectra/090706/./tspectrum.C: In function 'void tspectrum()':
/home/rmason/Research/Projects/CryoSpectra/090706/./tspectrum.C:11: warning: unused variable 'nfound'
<TCanvas::MakeDefCanvas>: created default TCanvas with name c1

• Break *** segmentation violation (no debugging symbols found) Using host libthread_db library "/lib/libthread_db.so.1". Attaching to program: /proc/7593/exe, process 7593 (no debugging symbols found)...done. (no debugging symbols found)...done. [Thread debugging using libthread_db enabled] [New Thread 0xb6d406d0 (LWP 7593)] (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done. (no debugging symbols found)...done.

(no debugging symbols found)
0xb7f4f410 in __kernel_vsyscall ()
#1 0xb6e50f03 in waitpid () from /lib/libc.so.6
#2 0xb6df4b29 in ?? () from /lib/libc.so.6
#3 0xb6f03e5d in system () from /lib/libpthread.so.0
#4 0xb7a6f70b in TUnixSystem::Exec () from
/usr/lib/root/libCore.so.5.20
#5 0xb7a74507 in TUnixSystem::StackTrace () from
/usr/lib/root/libCore.so.5.20
#6 0xb7a73521 in TUnixSystem::DispatchSignals () from
/usr/lib/root/libCore.so.5.20
#7 0xb7a735db in ?? () from /usr/lib/root/libCore.so.5.20
#8 0xb7a6cbb1 in ?? () from /usr/lib/root/libCore.so.5.20
#9 <signal handler called>
#10 0xb6fc26a0 in std::ostream::sentry::sentry () from
/usr/lib/gcc/i686-pc-linux-gnu/4.3.2/libstdc++.so.6
#11 0xb6fc41f9 in std::__ostream_insert<char, std::char_traits<char> >
()

   from /usr/lib/gcc/i686-pc-linux-gnu/4.3.2/libstdc++.so.6
#12 0xb6fc44dc in std::operator<< <std::char_traits<char> > ()

   from /usr/lib/gcc/i686-pc-linux-gnu/4.3.2/libstdc++.so.6
#13 0xb7997672 in TAttLine::SaveLineAttributes () from
/usr/lib/root/libCore.so.5.20
#14 0xb6604652 in TSpectrum::Search () from /usr/lib/root/libSpectrum.so
#15 0xb5808fe1 in tspectrum () from

/home/rmason/Research/Projects/CryoSpectra/090706/./tspectrum_C.so
#16 0xb5809034 in G__filezJLwq2__0_373 ()

   from
   /home/rmason/Research/Projects/CryoSpectra/090706/./tspectrum_C.so
#17 0xb71cee31 in Cint::G__ExceptionWrapper () from
/usr/lib/root/libCint.so.5.20
#18 0xb727b29d in G__execute_call () from /usr/lib/root/libCint.so.5.20
#19 0xb727c2ca in G__call_cppfunc () from /usr/lib/root/libCint.so.5.20
#20 0xb725608e in G__interpret_func () from
/usr/lib/root/libCint.so.5.20
#21 0xb7245707 in G__getfunction () from /usr/lib/root/libCint.so.5.20
#22 0xb72231af in G__getitem () from /usr/lib/root/libCint.so.5.20
#23 0xb7229142 in G__getexpr () from /usr/lib/root/libCint.so.5.20
#24 0xb7231157 in G__calc_internal () from /usr/lib/root/libCint.so.5.20
#25 0xb72b9848 in G__process_cmd () from /usr/lib/root/libCint.so.5.20
#26 0xb7a6237d in TCint::ProcessLine () from
/usr/lib/root/libCore.so.5.20
#27 0xb7a61fde in TCint::ProcessLineSynch () from
/usr/lib/root/libCore.so.5.20
#28 0xb79946a1 in TApplication::ExecuteFile () from
/usr/lib/root/libCore.so.5.20
#29 0xb7994963 in TApplication::ProcessFile () from
/usr/lib/root/libCore.so.5.20
#30 0xb7991b29 in TApplication::ProcessLine () from
/usr/lib/root/libCore.so.5.20
#31 0xb7039f03 in TRint::HandleTermInput () from
/usr/lib/root/libRint.so.5.20
#32 0xb70383c2 in TTermInputHandler::Notify () from
/usr/lib/root/libRint.so.5.20
#33 0xb703a972 in TTermInputHandler::ReadNotify () from
/usr/lib/root/libRint.so.5.20
#34 0xb7a730bf in TUnixSystem::CheckDescriptors () from
/usr/lib/root/libCore.so.5.20
#35 0xb7a736cf in TUnixSystem::DispatchOneEvent () from
/usr/lib/root/libCore.so.5.20
#36 0xb79ed92c in TSystem::InnerLoop () from
/usr/lib/root/libCore.so.5.20
#37 0xb79f0bf3 in TSystem::Run () from /usr/lib/root/libCore.so.5.20
#38 0xb7990709 in TApplication::Run () from
/usr/lib/root/libCore.so.5.20
#39 0xb703a494 in TRint::Run () from /usr/lib/root/libRint.so.5.20
#40 0x08048e3d in main ()

The program is running. Quit anyway (and detach it)? (y or n) [answered Y; input not from terminal]
Detaching from program: /proc/7593/exe, process 7593 Root >

I'm using ROOT 5.20/00 (trunk_at_24524, May 17 2009, 10:14:00 on linux). It might be relevant that Root was compiled with gcc 4.1.2 but I'm compiling this macro with gcc 4.3.2.

Thanks for any help,
Roger Received on Mon Jul 20 2009 - 14:10:48 CEST