[ROOT] Funny Double_t (?) problem in 3.05_03

From: Thomas Schoerner (schorner@mail.desy.de)
Date: Mon Jun 16 2003 - 23:36:56 MEST


Hello,

I am a newcomer to ROOT and using v3.05_03 with gcc2.95.3. I have code
which runs (more or less beautifully in another enironment (CERN lxplus),
but I am having problems on the DESY AFS machines:

I have a method:

Double_t ZeusKtAlgo::distanceIJ(const TLorentzVector *pI,
				    const TLorentzVector *pJ) const
{
  Double_t disIJ = 0.;
  Double_t partIPt2 = pI->Perp2();
  Double_t partJPt2 = pJ->Perp2();
  Double_t minTraE2 = TMath::Min(partIPt2, partJPt2);

  // this is still okay
  cout << pI->Perp2() << ' ' << pJ->Perp2() << ' '
       << TMath::Min(pI->Perp2(),pJ->Perp2()) << endl;

  // these printouts crash
  cout << TMath::Min(partIPt2, partJPt2) << endl;
  cout << partIPt2 << endl;
  cout << partJPt2 << endl;
  cout << minTraE2 << endl;

  // no chance to get into this if condition ...
  if(minTraE2 != 0.)
  {
      cout << "mist" << endl;
  }

  // cannot return this value
  return disIJ;
}

As stated in the piece of code I can do the first printout which accesses
the functions themselves, but as soon as I try to assign a value to a
variable and access (print ...) this later ... it crashes with some
cryptic error message which I print below. I have the following includes:
#include <TROOT.h>
#include <TObject.h>
#include <TObjArray.h>
#include <iostream.h>
#include <TArrayI.h>
#include <TArrayD.h>
#include <TLorentzVector.h>
#include "ZeusAlgo.h"

Does anybody have any idea what I am doing wrong here? Is there some way
to get clearer debugging information?

Thanks for your help.

Cheers,

Thomas

 *** Break *** segmentation violation
 Generating stack trace...
 0x401d52ca in StackTrace__11TUnixSystem + 0x2e6 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x401d3a2f in DispatchSignals__11TUnixSystem8ESignals + 0xc7 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x401d2cd0 in GetSize__C8TWebFile + 0xc4 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x401d6b93 in GetSockOpt__11TUnixSystemiiPi + 0x30f from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x40e75e58 in killpg + 0x58 from /lib/libc.so.6
 0x40641144 in G__exec_asm + 0x1e4 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x405f99e8 in G__exec_bytecode + 0x774 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x40604ed6 in G__interpret_func + 0x1082 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x40642aa5 in G__exec_asm + 0x1b45 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x40633328 in G__exec_loop + 0x50c from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x406338ab in G__exec_for + 0x313 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x406364de in G__exec_statement + 0x2942 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x40605fbc in G__interpret_func + 0x2168 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x405ea4a7 in G__getfunction + 0x14ef from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x4067d313 in G__getstructmem + 0x80f from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x40676def in G__getvariable + 0x6bf from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x405e2019 in G__getitem + 0x4f9 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so

 *** Break *** keyboard interrupt FILE:ZeusKtAlgo.C LINE:46
 0x405e08e2 in G__getexpr + 0x9092 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x4062f1ad in G__exec_function + 0x1a9 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x4063679d in G__exec_statement + 0x2c01 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x40605fbc in G__interpret_func + 0x2168 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x406909b6 in ExecInterpretedFunc__11G__CallFuncP8G__value + 0xba from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x406907dd in ExecInt__11G__CallFuncPv + 0x8d from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x40c865b2 in ProcessCut__13TSelectorCinti + 0x6a from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libTree.so
 0x4169bfbb in Process__11TTreePlayerP9TSelectorPCcii + 0x20b from
/products/ROOT/3.05_03/gcc-2.95.3/root/lib/libTreePlayer.so
 0x4169bcf2 in Process__11TTreePlayerPCcT1ii + 0xba from
/products/ROOT/3.05_03/gcc-2.95.3/root/lib/libTreePlayer.so
 0x40c8e916 in Process__5TTreePCcT1ii + 0x52 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libTree.so
 0x40c7c3e7 in Process__6TChainPCcT1ii + 0x47 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libTree.so
 0x40cc0d5c in G__cpp_dllrevG__Tree + 0x1e7b0 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libTree.so
 0x40616625 in G__call_cppfunc + 0x291 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x40604668 in G__interpret_func + 0x814 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x405ea4a7 in G__getfunction + 0x14ef from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x4067d313 in G__getstructmem + 0x80f from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x40676def in G__getvariable + 0x6bf from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x405e2019 in G__getitem + 0x4f9 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x405e08e2 in G__getexpr + 0x9092 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x4062f1ad in G__exec_function + 0x1a9 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x4063679d in G__exec_statement + 0x2c01 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x405c6dd5 in G__exec_tempfile_core + 0x2dd from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x405c6fcd in G__exec_tempfile + 0x25 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x4063f3c3 in G__process_cmd + 0x4e8b from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCint.so
 0x4018bdc1 in ProcessLine__5TCintPCcPQ212TInterpreter10EErrorCode + 0xa1
from /products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x4018bee3 in ProcessLineSynch__5TCintPCcPQ212TInterpreter10EErrorCode +
0x4f from /products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x40116987 in ProcessFile__12TApplicationPCcPi + 0x6f7 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x40116115 in ProcessLine__12TApplicationPCcbPi + 0x565 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x40dd1e6b in HandleTermInput__5TRint + 0x197 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libRint.so
 0x40dd0f89 in Notify__17TTermInputHandler + 0x29 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libRint.so
 0x40dea5d8 in ReadNotify__17TTermInputHandler at
/data/gcc-2.95.3/hierhinein/gcc/../../gcc-2.95.3/gcc/cp/new.cc:0 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libRint.so
 0x401d3da9 in CheckDescriptors__11TUnixSystem + 0xd9 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x401d35e5 in DispatchOneEvent__11TUnixSystemb + 0xb5 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x40161499 in InnerLoop__7TSystem + 0x31 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x40161409 in Run__7TSystem + 0x79 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x40116bd6 in Run__12TApplicationb + 0x32 from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libCore.so
 0x40dd1887 in Run__5TRintb + 0x2df from
/products/ROOT/3.05_03/ROOT-linux24-gcc-2.95.3/lib/libRint.so
 0x080487f7 in main + 0x83 from
/products/ROOT/3.05_03/gcc-2.95.3/root/bin/root.exe
 0x40e65c5f in __libc_start_main + 0xcf from /lib/libc.so.6
 0x080486a1 in _start + 0x21 from
/products/ROOT/3.05_03/gcc-2.95.3/root/bin/root.exe
Root > Function Find() busy flag cleared
Function distanceIJ() busy flag cleared
Function ProcessCut() busy flag cleared



   +-------------------------------------------------------------------+
   |  Thomas Schoerner-Sadenius          thomas.schoerner@cern.ch      |
   |  Universitaet Hamburg, Institut fuer Experimentalphysik           |
   |  Luruper Chaussee 149               phone 0049-40-8998-2954       |
   |  D-22761 Hamburg                    room  67b / 5                 |
   +-------------------------------------------------------------------+



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