Hi Colin,
Are you using the version from CVS or the version from the binary
distribution? We added one protection in TSelectorDraw::Notify
in the CVS version.
In case you already use the version from CVS, could you send me a small
tar file with the strict minimum necessary to reproduce the problem?
Rene Brun
On
Sat, 5 Apr 2003, Colin Bernet wrote:
>
> Hi rooters !
>
> I have a piece of code that is working with root 3.03/9 but that gives a
> segv with 3.05/03.
>
> this occurs when I call chain.LoadTree(0) :
>
>
> (gdb) p i
> $1 = 0
> (gdb) l
> 191 // this is a chain
> 192
> 193 // chain->SetNotify(this);
> 194
> 195 int i=0;
> 196 while( chain->LoadTree(i++) != -2) { // <=== here !
> 197 TFile *file = chain->GetFile();
> 198 if(file) {
> 199 fDfm = (DetFileManager*)file->Get("DetFileManager");
> 200 if(fDfm) {
> (gdb) n
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x4143e540 in TSelectorDraw::Notify ()
> from
> /afs/cern.ch/sw/root/v3.05.03/rh73_gcc2953/root/lib/libTreePlayer.so
> (gdb) bt
> #0 0x4143e540 in TSelectorDraw::Notify ()
> from
> /afs/cern.ch/sw/root/v3.05.03/rh73_gcc2953/root/lib/libTreePlayer.so
> #1 0x4145dfe1 in TTreePlayer::UpdateFormulaLeaves ()
> from
> /afs/cern.ch/sw/root/v3.05.03/rh73_gcc2953/root/lib/libTreePlayer.so
> #2 0x40d72351 in TChain::LoadTree ()
> from /afs/cern.ch/sw/root/v3.05.03/rh73_gcc2953/root/lib/libTree.so
> #3 0x08067146 in MyEfficiency::CreateDetectors (this=0x8888040)
> at MyEfficiency.cc:196
> #4 0x080666d7 in MyEfficiency::Begin (this=0x8888040, tree=0x86cec58)
> at MyEfficiency.cc:78
> #5 0x4145b48b in TTreePlayer::Process ()
> from
> /afs/cern.ch/sw/root/v3.05.03/rh73_gcc2953/root/lib/libTreePlayer.so
> #6 0x40d87065 in TTree::Process ()
> from /afs/cern.ch/sw/root/v3.05.03/rh73_gcc2953/root/lib/libTree.so
> #7 0x40d72f14 in TChain::Process ()
> from /afs/cern.ch/sw/root/v3.05.03/rh73_gcc2953/root/lib/libTree.so
> #8 0x08076cfa in main () at Debug.cc:13
> #9 0x42017589 in __libc_start_main () from /lib/i686/libc.so.6
>
>
> I'm using /afs/cern.ch/sw/root/v3.05.03/rh73_gcc2953/root, so I would like
> to avoid downloading root and compiling in debug mode to find out what
> happens.
>
> Maybe somebody knows how I can solve this problem ?
>
> have a nice week-end,
> Colin
>
>
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