Re: Problem with writing my own object to TTree

Hi Philippe,

> You code looks correct and I can not reproduce the problem with  
> root 5.17/04 and up.  Could you
> try a newer version of ROOT?
>
> Also I noted that your makefile incorrect link twice against all  
> the .o files
> (once in the library, directly in the executable).
>

Thanks for spotting that. I'm fairly new to writing my own Makefiles and this was mostly a matter of cutting and pasting from other people.

As a matter of fact, after fixing the Makefile, I can't reproduce my problem anymore with the test code I sent you. I've now gone back to the full code and made a slightly more involved test case. The tarball is attached to this email. This code exhibits the same problem as before. I've tried with the slightly newer ROOT version 5.17/03 (which I happen to have available on my laptop).

Here is the backtrace:

#0 0x90029f07 in wait4 ()
#1 0x9004723b in system ()
#2 0x010d198f in TUnixSystem::Exec (this=0xad04120,
shellcmd=0xb028a10 "/usr/bin/gdb -batch -n -x /ROOT/pro/root/etc/gdb- backtrace-script -p 17279 > /tmp/rootstack.17279 2>&1") at unix/src/ TUnixSystem.cxx:1834
#3 0x010d1d29 in TUnixSystem::StackTrace (this=0xad04120) at unix/
src/TUnixSystem.cxx:1925
#4 0x010d4bc9 in TUnixSystem::DispatchSignals (this=0xad04120,
sig=kSigBus) at unix/src/TUnixSystem.cxx:976
#5 0x010d4d91 in SigHandler (sig=kSigBus) at unix/src/
TUnixSystem.cxx:342
#6 0x010d3b7f in sighandler (sig=10) at unix/src/TUnixSystem.cxx:3212
#7 <signal handler called>
#8 0x00000000 in ?? ()
#9 0x010b14b9 in TClass::Streamer (this=0xb95acc0, object=0xb941040,
b=@0xb9b9460) at meta/src/TClass.cxx:4247
#10 0x036b11c7 in TBufferFile::WriteFastArray (this=0xb9b9460,
start=0xb941010, cl=0xb95acc0, n=64, streamer=0x0) at io/src/ TBufferFile.cxx:1641
#11 0x037c33a4 in TStreamerInfo::WriteBufferAux<char**>
(this=0xb992b80, b=@0xb9b9460, arr=@0xbfffee10, first=2, narr=1, eoffset=0, arrayMode=0) at io/src/TStreamerInfoWriteBuffer.cxx:624
#12 0x065a22b6 in TBranchElement::FillLeaves (this=0xb9b8f90,
b=@0xb9b9460) at tree/src/TBranchElement.cxx:1144
#13 0x0659650d in TBranch::Fill (this=0xb9b8f90) at tree/src/
TBranch.cxx:762
#14 0x065a1e7c in TBranchElement::Fill (this=0xb9b8f90) at tree/src/
TBranchElement.cxx:1043
#15 0x065a1fe9 in TBranchElement::Fill (this=0xb9b73c0) at tree/src/
TBranchElement.cxx:1068
#16 0x065e2cd8 in TTree::Fill (this=0xb959ab0) at tree/src/TTree.cxx:
3180
#17 0x000d2aea in Decoder::ReadData ()
#18 0x000028e8 in main ()

Could you have a look at this, please?

Thank you very much,

        Tobi