Re: segfault trying to plot ntuples

Yes, you are right. Your code works with5.27 but not 5.26. I let Philippe comment if he has an idea.

Rene Brun

Suvayu Ali wrote:
> Hi Rene,
>
> On Friday 04 June 2010 12:47 AM, Rene Brun wrote:
>> I cannot reproduce your problem using your script with no changes and
>> your files.
>> I tried on Linux (32 and 64 bits) and mac
>>
>
> After your message I tried with ROOT 5.27/03 and 5.27/02, and the
> problem isn't there any more. But on using 5.26 it reappears.
>
> I am on Fedora 13 x86_64. I can switch to using 5.27 for now. But let
> me know if I can try something else to confirm whether its some one
> off problem on my side.
>
>> Rene Brun
>>
>>
>>>
>>> And a sample of the macro is attached. The root files I used are here:
>>> <http://hep.phys.sfu.ca/~suvayu/4roottalk/>
>>>
>>> Backtrace: (ROOT 5.26)
>>> ======================
>>>> #8 memcpy () at ../sysdeps/x86_64/memcpy.S:526
>>>> #9 0x00007f5cb7dcc492 in TBasket::ReadBasketBuffers (this=0x1bcb0d0,
>>>> pos=576290, len=219, file=0x20f0ee0) at tree/tree/src/TBasket.cxx:367
>>>> #10 0x00007f5cb7dd9896 in TBranch::GetBasket (this=0x1bcc500,
>>>> basketnumber=0) at tree/tree/src/TBranch.cxx:1068
>>>> #11 0x00007f5cb7dd9e05 in TBranch::GetEntry (this=0x1bcc500, entry=0,
>>>> getall=0) at tree/tree/src/TBranch.cxx:1170
>>>> #12 0x00007f5cb7667c78 in R__LoadBranch (br=0x1bcc500, entry=0,
>>>> quickLoad=true) at tree/treeplayer/src/TTreeFormula.cxx:98
>>>> #13 0x00007f5cb7679b39 in TTreeFormula::EvalInstance (this=0x1bcee20,
>>>> instance=0, stringStackArg=0x0) at
>>>> tree/treeplayer/src/TTreeFormula.cxx:3833
>>>> #14 0x00007f5cb765ede2 in TSelectorDraw::ProcessFill (this=0x1c2fdd0,
>>>> entry=0) at tree/treeplayer/src/TSelectorDraw.cxx:1091
>>>> #15 0x00007f5cb769755a in TTreePlayer::Process (this=0x1c30700,
>>>> selector=0x1c2fdd0, option=0x7f5cb7f1d400 "", nentries=553,
>>>> firstentry=0)
>>>> at tree/treeplayer/src/TTreePlayer.cxx:2796
>>>> #16 0x00007f5cb768dfb1 in TTreePlayer::DrawSelect (this=0x1c30700,
>>>> varexp0=0x7f5cb73aed73 "MET>>tmp_histo(100,0,100)",
>>>> selection=0x7f5cb7f1d400 "",
>>>> option=0x7f5cb7f1d400 "", nentries=1000000000, firstentry=0) at
>>>> tree/treeplayer/src/TTreePlayer.cxx:1073
>>>> #17 0x00007f5cb7e3a906 in TTree::Draw (this=0x1bcb720,
>>>> varexp=0x7f5cb73aed73 "MET>>tmp_histo(100,0,100)",
>>>> selection=0x7f5cb7f1d400 "", option=0x7f5cb7f1d400 "",
>>>> nentries=1000000000, firstentry=0) at tree/tree/src/TTree.cxx:3442
>>>> #18 0x00007f5cb7e1e7fc in TTree::Draw (this=0x1bcb720,
>>>> opt=0x7f5cb73aed73 "MET>>tmp_histo(100,0,100)") at include/TTree.h:259
>>>> #19 0x00007f5cb73adce5 in plot (key=0x1b35840, canvas=0x1c374b0) at
>>>> /home/jallad/codebaby/macros/sample.C:136
>>>> #20 0x00007f5cb73adbfd in read_dir (dir=0x1b63ad0, canvas=0x1c374b0)
>>>> at /home/jallad/codebaby/macros/sample.C:121
>>>> #21 0x00007f5cb73ad59f in overlay () at
>>>> /home/jallad/codebaby/macros/sample.C:51
>>>
>>
>
>
Received on Fri Jun 04 2010 - 10:31:47 CEST