GSI Forum: Bugs, Fixes, Releases

Home » PANDA » PandaRoot » Bugs, Fixes, Releases » crash

Show: Today's Messages :: Polls :: Message Navigator

crash [message #20363]

Thu, 23 February 2017 00:57

Gianluigi Boca
Messages: 177
Registered: March 2004

first-grade participant

From: *pv.infn.it

Hi,
does anyone know why within the Init or Exec method of a class,
let's say in

sttmvdtracking/PndMixBackgroundEvents.cxx

class, the following very normal statements lead to an inexplicable
crash ?

TFile *f = new TFile("../dpm/digi_complete.root");
TTree * fTree = (TTree*) f->Get("cbmsim");
TClonesArray * fClone;
fTree->SetBranchAddress("MVDPixelDigis",&fClone);
fTree->GetEntry(5); // it crashes here

Note that other things like

fTree->Print()

for instance give a quite normal usual output. The file ../dpm/digi_complete.root
has been generated with the standard sim_complete.C and digi_complete.C
Macros in the trunk repository.

The crash doesn't happen if I do the same statements within the

root

interactive command.

Thanks in advance
Gianluigi

Report message to a moderator

Re: crash [message #20370 is a reply to message #20363]

Thu, 23 February 2017 21:01

Tobias Stockmanns
Messages: 489
Registered: May 2007

first-grade participant

From: *netcologne.de

Dear Gianluigi,

the problem is the line:

TClonesArray* fClone;

You do not allocate memory for the TClonesArray which causes the crash.
Replace it with:

TClonesArray* fClone = new TClonesArray("PndSdsDigiPixel");

Cheers,

Tobias

Report message to a moderator

Previous Topic:	svn error when updating pandaroot on kronos
Next Topic:	New PandaRoot release feb17

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Mar 20 18:14:05 CET 2026

Total time taken to generate the page: 0.00605 seconds