SegFault on GetEntry

[jstock]

Hi experts,

I am trying to run a “flattener” over a TTree I have made using my own event loop, but when I run tchain->GetEntry(X) I get a segfault. I have been smashing my head against this for way to long and can’t figure out what exactly is going wrong. I hope someone can help expand my knowledge.

Steps to recreate this bug.

Run Interacitvely

.L ShortTreeReader.C
TreeReader()

I may as well include ShortTreeReader.C here, as it is simple enough.

` 1 #include "EventRecord.h" `
  2   
  3 #ifndef CalibTreeReader_H  
  4 #define CalibTreeReader_H  
  5   
  6 void TreeReader(){  
  7   //TFile* f = new TFile("CalibTree_RSources_wbkg_test.root");  
  8   string outname = "test";  
  9   TChain* ch = new TChain("calibTree/CalibrationRecordTree");  
 10   ch->Add("CalibTree_RSources_wbkg_test.root");  
 11   EventRecord::EventRecord* event;  
 12   ch->SetBranchAddress("event_records", &event);  
 13   std::cout<<"43\n";  
 14   
 15   Int_t mevt = ch->GetEntries();  
 16   
 17   for(int nevt=0; nevt<mevt; ++nevt){  
 18     ch->GetEntry(nevt);  
 19     std::cout<<"Successs. The Run Number is   :"<<event->run<<"\n";  
 20   }  
 21   
 22   
 23 }  
 24   
 25 #endif  
`

I have a single event available for use in testing, the event class, and the tree reader at
https://drive.google.com/open?id=1I8iFyqdXc3OFLt646joSDBt82RcPGjsJ

I have confirmed that it is in GetEntry that the segfault happens, but I am inexperienced with using gdb on interpreted root macros and have been unable to progress further.

The stack trace from the crash is
https://paste.fedoraproject.org/paste/nTS0H3Gq7XWDx1yQpQhA6A

Cheers, and thanks in advance for any help offered.
-Jason

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ROOT Version (e.g. 6.12/02):
Fedora 27, gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)

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[Wile_E_Coyote]

 11   EventRecord::EventRecord *event = 0;

 21   delete ch;
 22   delete event; // cleanup