Problem 2518

Summary:	Null pointer dereference in G4AnalysisManager::GetNofNtuples()
Product:	Geant4	Reporter:	Luigi Pertoldi <gipert>
Component:	analysis	Assignee:	Ivana Hrivnacova <ivana>
Status:	RESOLVED FIXED
Severity:	major
Priority:	P4
Version:	11.0
Hardware:	All
OS:	Linux

Description Luigi Pertoldi 2022-11-11 19:11:38 CET

Adding

G4AnalysisManager::Instance()->GetNofNtuples();

in RunAction::RunAction() of example B4/B4b leads to an invalid pointer reference, therefore a segfault. This looks like a bug to me.

Comment 1 Ivana Hrivnacova 2022-11-14 10:08:23 CET

Hello,

There was indeed missing a protection against nullptr; the bug is now fixed in the Geant4 development version and the fix is also proposed for the next patch to Geant4 11.

Best regards,