Problem 2461

Summary:	Bug in G4UserTrackingAction::PostUserTrackingAction(const G4Track* track)
Product:	Geant4	Reporter:	Linmao Li <llm20>
Component:	tracking	Assignee:	Takashi.Sasaki
Status:	RESOLVED INVALID
Severity:	minor
Priority:	P4
Version:	10.7
Hardware:	PC
OS:	All
Attachments:	The class I derived from G4UserTrackingAction The definition of "PostUserTrackingAction(const G4Track*)" The program crashed

Description Linmao Li 2022-01-05 07:43:06 CET

When a member function of "track" such as "track->GetCreatorProcess()" is called in "G4UserTrackingAction::PostUserTrackingAction(const G4Track* track)", i.e., "fpUserTrackingAction->PostUserTrackingAction(fpTrack);" in "G4TrackingManager::ProcessOneTrack(G4Track* apValueG4Track)", a "segmentation fault" error will ocuur.

Comment 1 Takashi.Sasaki 2022-01-05 07:55:33 CET

UserTrackingAction is what you provided. Debug your code, please.

Comment 2 Linmao Li 2022-01-11 09:25:59 CET

Created attachment 744 [details]
The class I derived from G4UserTrackingAction

The header of the class I derived from G4UserTrackingAction

Comment 3 Linmao Li 2022-01-11 09:27:24 CET

Created attachment 745 [details]
The definition of "PostUserTrackingAction(const G4Track*)"

Comment 4 Linmao Li 2022-01-11 09:41:10 CET

Created attachment 746 [details]
The program crashed

Comment 5 Linmao Li 2022-01-11 09:43:34 CET

Maybe I didn't make it clear.

I created "class TrackingAction" derived from "G4UserTrackingAction".
Then I overrode the member function "virtual void PostUserTrackingAction(const G4Track*)", where I call the member functions of "G4Track", for example, "G4String creatorProcessName = track->GetCreatorProcess()->GetProcessName();"
Then the program crashed。

You can see the pictures I submitted.

Comment 6 Takashi.Sasaki 2022-01-11 09:47:38 CET

Please debug your program by yourself. I cannot afford to help you privately. We, developers, are unpaid volunteers.