From 076316f11ea3beb737adbfdaa432c13f45ac95ed Mon Sep 17 00:00:00 2001
From: Manuel Huber <ManuelHu@users.noreply.github.com>
Date: Tue, 17 Dec 2024 11:13:45 +0100
Subject: [PATCH] terminate run as fast as possible if any output file exists

---
 src/RMGRunAction.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/RMGRunAction.cc b/src/RMGRunAction.cc
index 169fce69..1f14e571 100644
--- a/src/RMGRunAction.cc
+++ b/src/RMGRunAction.cc
@@ -242,8 +242,10 @@ std::pair<fs::path, fs::path> RMGRunAction::BuildOutputFile() const {
   auto path_for_overwrite =
       fs::path(G4Analysis::GetTnFileName(path.string(), path.extension().string()));
   if (fs::exists(path_for_overwrite) && !manager->GetOutputOverwriteFiles()) {
-    G4RunManager::GetRunManager()->AbortRun(true);
     RMGLog::Out(RMGLog::error, "Output file ", path_for_overwrite.string(), " does already exists.");
+    // need to abort here (and not use ::fatal), as Geant4 is not prepared to take exceptions at this stage.
+    // also, there is no clean way to abort an run before the run started.
+    std::abort();
   }
 
   auto ext = path.extension();