From 12df959320262bb0fb00ed115b323d2134cf424e Mon Sep 17 00:00:00 2001
From: James William Monk <james.william.monk@cern.ch>
Date: Wed, 28 Oct 2015 16:04:47 +0100
Subject: [PATCH] tagging MG weights fix (Pythia8_i-00-12-03)
* Tag Pythia8_i-00-12-03
2015-10-23 James Monk <jmonk@cern.ch>
* Make sure m_internal_event_number is updated only if the event passes the CKKWL acceptance cuts.
Event number == 1 is used to initialise the weight names, so prior to this fix a crash was
possible if the very first event failed the acceptance cuts.
---
Generators/Pythia8_i/src/Pythia8_i.cxx | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/Generators/Pythia8_i/src/Pythia8_i.cxx b/Generators/Pythia8_i/src/Pythia8_i.cxx
index bee5ba18ef3..0607703006d 100644
--- a/Generators/Pythia8_i/src/Pythia8_i.cxx
+++ b/Generators/Pythia8_i/src/Pythia8_i.cxx
@@ -375,10 +375,9 @@ StatusCode Pythia8_i::callGenerator(){
returnCode = this->callGenerator();
}else{
m_nMerged += eventWeight;
+ ++m_internal_event_number;
}
- ++m_internal_event_number;
-
return returnCode;
}
--
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