From e9e0626bba613d3a23c96b5b58648951b134dc68 Mon Sep 17 00:00:00 2001
From: Vladimir <Vladimir.Ivantchenko@cern.ch>
Date: Sat, 27 Jan 2018 21:13:33 +0100
Subject: [PATCH] fixed thread safety

---
 Mixing/Base/src/PileUp.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Mixing/Base/src/PileUp.cc b/Mixing/Base/src/PileUp.cc
index eec86569e2796..6442045938e3e 100644
--- a/Mixing/Base/src/PileUp.cc
+++ b/Mixing/Base/src/PileUp.cc
@@ -68,7 +68,7 @@ namespace edm {
     Source_type_(config->sourcename_),
     averageNumber_(config->averageNumber_),
     intAverage_(static_cast<int>(averageNumber_)),
-    histo_(config->histo_),
+    histo_(std::make_shared<TH1F>(*config->histo_)),
     histoDistribution_(type_ == "histo"),
     probFunctionDistribution_(type_ == "probFunction"),
     poisson_(type_ == "poisson"),