From a770f03056e374fa7c1dbdc06aaff22107fc27a0 Mon Sep 17 00:00:00 2001
From: Mattias Ellert <mattias.ellert@physics.uu.se>
Date: Thu, 15 Feb 2018 18:29:00 +0100
Subject: [PATCH] Protect against out-of-bounds access

---
 graf2d/gpad/src/TRatioPlot.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/graf2d/gpad/src/TRatioPlot.cxx b/graf2d/gpad/src/TRatioPlot.cxx
index 107c0c90806..bf3415d7927 100644
--- a/graf2d/gpad/src/TRatioPlot.cxx
+++ b/graf2d/gpad/src/TRatioPlot.cxx
@@ -1074,9 +1074,9 @@ Int_t TRatioPlot::BuildLowerPlot()
             ((TGraphAsymmErrors*)fRatioGraph)->SetPointError(ipoint,  fH1->GetBinWidth(i)/2., fH1->GetBinWidth(i)/2., 0.5, 0.5);
 
             fConfidenceInterval1->SetPoint(ipoint, x, 0);
-            fConfidenceInterval1->SetPointError(ipoint, x, ci1[i] / error);
+            fConfidenceInterval1->SetPointError(ipoint, x, i < ci1.size() ? ci1[i] / error : 0);
             fConfidenceInterval2->SetPoint(ipoint, x, 0);
-            fConfidenceInterval2->SetPointError(ipoint, x, ci2[i] / error);
+            fConfidenceInterval2->SetPointError(ipoint, x, i < ci2.size() ? ci2[i] / error : 0);
 
             ++ipoint;