From ec22b622e8babb7c8fdca31e64ae9f271f9af336 Mon Sep 17 00:00:00 2001
From: Goetz Gaycken <goetz.gaycken@cern.ch>
Date: Wed, 22 May 2019 14:34:04 +0200
Subject: [PATCH] Protection against division by zero (obo Igor Gavrilenko)
---
.../src/SiTrajectoryElement_xk.cxx | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/InnerDetector/InDetRecTools/SiCombinatorialTrackFinderTool_xk/src/SiTrajectoryElement_xk.cxx b/InnerDetector/InDetRecTools/SiCombinatorialTrackFinderTool_xk/src/SiTrajectoryElement_xk.cxx
index b419898b59a..d8448325701 100644
--- a/InnerDetector/InDetRecTools/SiCombinatorialTrackFinderTool_xk/src/SiTrajectoryElement_xk.cxx
+++ b/InnerDetector/InDetRecTools/SiCombinatorialTrackFinderTool_xk/src/SiTrajectoryElement_xk.cxx
@@ -1274,7 +1274,8 @@ void InDet::SiTrajectoryElement_xk::noiseProduction
m_radlengthN = s*m_radlength;
double covariancePola = (134.*m_radlengthN)*(q*q);
- double covarianceAzim = covariancePola/((1.-m_A[2])*(1.+m_A[2]));
+ double d = (1.-m_A[2])*(1.+m_A[2]); if(d < 1.e-5) d = 1.e-5;
+ double covarianceAzim = covariancePola/d;
double covarianceIMom,correctionIMom;
if(Model==1) {
--
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