Additional protection, for the Savannah ticket #68145 (M. Ivanov)

[u/mrichter/AliRoot.git] / STEER / AliExternalTrackParam.cxx

diff --git a/STEER/AliExternalTrackParam.cxx b/STEER/AliExternalTrackParam.cxx
index 153fb6c9344293998ad190c81dd5d2a38bd9e41f..2d2ad64ac9bb558b2c3cda3b1633938962cb4cb6 100644 (file)
--- a/STEER/AliExternalTrackParam.cxx
+++ b/STEER/AliExternalTrackParam.cxx
@@ -1852,6 +1852,7 @@ Bool_t AliExternalTrackParam::PropagateToBxByBz(Double_t xk, const Double_t b[3]
 
   Double_t dx=xk-fX;
   if (TMath::Abs(dx)<=kAlmost0)  return kTRUE;
+  if (TMath::Abs(fP[4])<=kAlmost0) return kFALSE;
 
   Double_t crv=GetC(b[2]);
   if (TMath::Abs(b[2]) < kAlmost0Field) crv=0.;