protection against null MF

cms-sw · Jul 8, 2013 · 2f33fb8 · 2f33fb8
1 parent 48bd73b
commit 2f33fb8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/TrackingTools/TrajectoryParametrization/interface/GlobalTrajectoryParameters.h b/TrackingTools/TrajectoryParametrization/interface/GlobalTrajectoryParameters.h
@@ -36,7 +36,7 @@ class GlobalTrajectoryParameters {
     theX(aX), theP(aP),     
     theCharge(aCharge)
   {
-    cachedMagneticField = theField->inTesla(theX);
+    cachedMagneticField = theField ? theField->inTesla(theX) : GlobalVector(0, 0, 0);
   } // we must initialize cache to non-NAN to avoid FPE
 
   /** Constructing class from global position, direction (unit length)