From 58d32a4d0e85df807f254fb795865ef6cc64f869 Mon Sep 17 00:00:00 2001
From: Peter Boyle <paboyle@ph.ed.ac.uk>
Date: Sun, 10 May 2015 15:24:37 +0100
Subject: [PATCH] Assertion should never hit, but did due to a bug

---
 lib/lattice/Grid_lattice_reduction.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/lattice/Grid_lattice_reduction.h b/lib/lattice/Grid_lattice_reduction.h
index 6679f29b..679effb0 100644
--- a/lib/lattice/Grid_lattice_reduction.h
+++ b/lib/lattice/Grid_lattice_reduction.h
@@ -83,6 +83,7 @@ template<class vobj> inline void sliceSum(const Lattice<vobj> &Data,std::vector<
   typedef typename vobj::scalar_object sobj;
 
   GridBase  *grid = Data._grid;
+  assert(grid!=NULL);
   const int    Nd = grid->_ndimension;
   const int Nsimd = grid->Nsimd();