[mc] Add support of privatized global variables in per-page snapshot

[simgrid.git] / src / mc / mc_compare.cpp

diff --git a/src/mc/mc_compare.cpp b/src/mc/mc_compare.cpp
index 6eaa3bf..ada39e6 100644 (file)
--- a/src/mc/mc_compare.cpp
+++ b/src/mc/mc_compare.cpp
@@ -246,6 +246,8 @@ static int compare_global_variables(int region_type, mc_mem_region_t r1,
                                     mc_mem_region_t r2, mc_snapshot_t snapshot1,
                                     mc_snapshot_t snapshot2)
 {
+  xbt_assert(r1 && r2,
+    "Missing region. Did you enable SMPI privatisation? It is not compatible with state comparison.");
   struct mc_compare_state state;
 
   xbt_dynar_t variables;