1 files changed, 4 insertions, 0 deletions
diff --git a/src/or/consdiffmgr.c b/src/or/consdiffmgr.c
index 8c25ff201c..c5f55b6f3f 100644
--- a/src/or/consdiffmgr.c
+++ b/src/or/consdiffmgr.c
@@ -283,6 +283,10 @@ cdm_diff_ht_set_status(consensus_flavor_t flav,
                        int status,
                        consensus_cache_entry_handle_t *handle)
 {
+  if (handle == NULL) {
+    tor_assert_nonfatal(status != CDM_DIFF_PRESENT);
+  }
+
   struct cdm_diff_t search, *ent;
   memset(&search, 0, sizeof(cdm_diff_t));
   search.flavor = flav;