Devel::Mwrap::reset is a no-op if `totals' not initialized

Don't segfault in case we fail to create rculfhash.

1 files changed, 9 insertions, 8 deletions

diff --git a/Mwrap.xs b/Mwrap.xs
index 518edb1..e87fe30 100644
--- a/Mwrap.xs
+++ b/Mwrap.xs
@@ -909,14 +909,15 @@ CODE:
 
         rcu_read_lock();
         t = CMM_LOAD_SHARED(totals);
-        cds_lfht_for_each_entry(t, &iter, l, hnode) {
-                uatomic_set(&l->total, 0);
-                uatomic_set(&l->allocations, 0);
-                uatomic_set(&l->frees, 0);
-                uatomic_set(&l->freed_bytes, 0);
-                uatomic_set(&l->age_total, 0);
-                uatomic_set(&l->max_lifespan, 0);
-        }
+        if (t)
+                cds_lfht_for_each_entry(t, &iter, l, hnode) {
+                        uatomic_set(&l->total, 0);
+                        uatomic_set(&l->allocations, 0);
+                        uatomic_set(&l->frees, 0);
+                        uatomic_set(&l->freed_bytes, 0);
+                        uatomic_set(&l->age_total, 0);
+                        uatomic_set(&l->max_lifespan, 0);
+                }
         rcu_read_unlock();
 
 Devel::Mwrap::SrcLoc