MetricCollector.h: Add check to prevent mgr from crashing

Fixes: https://tracker.ceph.com/issues/52801
Signed-off-by: Aswin Toni <aswin.toni@cern.ch>

diff --git a/src/mgr/MetricCollector.h b/src/mgr/MetricCollector.h
index 19a3eed9b0aba5b4053f2c7017580329b17b262e..65e71e276e4326ee537d576d3783018f52a8d5a4 100644 (file)
--- a/src/mgr/MetricCollector.h
+++ b/src/mgr/MetricCollector.h
@@ -42,7 +42,9 @@ public:
       auto result_it = result.insert({query, {}}).first;
       if (is_limited(limits)) {
         for (auto& limit : limits) {
-          result_it->second.insert(*limit.second);
+          if (limit.second) {
+            result_it->second.insert(*limit.second);
+          }
         }
       }
     }