chore: Move logging to where the messages get popped from queue

include/spdlog/async_logger-inl.h

@@ -62,16 +62,6 @@ SPDLOG_INLINE void spdlog::async_logger::backend_sink_it_(const details::log_msg
             SPDLOG_TRY
             {
                 sink->log(msg);
-
-                if (auto pool_ptr = thread_pool_.lock())
-                {
-                    auto lost_messages = pool_ptr->overrun_counter();
-                    if (lost_messages > 0) {
-                        sink->log(details::log_msg{name(), level::warn, fmt::format("Lost {} messages", lost_messages)});
-                        sink->flush();
-                        pool_ptr->reset_overrun_counter();
-                    }
-                }
             }
             SPDLOG_LOGGER_CATCH(msg.source)
         }

include/spdlog/details/thread_pool-inl.h

@@ -117,6 +117,13 @@ bool SPDLOG_INLINE thread_pool::process_next_msg_()
     switch (incoming_async_msg.msg_type)
     {
     case async_msg_type::log: {
+        auto lost_messages = overrun_counter();
+        if (lost_messages > 0)
+        {
+            incoming_async_msg.worker_ptr->backend_sink_it_(
+                details::log_msg{incoming_async_msg.worker_ptr->name(), level::debug, fmt::format("Lost {} messages", lost_messages)});
+            reset_overrun_counter();
+        }
         incoming_async_msg.worker_ptr->backend_sink_it_(incoming_async_msg);
         return true;
     }