diff --git a/src/backward.h b/src/backward.h
index 940116e..c924a70 100644
--- a/src/backward.h
+++ b/src/backward.h
@@ -3057,7 +3057,7 @@ class TraceResolverDarwinImpl<trace_resolver_tag::backtrace_symbol> : public Tra
         if (st.size() == 0) {
             return;
         }
-        _symbols.reset(backtrace_symbols(st.begin(), st.size()));
+        _symbols.reset(backtrace_symbols(st.begin(), (int) st.size()));
     }
 
     ResolvedTrace resolve(ResolvedTrace trace)
diff --git a/src/runtime.cpp b/src/runtime.cpp
index 2c12542..53aa2fb 100644
--- a/src/runtime.cpp
+++ b/src/runtime.cpp
@@ -19,6 +19,7 @@
 #include "aws/logging/logging.h"
 #include "aws/http/response.h"
 
+#include <chrono>
 #include <curl/curl.h>
 #include <curl/curlver.h>
 #include <climits> // for ULONG_MAX
@@ -27,6 +28,7 @@
 #include <array>
 #include <cstdlib> // for strtoul
 #include <cinttypes>
+#include <thread>
 
 #define AWS_LAMBDA_RUNTIME_API __attribute__((visibility("default")))
 
@@ -395,9 +397,23 @@ static bool handle_post_outcome(runtime::post_outcome const& o, std::string cons
     return false;
 }
 
+void listen_messages(std::function<invocation_response(invocation_request const&)> const& handler) {
+    logging::log_info(LOG_TAG, "Executing thread");
+    std::this_thread::sleep_for(std::chrono::milliseconds (20000));
+    run_handler(handler);
+}
+
+void start_listener(std::function<invocation_response(invocation_request const&)> const& handler) {
+    logging::log_info(LOG_TAG, "Starting listener");
+    std::thread t1(listen_messages, handler);
+    t1.detach();
+}
+
 AWS_LAMBDA_RUNTIME_API
 void run_handler(std::function<invocation_response(invocation_request const&)> const& handler)
 {
+    start_listener(handler);
+
     logging::log_info(LOG_TAG, "Initializing the C++ Lambda Runtime version %s", aws::lambda_runtime::get_version());
     std::string endpoint("http://");
     if (auto ep = std::getenv("AWS_LAMBDA_RUNTIME_API")) {