[Runtime] print stats in the destructor not at exit

emper/Runtime.cpp

@@ -99,7 +99,6 @@ Runtime::Runtime(workerid_t workerCount, RuntimeStrategyFactory& strategyFactory
 
 		if constexpr (emper::STATS) {
 			globalIo->stats.workerId = emper::io::Stats::GLOBAL_COMPLETER_ID;
-			std::atexit(emper::io::Stats::printWorkerStats);
 		}
 	}
 
@@ -148,13 +147,6 @@ Runtime::Runtime(workerid_t workerCount, RuntimeStrategyFactory& strategyFactory
 
 	threadsRunning = true;
 
-	if constexpr (emper::STATS) {
-		int res = std::atexit(&printLastRuntimeStats);
-		if (res) {
-			DIE_MSG("could not register printStats() with at_exit()");
-		}
-	}
-
 	const std::string stacktraceOnAbortsEnvVar("EMPER_STACKTRACE_ON_ABORTS");
 	const char* envValueEnableStacktraces = std::getenv(stacktraceOnAbortsEnvVar.c_str());
 	if (envValueEnableStacktraces && !std::strcmp(envValueEnableStacktraces, "true")) {
@@ -169,6 +161,13 @@ Runtime::~Runtime() {
 		initiateAndWaitUntilTermination();
 	}
 
+	// Print the stats after all worker threads have terminated and before we delete
+	// objects bound to the runtime's lifetime
+	if constexpr (emper::STATS) {
+		printLastRuntimeStats();
+		emper::io::Stats::printWorkerStats();
+	}
+
 	for (unsigned int i = 0; i < workerCount; ++i) {
 		delete workers[i];
 	}