clarification

public/client/TracyProfiler.cpp

@@ -2148,9 +2148,15 @@ void Profiler::Worker()
     while( s_symbolThreadGone.load() == false ) { YieldThread(); }
 #endif
 
-    // Client is exiting.
 #ifdef TRACY_HAS_SYSTEM_TRACING
-    // Stop filling queues with new data.
+    // On a typical shutdown scenario, the (global) Profiler object is destroyed by
+    // the C++ runtime when the client program returns from "main", and ~Profiler()
+    // takes care of calling StopSystemTracing(). However, a client may decide to
+    // manually RequestShutdown(), in which case ~Profile() may not execute before
+    // this Worker() thread goes through its teardown stages and reaches this point.
+    // To ensure that system tracing does not keep pushing data to the worker queue 
+    // indefinitely (thus preventing this worker from terminating), we have to call
+    // StopSystemTracing() here as well to be safe:
     StopSystemTracing();
 #endif