Fix double stop in ANSVideoPlayer

modules/ANSODEngine/engine.h

@@ -434,6 +434,16 @@ private:
     // the first time each batch size is seen; subsequent calls reuse it.
     std::unordered_map<int, cudaGraphExec_t>  m_graphExecs;
 
+    // Leak diagnostics — per-engine-instance counters for CUDA graph
+    // create/destroy balance. Incremented in EngineRunInference.inl and
+    // EngineBuildLoadNetwork.inl. Read by the [TRT_Leak] heartbeat in
+    // runInference (fires ≤1×/60s per engine instance).
+    // m_trtLeakNextLogTick stores a steady_clock epoch count for lock-free
+    // compare_exchange window claim across concurrent inference threads.
+    std::atomic<int64_t>                      m_trtGraphCreates{0};
+    std::atomic<int64_t>                      m_trtGraphDestroys{0};
+    std::atomic<long long>                    m_trtLeakNextLogTick{0};
+
     Logger m_logger;
     bool m_verbose{ true };   // false for non-probe pool slots
     bool m_disableGraphs{ true }; // DISABLED by default — concurrent graph launches + uploads cause GPU deadlock on WDDM
@@ -569,7 +579,12 @@ template <typename T> Engine<T>::~Engine() {
 
     // Destroy cached CUDA graphs
     try {
-        for (auto& [bs, ge] : m_graphExecs) { if (ge) cudaGraphExecDestroy(ge); }
+        for (auto& [bs, ge] : m_graphExecs) {
+            if (ge) {
+                cudaGraphExecDestroy(ge);
+                m_trtGraphDestroys.fetch_add(1, std::memory_order_relaxed);
+            }
+        }
         m_graphExecs.clear();
     } catch (...) {}