Unregister destroyed nodes from C++ graph_node_registry

When a node is destroyed, the driver may reuse its CUgraphNode pointer
for a new node. Without unregistering the old entry, the registry
returns a stale handle pointing to the wrong node type and graph.

Made-with: Cursor

Author: Andy-Jost

cuda_core/cuda/core/_cpp/resource_handles.cpp

@@ -991,6 +991,10 @@ GraphHandle graph_node_get_graph(const GraphNodeHandle& h) noexcept {
 
 void invalidate_graph_node_handle(const GraphNodeHandle& h) noexcept {
     if (h) {
+        CUgraphNode node = get_box(h)->resource;
+        if (node) {
+            graph_node_registry.unregister_handle(node);
+        }
         get_box(h)->resource = nullptr;
     }
 }