Fix ASAN warnings with Cycles OSL

intern/cycles/render/nodes.h

@@ -1600,11 +1600,23 @@ class SetNormalNode : public ShaderNode {
   NODE_SOCKET_API(float3, direction)
 };
 
-class OSLNode : public ShaderNode {
+class OSLNode final : public ShaderNode {
  public:
   static OSLNode *create(ShaderGraph *graph, size_t num_inputs, const OSLNode *from = NULL);
   ~OSLNode();
 
+  static void operator delete(void *ptr)
+  {
+    /* Override delete operator to silence new-delete-type-mismatch ASAN warnings
+     * regarding size mismatch in the destructor. This is intentional as we allocate
+     * extra space at the end of the node. */
+    ::operator delete(ptr);
+  }
+  static void operator delete(void *, void *)
+  {
+    /* Deliberately empty placement delete operator, to avoid MSVC warning C4291. */
+  }
+
   ShaderNode *clone(ShaderGraph *graph) const;
 
   char *input_default_value();