message: Silence warning on GCC
diff: @@ -82,7 +82,7 @@ private:
  data& operator=(const data&) = delete;
  explicit data(bool bin, size_t size) : rc_(1), bin_(bin), size_(size) {
  - // nop
  + static_cast<void>(padding_); // Silence unused-private-field warning.
  }
  // -- reference counting ---------------------------------------------------
  @@ -127,7 +127,7 @@ private:
  static constexpr size_t padding_size = CAF_CACHE_LINE_SIZE
  - sizeof(std::atomic<size_t>);
  mutable std::atomic<size_t> rc_;
  - [[maybe_unused]] std::byte padding_[padding_size];
  + std::byte padding_[padding_size];
  bool bin_;
  size_t size_;
  std::byte storage_[];
  