message: non constexpr array
diff: @@ -65,7 +65,7 @@ class ThreadSafeIndex {
  // Lookup table for the order points in a group should be read in. This is
  // simply a list from 0 to 1023 where each number has had the order of its
  // bits reversed.
  - static constexpr std::array<size_t, step_size_> offset_lookup_ = {
  + static const std::array<size_t, step_size_> offset_lookup_ = {
  {0, 512, 256, 768, 128, 640, 384, 896, 64, 576, 320, 832,
  192, 704, 448, 960, 32, 544, 288, 800, 160, 672, 416, 928,
  96, 608, 352, 864, 224, 736, 480, 992, 16, 528, 272, 784,
  