message: meshing: print debug info about length mismatchesg
diff: @@ -73,7 +73,8 @@ inline void randomSort(mt19937_64 &prng, size_t count, T *miniheaps,
  const auto len = h1->bitmap().byteCount();
  const auto bitmap1 = h1->bitmap().bitmap();
  const auto bitmap2 = h2->bitmap().bitmap();
  - d_assert(len == h2->bitmap().byteCount());
  + const auto len2 = h2->bitmap().byteCount();
  + d_assert_msg(len == h2->bitmap().byteCount(), "mismatched lengths? %zu != %zu", len, len2);
  if (mesh::bitmapsMeshable(bitmap1, bitmap2, len)) {
  internal::vector<T *> heaps{h1, h2};
  