290   struct BlockMeta {  struct in __anon67b5abab0211::BumpPointerAllocator
291     BlockMeta* Next;  argument
296   static constexpr size_t UsableAllocSize = AllocSize - sizeof(BlockMeta);
299   BlockMeta* BlockList = nullptr;
305     BlockList = new (NewMeta) BlockMeta{BlockList, 0};  in grow()
309     NBytes += sizeof(BlockMeta);  in allocateMassive()
310     BlockMeta* NewMeta = reinterpret_cast<BlockMeta*>(std::malloc(NBytes));  in allocateMassive()
313     BlockList->Next = new (NewMeta) BlockMeta{BlockList->Next, 0};  in allocateMassive()
319       : BlockList(new (InitialBuffer) BlockMeta{nullptr, 0}) {}  in BumpPointerAllocator()
335       BlockMeta* Tmp = BlockList;  in reset()
340     BlockList = new (InitialBuffer) BlockMeta{nullptr, 0};  in reset()