289   struct BlockMeta {  struct in __anon451de9200211::BumpPointerAllocator
290     BlockMeta* Next;  argument
295   static constexpr size_t UsableAllocSize = AllocSize - sizeof(BlockMeta);
298   BlockMeta* BlockList = nullptr;
304     BlockList = new (NewMeta) BlockMeta{BlockList, 0};  in grow()
308     NBytes += sizeof(BlockMeta);  in allocateMassive()
309     BlockMeta* NewMeta = reinterpret_cast<BlockMeta*>(std::malloc(NBytes));  in allocateMassive()
312     BlockList->Next = new (NewMeta) BlockMeta{BlockList->Next, 0};  in allocateMassive()
318       : BlockList(new (InitialBuffer) BlockMeta{nullptr, 0}) {}  in BumpPointerAllocator()
334       BlockMeta* Tmp = BlockList;  in reset()
339     BlockList = new (InitialBuffer) BlockMeta{nullptr, 0};  in reset()