4706 class arena  class
4721     arena() noexcept : ptr_(buf_) {}  in arena()  function in __cxxabiv1::__anoncb1715b80111::arena
4722     ~arena() {ptr_ = nullptr;}  in ~arena()
4723     arena(const arena&) = delete;
4724     arena& operator=(const arena&) = delete;
4736 arena<N>::allocate(std::size_t n)  in allocate()
4750 arena<N>::deallocate(char* p, std::size_t n) noexcept  in deallocate()
4765     arena<N>& a_;
4772     short_alloc(arena<N>& a) noexcept : a_(a) {}  in short_alloc()
4887     Db(arena<N>& ar) :  in Db()
4908     arena<bs> a;  in __cxa_demangle()