Seastar cannot be compiled with gcc 13.1 and fmt lib version 10

```

In static member function ‘static constexpr _Up* std::__copy_move<_IsMove, true, std::random_access_iterator_tag>::__copy_m(_Tp*, _Tp*, _Up*) [with _Tp = unsigned int; _Up = unsigned int; bool _IsMove = false]’,

    inlined from ‘constexpr _OI std::__copy_move_a2(_II, _II, _OI) [with bool _IsMove = false; _II = unsigned int*; _OI = unsigned int*]’ at /usr/include/c++/13/bits/stl_algobase.h:506:30,

    inlined from ‘constexpr _OI std::__copy_move_a1(_II, _II, _OI) [with bool _IsMove = false; _II = unsigned int*; _OI = unsigned int*]’ at /usr/include/c++/13/bits/stl_algobase.h:533:42,

    inlined from ‘constexpr _OI std::__copy_move_a(_II, _II, _OI) [with bool _IsMove = false; _II = unsigned int*; _OI = unsigned int*]’ at /usr/include/c++/13/bits/stl_algobase.h:540:31,

    inlined from ‘constexpr _OI std::copy(_II, _II, _OI) [with _II = unsigned int*; _OI = unsigned int*]’ at /usr/include/c++/13/bits/stl_algobase.h:633:7,

    inlined from ‘static _ForwardIterator std::__uninitialized_copy<true>::__uninit_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = unsigned int*; _ForwardIterator = unsigned int*]’ at /usr/include/c++/13/bits/stl_uninitialized.h:147:27,

    inlined from ‘_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = unsigned int*; _ForwardIterator = unsigned int*]’ at /usr/include/c++/13/bits/stl_uninitialized.h:185:15,

    inlined from ‘constexpr void fmt::v9::basic_memory_buffer<T, SIZE, Allocator>::grow(size_t) [with T = unsigned int; long unsigned int SIZE = 32; Allocator = std::allocator<unsigned int>]’ at /usr/include/fmt/format.h:925:26,

    inlined from ‘constexpr void fmt::v9::detail::buffer<T>::try_reserve(size_t) [with T = unsigned int]’ at /usr/include/fmt/core.h:928:39,

    inlined from ‘constexpr void fmt::v9::detail::buffer<T>::try_reserve(size_t) [with T = unsigned int]’ at /usr/include/fmt/core.h:927:24,

    inlined from ‘constexpr void fmt::v9::detail::buffer<T>::try_resize(size_t) [with T = unsigned int]’ at /usr/include/fmt/core.h:919:16,

    inlined from ‘constexpr void fmt::v9::basic_memory_buffer<T, SIZE, Allocator>::resize(size_t) [with T = unsigned int; long unsigned int SIZE = 32; Allocator = std::allocator<unsigned int>]’ at /usr/include/fmt/format.h:897:63,

    inlined from ‘constexpr void fmt::v9::detail::bigint::assign(UInt) [with UInt = long unsigned int; typename std::enable_if<(std::is_same<UInt, long unsigned int>::value || std::is_same<UInt, __int128 unsigned>::value), int>::type <anonymous> = 0]’ at /usr/include/fmt/format.h:2792:19,

    inlined from ‘constexpr void fmt::v9::detail::bigint::operator=(Int) [with Int = int]’ at /usr/include/fmt/format.h:2813:11,

    inlined from ‘constexpr void fmt::v9::detail::bigint::assign_pow10(int)’ at /usr/include/fmt/format.h:2886:32:

/usr/include/c++/13/bits/stl_algobase.h:437:30: error: ‘void* __builtin_memmove(void*, const void*, long unsigned int)’ writing between 5 and 9223372036854775807 bytes into a region of size 4 overflows the destination [-Werror=stringop-overflow=]

  437 |             __builtin_memmove(__result, __first, sizeof(_Tp) * _Num);

      |             ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In file included from /usr/include/c++/13/x86_64-redhat-linux/bits/c++allocator.h:33,

                 from /usr/include/c++/13/bits/allocator.h:46,

                 from /usr/include/c++/13/string:43:



```



Can be reduced to https://godbolt.org/z/osqjxs8Wq



The issue seems to be worked around in fmt's master



Relevant discussion https://github.com/fmtlib/fmt/issues/3382



Reading quickly through it, they seem to have traced it to changes in implicit move rules, described in https://gcc.gnu.org/gcc-13/porting_to.html

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