Error on instantiating an incomplete type

[limdor]

It looks like in certain scenarios boost container is instantiating an incomplete type.

I could reproduce it in godbolt with EDG with boost.container 1.84
https://godbolt.org/z/87exK55q6

Looking a bit at the code, I belive the issue is still there in the current master.

We have a workaround that it is to include tuple in user code

#include <boost/tuple/tuple.hpp>

This is the error:

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 82: error: an incomplete class type is not allowed
      = __conditional_t<__is_final(_Tp), false_type,
                        ^
          detected during:
            instantiation of type "std::__empty_not_final<boost::tuples::null_type>" at line 86
            processing of template argument list for "std::_Head_base" based on template arguments <9UL, boost::tuples::null_type> at line 547
            instantiation of class "std::_Tuple_impl<_Idx, _Head> [with _Idx=9UL, _Head=boost::tuples::null_type]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=8UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=7UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            [ 10 instantiation contexts not shown ]
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 251: error: incomplete type "boost::tuples::null_type" is not allowed
        _Head _M_head_impl;
              ^
          detected during:
            instantiation of class "std::_Head_base<_Idx, _Head, false> [with _Idx=9UL, _Head=boost::tuples::null_type]" at line 547
            instantiation of class "std::_Tuple_impl<_Idx, _Head> [with _Idx=9UL, _Head=boost::tuples::null_type]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=8UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=7UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=6UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            [ 9 instantiation contexts not shown ]
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 251: error: incomplete type "boost::tuples::null_type" is not allowed
        _Head _M_head_impl;
              ^
          detected during:
            instantiation of class "std::_Head_base<_Idx, _Head, false> [with _Idx=8UL, _Head=boost::tuples::null_type]" at line 283
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=8UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=7UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=6UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=5UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            [ 8 instantiation contexts not shown ]
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 251: error: incomplete type "boost::tuples::null_type" is not allowed
        _Head _M_head_impl;
              ^
          detected during:
            instantiation of class "std::_Head_base<_Idx, _Head, false> [with _Idx=7UL, _Head=boost::tuples::null_type]" at line 283
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=7UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=6UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=5UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=4UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            [ 7 instantiation contexts not shown ]
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 251: error: incomplete type "boost::tuples::null_type" is not allowed
        _Head _M_head_impl;
              ^
          detected during:
            instantiation of class "std::_Head_base<_Idx, _Head, false> [with _Idx=6UL, _Head=boost::tuples::null_type]" at line 283
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=6UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=5UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=4UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=3UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            [ 6 instantiation contexts not shown ]
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 251: error: incomplete type "boost::tuples::null_type" is not allowed
        _Head _M_head_impl;
              ^
          detected during:
            instantiation of class "std::_Head_base<_Idx, _Head, false> [with _Idx=5UL, _Head=boost::tuples::null_type]" at line 283
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=5UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=4UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=3UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=2UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            [ 5 instantiation contexts not shown ]
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 251: error: incomplete type "boost::tuples::null_type" is not allowed
        _Head _M_head_impl;
              ^
          detected during:
            instantiation of class "std::_Head_base<_Idx, _Head, false> [with _Idx=4UL, _Head=boost::tuples::null_type]" at line 283
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=4UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=3UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=2UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=1UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            [ 4 instantiation contexts not shown ]
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 251: error: incomplete type "boost::tuples::null_type" is not allowed
        _Head _M_head_impl;
              ^
          detected during:
            instantiation of class "std::_Head_base<_Idx, _Head, false> [with _Idx=3UL, _Head=boost::tuples::null_type]" at line 283
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=3UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=2UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=1UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=0UL, _Head=int &&, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 833
            [ 3 instantiation contexts not shown ]
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 251: error: incomplete type "boost::tuples::null_type" is not allowed
        _Head _M_head_impl;
              ^
          detected during:
            instantiation of class "std::_Head_base<_Idx, _Head, false> [with _Idx=2UL, _Head=boost::tuples::null_type]" at line 283
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=2UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=1UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=0UL, _Head=int &&, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 833
            instantiation of class "std::tuple<_Elements...> [with _Elements=<int &&, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 813 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/scoped_allocator.hpp"
            [ 2 instantiation contexts not shown ]
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

"/cefs/22/22e6cdc013c8541ce3d1548e_consolidated/compilers_c++_x86_gcc_15.2.0/include/c++/15.2.0/tuple", line 251: error: incomplete type "boost::tuples::null_type" is not allowed
        _Head _M_head_impl;
              ^
          detected during:
            instantiation of class "std::_Head_base<_Idx, _Head, false> [with _Idx=1UL, _Head=boost::tuples::null_type]" at line 283
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=1UL, _Head=boost::tuples::null_type, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 282
            instantiation of class "std::_Tuple_impl<_Idx, _Head, _Tail...> [with _Idx=0UL, _Head=int &&, _Tail=<boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 833
            instantiation of class "std::tuple<_Elements...> [with _Elements=<int &&, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type>]" at line 813 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/scoped_allocator.hpp"
            instantiation of "void boost::container::scoped_allocator_adaptor<OuterAlloc, InnerAllocs...>::construct(T *, Args &&...) [with OuterAlloc=std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>, InnerAllocs=<>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 420 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/allocator_traits.hpp"
            instantiation of "void boost::container::allocator_traits<Allocator>::priv_construct(boost::move_detail::true_type, Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 369 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/allocator_traits.hpp"
            instantiation of "void boost::container::allocator_traits<Allocator>::construct(Allocator &, T *, Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, T=boost::container::dtl::pair<int, float>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 95 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::base_node<T, HookDefiner, PairBased>::base_node(Alloc &, Args &&...) [with T=std::pair<const int, float>, HookDefiner=boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, PairBased=true, Alloc=boost::container::scoped_allocator_adaptor<std::allocator<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>>>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 377 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/node_alloc_holder.hpp"
            instantiation of "boost::container::dtl::node_alloc_holder<Allocator, ICont>::NodePtr boost::container::dtl::node_alloc_holder<Allocator, ICont>::create_node(Args &&...) [with Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, ICont=boost::intrusive::rbtree_impl<boost::intrusive::bhtraits<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::intrusive::rbtree_node_traits<void *, true>, boost::intrusive::normal_link, boost::intrusive::hook_defaults::tag, 3U>, boost::container::dtl::key_of_node<boost::container::base_node<std::pair<const int, float>, boost::container::dtl::intrusive_tree_hook<void *, boost::container::red_black_tree, true>, true>, boost::container::dtl::select1st<const int>>, std::less<int>, boost::intrusive::bstree_defaults::size_type, true, boost::intrusive::bstree_defaults::header_holder_type>, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 966 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/detail/tree.hpp"
            instantiation of "std::pair<boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::iterator, bool> boost::container::dtl::tree<T, KeyOfValue, Compare, Allocator, Options>::emplace_unique(Args &&...) [with T=std::pair<const int, float>, KeyOfValue=int, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 858 of "/opt/compiler-explorer/libs/boost_1_84_0/boost/container/map.hpp"
            instantiation of "std::pair<boost::container::map<Key, T, Compare, Allocator, Options>::iterator, bool> boost::container::map<Key, T, Compare, Allocator, Options>::emplace(Args &&...) [with Key=int, T=float, Compare=std::less<int>, Allocator=boost::container::scoped_allocator_adaptor<std::allocator<std::pair<const int, float>>>, Options=void, Args=<const std::piecewise_construct_t &, std::tuple<int &&>, std::tuple<double &&>>]" at line 19 of "<source>"

10 errors detected in the compilation of "<source>".
Compiler returned: 2

[igaztanaga]

It seems to me as a EDG bug, Clang, GCC and MSVC work fine. I'm not sure how caould I debug this godbolt is not practical for this. have you further investigated this issue?

[limdor]

I did not dig deeper. To me from the error message and looking a bit in the code, it seemed to me that the include is really missing and the instantiation is happening.
Do you believe it is an EDG bug because you believe that you are not instantiating the type, because you instantiate the type but you have the full type definition available, or just based on the fact that it works on other compilers?

[igaztanaga]

The implementation of dtl::pair should SFINAE out the overload taking boost::tuples::null_type (and in fact it does so in other implementations). For some reason EDG is intantiating std::tuple<boost::tuples::null_type, ..> types.

The EDG compiler appears to be using GCC 15.2 standard library and GCC 15.2 in godbolt, using the same code, has no problem with the implemented approach. But it's difficult to find a workaround without a proper environment to reproduce and test alternatives or workaround for this EDG compiler.

[limdor]

Ok understood.
For a reproduction environment it might be hard. I got this issue with coverity and because I knew it was using EDG frontend I tried to see if I could provide a minimum reproducible example in godbolt. I guess for coverity you might have the same problem of not having access.
Already knowing that you believe it is a compiler bug is very helpful. I can report the issue to coverity. (I would report it to EDG but in general they only accept bug reports from their customers).