Compilation problems on Arch Linux with 10.1.0

[bwalle]

Describe the bug

Compilation fails on my setup

System:

• Nheko version: git
• Installation method: compile from source
• Operating System: Arch Linux
• Qt version: 5.14.2-2
• C++ compiler: 10.1.0
• Desktop Environment: Xfce

Logs

[  3%] Building CXX object CMakeFiles/nheko.dir/src/dialogs/FallbackAuth.cpp.o
In file included from /usr/include/qt/QtCore/qglobal.h:45,
                 from /usr/include/qt/QtGui/qtguiglobal.h:43,
                 from /usr/include/qt/QtGui/qdesktopservices.h:43,
                 from /usr/include/qt/QtGui/QDesktopServices:1,
                 from /home/bw/devel/oss-repos/nheko/src/dialogs/FallbackAuth.cpp:1:
/usr/include/c++/10.1.0/type_traits: In instantiation of 'struct std::is_constructible<nlohmann::basic_json<>, const nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&>':
/usr/include/nlohmann/json.hpp:11120:79:   required by substitution of 'template<class ... Args, typename std::enable_if<std::is_constructible<nlohmann::basic_json<>, Args ...>::value, int>::type <anonymous> > nlohmann::detail::json_ref<nlohmann::basic_json<> >::json_ref(Args&& ...) [with Args = {const nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&}; typename std::enable_if<std::is_constructible<nlohmann::basic_json<>, Args ...>::value, int>::type <anonymous> = <missing>]'
/usr/include/c++/10.1.0/type_traits:901:30:   required from 'struct std::__is_constructible_impl<nlohmann::basic_json<>, const nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&>'
/usr/include/c++/10.1.0/type_traits:930:12:   required from 'struct std::__is_copy_constructible_impl<nlohmann::basic_json<>, true>'
/usr/include/c++/10.1.0/type_traits:936:12:   required from 'struct std::is_copy_constructible<nlohmann::basic_json<> >'
/usr/include/c++/10.1.0/type_traits:3111:33:   required from 'constexpr const bool std::is_copy_constructible_v<nlohmann::basic_json<> >'
/usr/include/c++/10.1.0/variant:294:5:   [ skipping 4 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/c++/10.1.0/bits/hashtable_policy.h:233:43:   required from 'struct std::__detail::_Hash_node_value_base<std::pair<const std::__cxx11::basic_string<char>, std::variant<mtx::user_interactive::OAuth2Params, mtx::user_interactive::TermsParams, nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >'
/usr/include/c++/10.1.0/bits/hashtable_policy.h:264:12:   required from 'struct std::__detail::_Hash_node<std::pair<const std::__cxx11::basic_string<char>, std::variant<mtx::user_interactive::OAuth2Params, mtx::user_interactive::TermsParams, nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, true>'
/usr/include/c++/10.1.0/bits/hashtable_policy.h:1973:13:   required from 'struct std::__detail::_Hashtable_alloc<std::allocator<std::__detail::_Hash_node<std::pair<const std::__cxx11::basic_string<char>, std::variant<mtx::user_interactive::OAuth2Params, mtx::user_interactive::TermsParams, nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, true> > >'
/usr/include/c++/10.1.0/bits/hashtable.h:173:11:   required from 'class std::_Hashtable<std::__cxx11::basic_string<char>, std::pair<const std::__cxx11::basic_string<char>, std::variant<mtx::user_interactive::OAuth2Params, mtx::user_interactive::TermsParams, nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >, std::allocator<std::pair<const std::__cxx11::basic_string<char>, std::variant<mtx::user_interactive::OAuth2Params, mtx::user_interactive::TermsParams, nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > > >, std::__detail::_Select1st, std::equal_to<std::__cxx11::basic_string<char> >, std::hash<std::__cxx11::basic_string<char> >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >'
/usr/include/c++/10.1.0/bits/unordered_map.h:105:18:   required from 'class std::unordered_map<std::__cxx11::basic_string<char>, std::variant<mtx::user_interactive::OAuth2Params, mtx::user_interactive::TermsParams, nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >'
/home/bw/.cache/yay/mtxclient/src/mtxclient-0.3.0/include/mtx/user_interactive.hpp:78:46:   required from here
/usr/include/c++/10.1.0/type_traits:906:12: error: invalid use of incomplete type 'struct std::__is_constructible_impl<nlohmann::basic_json<>, const nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&>'
  906 |     struct is_constructible
      |            ^~~~~~~~~~~~~~~~
/usr/include/c++/10.1.0/type_traits:900:12: note: declaration of 'struct std::__is_constructible_impl<nlohmann::basic_json<>, const nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&>'
  900 |     struct __is_constructible_impl
      |            ^~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/10.1.0/vector:66,
                 from /usr/include/c++/10.1.0/functional:62,
                 from /usr/include/c++/10.1.0/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/10.1.0/algorithm:74,
                 from /usr/include/qt/QtCore/qglobal.h:142,
                 from /usr/include/qt/QtGui/qtguiglobal.h:43,
                 from /usr/include/qt/QtGui/qdesktopservices.h:43,
                 from /usr/include/qt/QtGui/QDesktopServices:1,
                 from /home/bw/devel/oss-repos/nheko/src/dialogs/FallbackAuth.cpp:1:
/usr/include/c++/10.1.0/bits/stl_uninitialized.h: In instantiation of '_ForwardIterator std::uninitialized_copy(_InputIterator, _InputIterator, _ForwardIterator) [with _InputIterator = __gnu_cxx::__normal_iterator<const nlohmann::basic_json<>*, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > > >; _ForwardIterator = nlohmann::basic_json<>*]':
/usr/include/c++/10.1.0/bits/stl_uninitialized.h:325:37:   required from '_ForwardIterator std::__uninitialized_copy_a(_InputIterator, _InputIterator, _ForwardIterator, std::allocator<_Tp>&) [with _InputIterator = __gnu_cxx::__normal_iterator<const nlohmann::basic_json<>*, std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > > >; _ForwardIterator = nlohmann::basic_json<>*; _Tp = nlohmann::basic_json<>]'
/usr/include/c++/10.1.0/bits/stl_vector.h:558:31:   required from 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&) [with _Tp = nlohmann::basic_json<>; _Alloc = std::allocator<nlohmann::basic_json<> >]'
/usr/include/c++/10.1.0/ext/new_allocator.h:150:4:   required from 'void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >; _Args = {const std::vector<nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}; _Tp = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >]'
/usr/include/c++/10.1.0/bits/alloc_traits.h:512:17:   required from 'static void std::allocator_traits<std::allocator<_Tp1> >::construct(std::allocator_traits<std::allocator<_Tp1> >::allocator_type&, _Up*, _Args&& ...) [with _Up = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >; _Args = {const std::vector<nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>, std::allocator<nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer> > >&}; _Tp = std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > >; std::allocator_traits<std::allocator<_Tp1> >::allocator_type = std::allocator<std::vector<nlohmann::basic_json<>, std::allocator<nlohmann::basic_json<> > > >]'
/usr/include/nlohmann/json.hpp:15381:35:   [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/nlohmann/json.hpp:16365:25:   required from 'nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer>::basic_json(const nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer>&) [with ObjectType = std::map; ArrayType = std::vector; StringType = std::__cxx11::basic_string<char>; BooleanType = bool; NumberIntegerType = long int; NumberUnsignedType = long unsigned int; NumberFloatType = double; AllocatorType = std::allocator; JSONSerializer = nlohmann::adl_serializer]'
/usr/include/nlohmann/json.hpp:4737:31:   required from 'bool nlohmann::detail::json_sax_dom_callback_parser<BasicJsonType>::end_object() [with BasicJsonType = nlohmann::basic_json<>]'
/usr/include/nlohmann/json.hpp:8847:33:   required from 'bool nlohmann::detail::parser<BasicJsonType>::sax_parse_internal(SAX*) [with SAX = nlohmann::detail::json_sax_dom_callback_parser<nlohmann::basic_json<> >; BasicJsonType = nlohmann::basic_json<>]'
/usr/include/nlohmann/json.hpp:8738:31:   required from 'void nlohmann::detail::parser<BasicJsonType>::parse(bool, BasicJsonType&) [with BasicJsonType = nlohmann::basic_json<>]'
/usr/include/nlohmann/json.hpp:20882:79:   required from 'static nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer> nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer>::parse(IteratorType, IteratorType, nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer>::parser_callback_t, bool) [with IteratorType = const char*; typename std::enable_if<std::is_base_of<std::random_access_iterator_tag, typename std::iterator_traits<_InputIterator>::iterator_category>::value, int>::type <anonymous> = 0; ObjectType = std::map; ArrayType = std::vector; StringType = std::__cxx11::basic_string<char>; BooleanType = bool; NumberIntegerType = long int; NumberUnsignedType = long unsigned int; NumberFloatType = double; AllocatorType = std::allocator; JSONSerializer = nlohmann::adl_serializer; nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer>::parser_callback_t = std::function<bool(int, nlohmann::detail::parser<nlohmann::basic_json<> >::parse_event_t, nlohmann::basic_json<>&)>]'
/usr/include/nlohmann/json.hpp:22700:42:   required from here
/usr/include/c++/10.1.0/bits/stl_uninitialized.h:137:72: error: 'value' is not a member of 'std::is_constructible<nlohmann::basic_json<>, const nlohmann::basic_json<std::map, std::vector, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, bool, long int, long unsigned int, double, std::allocator, nlohmann::adl_serializer>&>'
  137 |       static_assert(is_constructible<_ValueType2, decltype(*__first)>::value,
      |                                                                        ^~~~~
make[2]: *** [CMakeFiles/nheko.dir/build.make:594: CMakeFiles/nheko.dir/src/dialogs/FallbackAuth.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:168: CMakeFiles/nheko.dir/all] Error 2

[deepbluev7]

This is an issue with nlohmann/json. You need to use either the unreleased 3.8.0 of nlohmann/json or apply the following patch: nlohmann/json#2034

Alternatively you can use an older compiler than gcc10 or use clang. I think I fixed all incompatibilities in our code already.