json: Boost 1.80 build failure with gcc11/gcc12: json/impl/parse.ipp: error: no match for 'operator=' (no such error with 1.79)

:info:build darwin.compile.c++ bin.v2/libs/json/build/darwin-12.2.0/release/threading-multi/visibility-hidden/src.o
:info:build     "/opt/local/bin/g++-mp-12"   -fvisibility-inlines-hidden -Os -std=gnu++11 -D_GLIBCXX_USE_CXX11_ABI=0 -arch ppc  -fPIC -m32 -O3 -Wall -fvisibility=hidden -dynamic -gdwarf-2 -fexceptions -Wno-inline  -DBOOST_ALL_NO_LIB=1 -DBOOST_CONTAINER_DYN_LINK=1 -DBOOST_JSON_DYN_LINK=1 -DBOOST_JSON_SOURCE -DNDEBUG  -I"."  -c -o "bin.v2/libs/json/build/darwin-12.2.0/release/threading-multi/visibility-hidden/src.o" "libs/json/src/src.cpp"
:info:build In file included from ./boost/json/src.hpp:37,
:info:build                  from libs/json/src/src.cpp:10:
:info:build ./boost/json/impl/parse.ipp: In function 'boost::json::value boost::json::parse(string_view, std::error_code&, storage_ptr, const parse_options&)':
:info:build ./boost/json/impl/parse.ipp:46:10: error: no match for 'operator=' (operand types are 'std::error_code' and 'boost::json::error_code' {aka 'boost::system::error_code'})
:info:build    46 |     ec = jec;
:info:build       |          ^~~
:info:build In file included from /opt/local/include/gcc12/c++/bits/ios_base.h:46,
:info:build                  from /opt/local/include/gcc12/c++/ios:42,
:info:build                  from ./boost/core/detail/string_view.hpp:30,
:info:build                  from ./boost/json/string_view.hpp:14,
:info:build                  from ./boost/json/kind.hpp:14,
:info:build                  from ./boost/json/array.hpp:14,
:info:build                  from ./boost/json.hpp:15,
:info:build                  from ./boost/json/src.hpp:27:
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note: candidate: 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum)'
:info:build   225 |       operator=(_ErrorCodeEnum __e) noexcept
:info:build       |       ^~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note:   template argument deduction/substitution failed:
:info:build /opt/local/include/gcc12/c++/system_error: In substitution of 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum) [with _ErrorCodeEnum = boost::system::error_code]':
:info:build ./boost/json/impl/parse.ipp:46:10:   required from here
:info:build /opt/local/include/gcc12/c++/system_error:225:7: error: no type named 'type' in 'struct std::enable_if<false, std::error_code&>'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(const std::error_code&)'
:info:build   196 |   class error_code
:info:build       |         ^~~~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'const std::error_code&'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(std::error_code&&)'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'std::error_code&&'
:info:build In file included from ./boost/json/src.hpp:38:
:info:build ./boost/json/impl/parser.ipp: In member function 'std::size_t boost::json::parser::write_some(const char*, std::size_t, std::error_code&)':
:info:build ./boost/json/impl/parser.ipp:80:10: error: no match for 'operator=' (operand types are 'std::error_code' and 'boost::json::error_code' {aka 'boost::system::error_code'})
:info:build    80 |     ec = jec;
:info:build       |          ^~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note: candidate: 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum)'
:info:build   225 |       operator=(_ErrorCodeEnum __e) noexcept
:info:build       |       ^~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note:   template argument deduction/substitution failed:
:info:build /opt/local/include/gcc12/c++/system_error: In substitution of 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum) [with _ErrorCodeEnum = boost::system::error_code]':
:info:build ./boost/json/impl/parser.ipp:80:10:   required from here
:info:build /opt/local/include/gcc12/c++/system_error:225:7: error: no type named 'type' in 'struct std::enable_if<false, std::error_code&>'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(const std::error_code&)'
:info:build   196 |   class error_code
:info:build       |         ^~~~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'const std::error_code&'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(std::error_code&&)'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'std::error_code&&'
:info:build ./boost/json/impl/parser.ipp: In member function 'std::size_t boost::json::parser::write(const char*, std::size_t, std::error_code&)':
:info:build ./boost/json/impl/parser.ipp:125:10: error: no match for 'operator=' (operand types are 'std::error_code' and 'boost::json::error_code' {aka 'boost::system::error_code'})
:info:build   125 |     ec = jec;
:info:build       |          ^~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note: candidate: 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum)'
:info:build   225 |       operator=(_ErrorCodeEnum __e) noexcept
:info:build       |       ^~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note:   template argument deduction/substitution failed:
:info:build /opt/local/include/gcc12/c++/system_error: In substitution of 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum) [with _ErrorCodeEnum = boost::system::error_code]':
:info:build ./boost/json/impl/parser.ipp:125:10:   required from here
:info:build /opt/local/include/gcc12/c++/system_error:225:7: error: no type named 'type' in 'struct std::enable_if<false, std::error_code&>'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(const std::error_code&)'
:info:build   196 |   class error_code
:info:build       |         ^~~~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'const std::error_code&'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(std::error_code&&)'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'std::error_code&&'
:info:build In file included from ./boost/json/src.hpp:39:
:info:build ./boost/json/impl/pointer.ipp: In member function 'const boost::json::value* boost::json::value::find_pointer(boost::json::string_view, std::error_code&) const':
:info:build ./boost/json/impl/pointer.ipp:328:10: error: no match for 'operator=' (operand types are 'std::error_code' and 'boost::json::error_code' {aka 'boost::system::error_code'})
:info:build   328 |     ec = jec;
:info:build       |          ^~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note: candidate: 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum)'
:info:build   225 |       operator=(_ErrorCodeEnum __e) noexcept
:info:build       |       ^~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note:   template argument deduction/substitution failed:
:info:build /opt/local/include/gcc12/c++/system_error: In substitution of 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum) [with _ErrorCodeEnum = boost::system::error_code]':
:info:build ./boost/json/impl/pointer.ipp:328:10:   required from here
:info:build /opt/local/include/gcc12/c++/system_error:225:7: error: no type named 'type' in 'struct std::enable_if<false, std::error_code&>'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(const std::error_code&)'
:info:build   196 |   class error_code
:info:build       |         ^~~~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'const std::error_code&'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(std::error_code&&)'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'std::error_code&&'
:info:build In file included from ./boost/json/src.hpp:43:
:info:build ./boost/json/impl/stream_parser.ipp: In member function 'std::size_t boost::json::stream_parser::write_some(const char*, std::size_t, std::error_code&)':
:info:build ./boost/json/impl/stream_parser.ipp:78:10: error: no match for 'operator=' (operand types are 'std::error_code' and 'boost::json::error_code' {aka 'boost::system::error_code'})
:info:build    78 |     ec = jec;
:info:build       |          ^~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note: candidate: 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum)'
:info:build   225 |       operator=(_ErrorCodeEnum __e) noexcept
:info:build       |       ^~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note:   template argument deduction/substitution failed:
:info:build /opt/local/include/gcc12/c++/system_error: In substitution of 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum) [with _ErrorCodeEnum = boost::system::error_code]':
:info:build ./boost/json/impl/stream_parser.ipp:78:10:   required from here
:info:build /opt/local/include/gcc12/c++/system_error:225:7: error: no type named 'type' in 'struct std::enable_if<false, std::error_code&>'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(const std::error_code&)'
:info:build   196 |   class error_code
:info:build       |         ^~~~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'const std::error_code&'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(std::error_code&&)'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'std::error_code&&'
:info:build ./boost/json/impl/stream_parser.ipp: In member function 'std::size_t boost::json::stream_parser::write(const char*, std::size_t, std::error_code&)':
:info:build ./boost/json/impl/stream_parser.ipp:123:10: error: no match for 'operator=' (operand types are 'std::error_code' and 'boost::json::error_code' {aka 'boost::system::error_code'})
:info:build   123 |     ec = jec;
:info:build       |          ^~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note: candidate: 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum)'
:info:build   225 |       operator=(_ErrorCodeEnum __e) noexcept
:info:build       |       ^~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note:   template argument deduction/substitution failed:
:info:build /opt/local/include/gcc12/c++/system_error: In substitution of 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum) [with _ErrorCodeEnum = boost::system::error_code]':
:info:build ./boost/json/impl/stream_parser.ipp:123:10:   required from here
:info:build /opt/local/include/gcc12/c++/system_error:225:7: error: no type named 'type' in 'struct std::enable_if<false, std::error_code&>'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(const std::error_code&)'
:info:build   196 |   class error_code
:info:build       |         ^~~~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'const std::error_code&'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(std::error_code&&)'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note:   no known conversion for argument 1 from 'boost::json::error_code' {aka 'boost::system::error_code'} to 'std::error_code&&'
:info:build ./boost/json/impl/stream_parser.ipp: In member function 'void boost::json::stream_parser::finish(std::error_code&)':
:info:build ./boost/json/impl/stream_parser.ipp:166:10: error: no match for 'operator=' (operand types are 'std::error_code' and 'boost::json::error_code' {aka 'boost::system::error_code'})
:info:build   166 |     ec = jec;
:info:build       |          ^~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note: candidate: 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum)'
:info:build   225 |       operator=(_ErrorCodeEnum __e) noexcept
:info:build       |       ^~~~~~~~
:info:build /opt/local/include/gcc12/c++/system_error:225:7: note:   template argument deduction/substitution failed:
:info:build /opt/local/include/gcc12/c++/system_error: In substitution of 'template<class _ErrorCodeEnum> typename std::enable_if<std::is_error_code_enum<_Tp>::value, std::error_code&>::type std::error_code::operator=(_ErrorCodeEnum) [with _ErrorCodeEnum = boost::system::error_code]':
:info:build ./boost/json/impl/stream_parser.ipp:166:10:   required from here
:info:build /opt/local/include/gcc12/c++/system_error:225:7: error: no type named 'type' in 'struct std::enable_if<false, std::error_code&>'
:info:build /opt/local/include/gcc12/c++/system_error:196:9: note: candidate: 'std::error_code& std::error_code::operator=(const std::error_code&)'
:info:build   196 |   class error_code
:info:build       |         ^~~~~~~~~~