"g++-12"   -fvisibility-inlines-hidden -std=c++17 -fPIC -m64 -pthread -O0 -fno-inline -Wall -fvisibility=hidden  -DBOOST_ALL_NO_LIB=1 -DBOOST_COBALT_USE_STD_PMR=1   -I".." -I"../libs/hana/test/_include" -I"/var/boost/run/boost_root/libs/assert/include" -I"/var/boost/run/boost_root/libs/core/include" -I"/var/boost/run/boost_root/libs/hana/include" -I"/var/boost/run/boost_root/libs/throw_exception/include" -I"/var/boost/run/boost_root/libs/tuple/include"  -c -o "/var/boost/run/results/boost/bin.v2/libs/hana/test/test~pair~tag_of.test/gcc-12~c++17/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/pair/tag_of.o" "../libs/hana/test/pair/tag_of.cpp"

In file included from ../libs/hana/test/pair/tag_of.cpp:5:
../boost/hana/core/tag_of.hpp: In instantiation of 'struct boost::hana::tag_of<std::integral_constant<long unsigned int, 0> >':
../libs/hana/test/pair/tag_of.cpp:27:75:   required from here
../boost/hana/core/tag_of.hpp:24:12: error: ambiguous template instantiation for 'struct boost::hana::tag_of<std::integral_constant<long unsigned int, 0>, boost::hana::when<true> >'
   24 |     struct tag_of : tag_of<T, when<true>> { };
      |            ^~~~~~
../boost/hana/core/tag_of.hpp:33:12: note: candidates are: 'template<class T, bool condition> struct boost::hana::tag_of<T, boost::hana::when<condition> > [with T = std::integral_constant<long unsigned int, 0>; bool condition = true]'
   33 |     struct tag_of<T, when<condition>> {
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../libs/hana/test/pair/tag_of.cpp:6:
../boost/hana/ext/std/integral_constant.hpp:68:12: note:                 'template<class T> struct boost::hana::tag_of<T, boost::hana::when<(boost::hana::detail::is_std_integral_constant((T*)(0)) && (! boost::hana::detail::is_hana_integral_constant((T*)(0))))> > [with T = std::integral_constant<long unsigned int, 0>]'
   68 |     struct tag_of<T, when<
      |            ^~~~~~~~~~~~~~~
   69 |         detail::is_std_integral_constant((T*)0) &&
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   70 |         !detail::is_hana_integral_constant((T*)0)
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   71 |     >> {
      |     ~~      
../boost/hana/core/tag_of.hpp:24:12: error: invalid use of incomplete type 'struct boost::hana::tag_of<std::integral_constant<long unsigned int, 0>, boost::hana::when<true> >'
   24 |     struct tag_of : tag_of<T, when<true>> { };
      |            ^~~~~~
../boost/hana/core/tag_of.hpp:24:12: note: declaration of 'struct boost::hana::tag_of<std::integral_constant<long unsigned int, 0>, boost::hana::when<true> >'
../libs/hana/test/pair/tag_of.cpp: In function 'int main()':
../libs/hana/test/pair/tag_of.cpp:27:77: error: 'type' in 'struct boost::hana::tag_of<std::integral_constant<long unsigned int, 0> >' does not name a type
   27 |         using Tag = hana::tag_of<std::integral_constant<unsigned long, 0>>::type;
      |                                                                             ^~~~
../libs/hana/test/pair/tag_of.cpp:34:77: error: 'type' in 'struct boost::hana::tag_of<std::integral_constant<long unsigned int, 0> >' does not name a type
   34 |         using Tag = hana::tag_of<std::integral_constant<unsigned long, 0>>::type;
      |                                                                             ^~~~