* installing *source* package ‘lmSubsets’ ...
** this is package ‘lmSubsets’ version ‘0.5-2’
** package ‘lmSubsets’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
using C++ compiler: ‘clang version 21.1.6’
using C++11
make[1]: Entering directory '/data/gannet/ripley/R/packages/tests-clang/lmSubsets/src'
/usr/local/clang21/bin/clang++ -std=gnu++17 -I"/data/gannet/ripley/R/R-clang/include" -DNDEBUG -Iinclude  -isystem /usr/local/clang21/include -I/usr/local/clang/include    -fpic  -O3 -Wall -pedantic -frtti -Wp,-D_FORTIFY_SOURCE=3 -Wno-missing-template-arg-list-after-template-kw   -c lmSubsets.cc -o lmSubsets.o
In file included from lmSubsets.cc:45:
In file included from include/mcs/subset/abba.hh:40:
In file included from include/mcs/subset/detail/dca_preo.hh:30:
In file included from include/mcs/subset/detail/dca_node.hh:42:
include/mcs/subset/detail/dca_subset.hh:55:19: warning: unused variable 'n' [-Wunused-variable]
   55 |         const int n = subset.size();
      |                   ^
In file included from lmSubsets.cc:45:
In file included from include/mcs/subset/abba.hh:40:
In file included from include/mcs/subset/detail/dca_preo.hh:32:
include/mcs/subset/detail/dca_state.hh:102:19: warning: unused variable 'n' [-Wunused-variable]
  102 |         const int n = root_size_;
      |                   ^
In file included from lmSubsets.cc:45:
In file included from include/mcs/subset/abba.hh:40:
In file included from include/mcs/subset/detail/dca_preo.hh:32:
In file included from include/mcs/subset/detail/dca_state.hh:40:
In file included from include/mcs/util/function_traits.hh:26:
include/mcs/util/detail/function_traits.hh:53:59: error: type 'double (aic<double>::*)(int, double) const noexcept' cannot be used prior to '::' because it has no members
   53 | struct function_traits : public function_traits<decltype(&T::operator())>
      |                                                           ^
include/mcs/util/detail/function_traits.hh:53:33: note: in instantiation of template class 'mcs::util::detail::function_traits<double (aic<double>::*)(int, double) const noexcept>' requested here
   53 | struct function_traits : public function_traits<decltype(&T::operator())>
      |                                 ^
include/mcs/subset/detail/dca_state.hh:354:22: note: in instantiation of template class 'mcs::util::detail::function_traits<const mcs::subset::detail::aic<double>>' requested here
  354 |             typename cost_func_traits::signature,
      |                      ^
include/mcs/subset/subset.hh:67:15: note: in instantiation of template class 'mcs::subset::detail::dca_state_best<double, const mcs::subset::detail::aic<double>, mcs::subset::detail::dca_preo::radius<double, mcs::subset::detail::dca_preo::complete<double>>>' requested here
   67 |     dca_state state(ay_mat, mark, cost_func, nbest, preo_radius(prad));
      |               ^
lmSubsets.cc:505:13: note: in instantiation of function template specialization 'mcs::subset::subset_best<double, const mcs::subset::detail::aic<double>>' requested here
  505 |             subset_best<double, decltype(cost_aic)>(
      |             ^
2 warnings and 1 error generated.
make[1]: *** [/data/gannet/ripley/R/R-clang/etc/Makeconf:207: lmSubsets.o] Error 1
make[1]: Target 'all' not remade because of errors.
make[1]: Leaving directory '/data/gannet/ripley/R/packages/tests-clang/lmSubsets/src'
ERROR: compilation failed for package ‘lmSubsets’
* removing ‘/data/gannet/ripley/R/packages/tests-clang/lmSubsets.Rcheck/lmSubsets’