"clang++-18"   -fvisibility-inlines-hidden -Wno-c99-extensions -std=c++2b -fPIC -pthread -O0 -fno-inline -Wall -fvisibility=hidden -m64 --target=x86_64-pc-linux  -DBOOST_ALL_NO_LIB=1 -DBOOST_COBALT_USE_STD_PMR=1   -I".."  -c -o "/var/boost/run/results/boost/bin.v2/libs/vmd/test/test_is_empty_fail.test/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/test_is_empty_fail.o" "../libs/vmd/test/test_is_empty_fail.cpp"

In file included from ../libs/vmd/test/test_is_empty_fail.cpp:7:
../libs/vmd/test/test_is_empty_fail.cxx:24:41: error: 'BOOST_VMD_IS_EMPTY_ERROR' declared as an array with a negative size
   24 |   typedef char BOOST_VMD_IS_EMPTY_ERROR[-1];
      |                                         ^~
1 error generated.
(failed-as-expected) /var/boost/run/results/boost/bin.v2/libs/vmd/test/test_is_empty_fail.test/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/test_is_empty_fail.o

    echo failed as expected > "/var/boost/run/results/boost/bin.v2/libs/vmd/test/test_is_empty_fail.test/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/test_is_empty_fail.o"