message: Disable thread_local on GCC/macOS
  See
diff: # define CAF_ANNOTATE_FALLTHROUGH static_cast<void>(0)
  # define CAF_COMPILER_VERSION \
  (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
  + // disable thread_local on GCC/macOS due to heap-use-after-free bug:
  + // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67135
  +# ifdef __APPLE__
  +# define CAF_NO_THREAD_LOCAL
  +# endif
  #elif defined(_MSC_VER)
  # define CAF_MSVC
  # define CAF_DEPRECATED
  