Only invert bits up to the maximum possible in ~CacheUpdateFlags

diff --git a/include/deal.II/grid/grid_tools_cache_update_flags.h b/include/deal.II/grid/grid_tools_cache_update_flags.h
index dbac866d3ccc0b71429306acf152ca8b017e5402..7ecf04a24260707de15e484ea99cac961ca4d656 100644 (file)
--- a/include/deal.II/grid/grid_tools_cache_update_flags.h
+++ b/include/deal.II/grid/grid_tools_cache_update_flags.h
@@ -121,8 +121,8 @@ namespace GridTools
   operator ~ (const CacheUpdateFlags f1)
   {
     return static_cast<CacheUpdateFlags> (
-             ~static_cast<unsigned int> (f1)
-           );
+             static_cast<unsigned int> (f1) ^
+             static_cast<unsigned int> (update_all));
   }