1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/cp/class.c b/gcc/cp/class.c
index 938d522..dc2c509 100644
--- a/gcc/cp/class.c
+++ b/gcc/cp/class.c
@@ -1268,6 +1268,10 @@ check_bases (tree t,
 
       gcc_assert (COMPLETE_TYPE_P (basetype));
 
+      if (CLASSTYPE_FINAL (basetype))
+        error ("cannot derive from %<final%> base %qT in derived type %qT",
+               basetype, t);
+
       /* If any base class is non-literal, so is the derived class.  */
       if (!CLASSTYPE_LITERAL_P (basetype))
         CLASSTYPE_LITERAL_P (t) = false;