1 files changed, 1 insertions, 0 deletions
diff --git a/sql/procedure.h b/sql/procedure.h
index b7a878344d1..be631675d5c 100644
--- a/sql/procedure.h
+++ b/sql/procedure.h
@@ -55,6 +55,7 @@ public:
   unsigned int size_of() { return sizeof(*this);}
   bool check_vcol_func_processor(void *arg)
   {
+    DBUG_ASSERT(0); // impossible
     return mark_unsupported_function("proc", arg, VCOL_IMPOSSIBLE);
   }
 };