https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83808
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- gcc/cp/tree.c.jj 2018-01-17 11:54:08.669802704 +0100
+++ gcc/cp/tree.c 2018-01-17 13:11:08.524278851 +0100
@@ -1044,11 +1044,14 @@ array_of_runtime_bound_p (tree t)
if (!t || TREE_CODE (t) != ARRAY_TYPE)
return false;
tree dom = TYPE_DOMAIN (t);
- if (!dom)
- return false;
- tree max = TYPE_MAX_VALUE (dom);
- return (!potential_rvalue_constant_expression (max)
- || (!value_dependent_expression_p (max) && !TREE_CONSTANT (max)));
+ if (dom)
+ {
+ tree max = TYPE_MAX_VALUE (dom);
+ if (!potential_rvalue_constant_expression (max)
+ || (!value_dependent_expression_p (max) && !TREE_CONSTANT (max)))
+ return true;
+ }
+ return array_of_runtime_bound_p (TREE_TYPE (t));
}
/* Return a reference type node referring to TO_TYPE. If RVAL is
isn't sufficient either though.
