https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84044
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
> Thread model: posix
> gcc version 9.0.0 20181110 (experimental) [trunk revision 266003] (Debian
> 20181110-2)
>
> Regards,
> Arnaud Giersch
The warning appeared again on trunk in r265875
Author: hubicka
* ipa-devirt.c (odr_types_equivalent_p): Expect constants
than const decls in TREE_VALUE of enum.
(dump_type_inheritance_graph): Improve duplicate dumping.
(free_enum_values): New.
(build_type_inheritance_graph): Use it.
* tree.c (free_lang_data_in_type): Free TYPE_VALUES of enums
which are not main variants or not ODR types.
(verify_type_variant): Expect variants to have no TYPE_VALUES.
