[Bug c++/94885] [10 Regression] Functional cast from int to empty class type with empty base incorrectly accepted with -std=c++2a

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94885

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
process_init_constructor_record:
1743       if (DECL_SIZE (field) && integer_zerop (DECL_SIZE (field))
1744           && !TREE_SIDE_EFFECTS (next))
1745         /* Don't add trivial initialization of an empty base/field to the
1746            constructor, as they might not be ordered the way the back-end
1747            expects.  */
1748         continue;
but here the initializer was erroneous so skipping it made us accept invalid
code.  Patch incoming.