[Bug c++/92032] DR 1601 - Promotion of enumeration with fixed underlying type

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92032

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
We give f(int) cr_promotion:

 1487       /* Give this a better rank if it's a promotion.  */
 1488       if (same_type_p (to, type_promotes_to (from))
 1489           && next_conversion (conv)->rank <= cr_promotion)
 1490         conv->rank = cr_promotion;

while f(char) has cr_std, which is worse than cr_promotion, so we pick f(int).