https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111884
--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot
com> ---
I'm going to guess this was introduced by the char8_t changes ("C:
Implement C2X N2653 char8_t and UTF-8 string literal changes", commit
703837b2cc8ac03c53ac7cc0fb1327055acaebd2).
/* Unlike char, char8_t doesn't alias. */
if (flag_char8_t && t == char8_type_node)
return -1;
is not correct for C, where char8_t is not a distinct type.
