[Bug c++/69178] [concepts] An invalid expression in a requires-expression is evaluated too eagerly

[ville.voutilainen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69178

--- Comment #1 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
This check happens in check_bases(), which doesn't take complain flags, so
wherever that check fails, it's always a hard error. I suppose the checking
function call chains that go to that function should accept complain flags
and then decide whether to produce a hard error or not?