https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99594
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
t.C: In function 'auto f()':
t.C:3:4: error: operand of fold expression has no unexpanded parameter packs
3 | ([](auto) requires (B) {}, ...);
| ^~~~~~~~~~~~~~~~~~~~~~~~
clang 9 rejects it with
t.C:3:13: error: expected body of lambda expression
([](auto) requires (B) {}, ...);
^
