[Bug c++/95724] bogue error : "expected '{' before ')' token"

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95724

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note the testcase does not ICE so ice-on-invalid is wrong.  It's really
a diagnostic only.  If we want sth extra to distinguish error diagnostics
from warning diagnostics then we should add one (can't come up with a good name
right now)