https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115775
--- Comment #4 from Sean Murthy <s.murthy at outlook dot com> --- (In reply to Xi Ruoyao from comment #2) > Clang says: > > <source>:35:10: error: deduction guide template contains a template > parameter that cannot be deduced ... > but I'm not sure if this is correct (or more correct than GCC). The little that I know about clang, it is somewhat behind on alias templates in this area. To me, it is unclear if that error is genuinely pointing to non-conforming code, but if that error is correctly rejecting invalid code, then it points to an "accepts-invalid" bug in GCC.
