https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97174
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to fail| |10.2.1, 7.5.0
Keywords| |accepts-invalid
Last reconfirmed| |2020-09-23
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. clang rejects it with
t.C:10:9: error: out-of-line definition of 'conv' does not match any
declaration in namespace 'N'
long N::conv (T val)
^~~~