https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68012
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |jason at gcc dot gnu.org
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
This seems like an ill-formed, no diagnostic required situation because no
valid specialization can be generated; if you try to instantiate the template,
G++ complains then. I agree that giving a diagnostic would be better, but the
conformance issue is that G++ allows you to redefine it (PR 92576).
