https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79751
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|wrong-code |accepts-invalid
Target Milestone|--- |10.0
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
<source>:6:10: error: a concept cannot be constrained
6 | concept AnotherConcept = true;
| ^~~~~~~~~~~~~~
Fixed in GCC 10+
