https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109859
康桓瑋 <hewillk at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hewillk at gmail dot com --- Comment #1 from 康桓瑋 <hewillk at gmail dot com> --- Reduced: template<class> concept C = true; template <class = C> int f(); https://godbolt.org/z/59739vMbj