https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83426
Patrick Palka <ppalka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords|needs-bisection | CC| |ppalka at gcc dot gnu.org --- Comment #6 from Patrick Palka <ppalka at gcc dot gnu.org> --- Although we accept such partial specializations ever since r12-1093, the implicit conversion seems to mess with deduction, and the partial specialization ends up being effectively unusable much like PR60679: template<char C1, char C2> struct X; template<int C1> struct X<C1, 5> { }; X<5, 5> x; // error: aggregate ‘X<'\005', '\005'> x’ has incomplete type and cannot be defined