https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63715
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> gccbug.cc:15:43: error: reinterpret_cast from integer to pointer
> But the result of the expression is well-defined in compile time...
> Moreover, gcc-4.8.3 compiles this code just fine.
Yes it might be well-defined outside of a constexpr but it is not allowed
inside a constexpr as mentioned by the C++ standard. Basically 4.8.x did not
implement all constraints on constexpr and 4.9 does.