[Bug c++/109576] access checking done on constexpr even if the access was done in the class itself when used inside a template

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109576

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.7.1, 5.1.0

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Another testcase:
```
struct static_string {
        constexpr operator const char*() const { return &chars_; }
        constexpr static_string() : chars_(0) {}
private:
        char chars_ ;//= '\0';
};

constexpr static_string enum_name_v{};

template<int V>
struct s{
        static constexpr const char* local_name = enum_name_v;
};
auto t = s<0>::local_name;
```
Note the above fails in GCC 4.6.1 differently:
<source>:12:51: error: '(const char*){'\000'}' is not a constant expression