[Bug c++/110513] Invalid use of incomplete type std::bool_constant inside requires expression

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110513

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-07-01
     Ever confirmed|0                           |1
           Keywords|                            |rejects-valid

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase:
```
template<bool a>
struct bool_const1 
{
  typedef bool T;
  static constexpr T value = a;
  constexpr T operator()(){return value;}
};

struct B {
    bool b = true;
};

// ok everywhere
static_assert( bool_const1<B{}.b>{}() );

// error in GCC
static_assert( requires() { bool_const1<B{}.b>{}(); } );
```