[Bug c++/126825] std::initializer_list is causing an instantiation constructor of pointer type for an array types too

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126825

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2026-08-13
            Summary|Array decays to pointer     |std::initializer_list is
                   |when constructing element   |causing an instantiation
                   |of std::initializer_list    |constructor of pointer type
                   |                            |for an array types too
             Status|UNCONFIRMED                 |NEW
           Keywords|wrong-code                  |

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
So this is a bit odd. Because in the end only A::A<char const [1]> is called.
So seems not to have any wrong code here happening here. Just instantiation of
a constructor that is not used later on.

Note this happens with all array types not just with string constants as shown
by:
```
#include <initializer_list>
#include <type_traits>

template <class T>struct s;
template <class T, int n>
struct s<T[n]>
{
  s();
  //static_assert(std::is_same_v<T, const int>);
};

struct A {
        template<typename T>
        A(T& arg) {
          static s<T> b={};
        }
};
std::initializer_list<A> b { (const int[]){1,2,3}, (const int[]){4} };
```