[Bug c++/99493] Address of template parameter object is not a valid template argument

[johelegp at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99493

--- Comment #1 from Johel Ernesto Guerrero Peña <johelegp at gmail dot com> ---
Slightly simplified: https://godbolt.org/z/rv97Gh.
```C++
struct A{};
template<A a>constexpr const A*tpo{&a};
template<const A*>struct B{};
B<tpo<A{}>>b;
```
```
<source>:4:10: error: the address of 'A{}' is not a valid template argument
    4 | B<tpo<A{}>>b;
      |          ^~
Compiler returned: 1
```