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From: "johelegp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/106289] New: Value of polymorphic type as template argument
Date: Wed, 13 Jul 2022 23:16:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106289

            Bug ID: 106289
           Summary: Value of polymorphic type as template argument
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: johelegp at gmail dot com
                CC: johelegp at gmail dot com
  Target Milestone: ---

See https://godbolt.org/z/4jGn1fsc8.

```C++
struct B {
  virtual ~B() =3D default;
};

template<auto> long y;
long z =3D y<B{}>;
```

```
<source>:6:10: error: '((& B::_ZTV1B) + 16)' is not a valid template argume=
nt
for 'int (**)(...)' because it is not the address of a variable
    6 | long z =3D y<B{}>;
      |          ^~~~~~
Compiler returned: 1
```=