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From: "ldalessandro at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/97328] New: [ICE] internal compiler error: in
 verify_ctor_sanity, at cp/constexpr.c:3995
Date: Wed, 07 Oct 2020 23:36:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97328

            Bug ID: 97328
           Summary: [ICE] internal compiler error: in verify_ctor_sanity,
                    at cp/constexpr.c:3995
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ldalessandro at gmail dot com
  Target Milestone: ---

Following code causes ICE, but *ONLY* when explicitly passing `-std=3Dc++20=
`.

```
template <typename T, int N>
struct vector {
    union storage {=20
        T t;=20
        constexpr  storage() {}
    } data[N];
};

constexpr auto foo() {
    vector<char, 8> i;
    return i;
}
auto f =3D foo();
```

See https://godbolt.org/z/hYYeq8.=