[Bug c++/111776] ICE on delete expression with multiple viable destroying operator delete

[leni536 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111776

--- Comment #2 from Lénárd Szolnoki <leni536 at gmail dot com> ---
Same ICE without destroying delete:

```
struct A {
    void operator delete(void *);
};

struct B {
    void operator delete(void *);
};

struct C : A, B {
    using A::operator delete;
    using B::operator delete;
};

void f(C* ptr) {
    delete ptr;
}
```

This goes back to GCC 7.

GCC 6 accepts it and calls `A::operator delete`, which is not much better.

https://godbolt.org/z/cczfdKoqb