[Bug c++/80635] std::optional and bogus -Wmaybe-uninitialized warning

[dushistov at mail dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80635

--- Comment #20 from Evgeniy Dushistov <dushistov at mail dot ru> ---
Also if add one line to code `printf("test\n");`

```
struct FooDeleter {
  void operator()(FooOpaque *p) {
    printf("test\n");
    Foo_free(p);
  }
};
```

gcc don't report any warning,
and valgrind also can not find any errors.