{
        Deleter d1{&counter};
        unique_ptr<int, Deleter> p1(&data, std::move(d1));
        unique_ptr<int, Deleter> p2 = std::move(p1);
        CHECK(counter == 1);

        Deleter d3{&counter};
        [[maybe_unused]] unique_ptr<int, Deleter> p3(&data, std::move(d3));
        CHECK(counter == 1);

        // [[maybe_unused]] is not supported by cppcheck 1.90.
        // See https://github.com/danmar/cppcheck/pull/2570
        // cppcheck-suppress unreadVariable
        p3 = std::move(p2);
        CHECK(counter == 2); //тут падает
    }
    CHECK(counter == 3);
}