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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/55409] std::list not properly wrapping access to custom allocator through allocator_traits
Date: Fri, 10 Apr 2015 14:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55409

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Minimal test:

#include <list>

template<typename T> class my_alloc
{
public:
    typedef T value_type;

    T* allocate(size_t n)
    { return std::allocator<T>::allocate(n); }

    void deallocate(T* ptr, size_t n)
    { std::allocator<T>::deallocate(ptr, n); }

    my_alloc() = default;
    template<typename U> my_alloc(const my_alloc<U>&) noexcept {}
};

template<typename T>
bool operator==(const my_alloc<T>&, const my_alloc<T>&) { return true; }

template<typename T>
bool operator!=(const my_alloc<T>&, const my_alloc<T>&) { return false; }

int main()
{
    typedef std::list<int, my_alloc<int>> container_type;
    container_type cont;
    cont.push_back(11);
}