[C++11/14] std::cout guaranteed to be initialized?

Is std::cout guaranteed to be initialized?

init_priority

#include <iostream>
using namespace std;


struct IBase
{
    IBase()
    {
        cout << "IBase Default Constructor" << endl;
    }

    virtual const char* printMe() const = 0;

private:
    std::ios_base::Init mInitializer_;
};


struct Derived final : IBase
{
    virtual const char* printMe() const
    {
        return "Print me if you like~";
    }

    friend ostream & operator<<(
        ostream &os,
        const Derived& p)
    {
        return os << p.printMe();
    }
};


template<typename T>
T CrashMeIfYouCan = T{};

int main()
{
    cout << CrashMeIfYouCan<Derived> << endl;
}