Should std::current_exception return non-null from catch block in a class's destructor

My coworkers and I think we have found a bug in Visual C++ 2012 and 2013 but we aren't sure. Should the call to std::current_exception in the following code be expected to return a non-null exception_ptr? It seems to on most other compilers we've tried:

#include <exception>
#include <stdexcept>
#include <iostream>

class A
{
public:

    ~A()
    {
        try
        {
            throw std::runtime_error("oh no"); 
        }

        catch (std::exception &)
        {
            std::clog << (bool)std::current_exception() << std::endl;
        }
    }
};

void foo ()
{
    A aa;
    throw std::runtime_error("oh no");
}

int main(int argc, char **)
{
    try
    {
        foo();
    }
    catch(...)
    {
    }
    return 0;
}

When run under Visual C++ we get "0" (false, which means the exception_ptr returned is null). Other compilers, such as g++, print "1".