Internal Compiler Error on Array Value-Initialization in VC++14 (VS2015)

I'm getting an ICE on Visual Studio 2015 CTP 6. Unfortunately, this is happening in a large project, and I can't post the whole code here, and I have been unable to reproduce the problem on a minimal sample. What I'm hoping to get is help in constructing such a sample (to submit to Microsoft) or possibly illumination regarding what's happening and/or what I'm doing wrong.

This is a mock-up of what I'm doing. (Note that the code I'm presenting here does NOT generate an ICE; I'm merely using this simple example to explain the situation.)

I have a class A which is not copyable (it has a couple of "reference" members) and doesn't have a default constructor. Another class, B holds an array of As (plain C array of A values, no references/pointers) and I'm initializing this array in the constructor of B using uniform initialization syntax. See the sample code below.

struct B;

struct A
{
    int & x;
    B * b;

    A (B * b_, int & x_) : x (x_), b (b_) {}
    A (A const &) = delete;
    A & operator = (A const &) = delete;
};

struct B
{
    A a [3];
    int foo;

    B ()
        : a {{this, foo, bar}, {this, bar, foo}}  // <-- THE CULPRIT!
        , foo (2)
    {}
};

int main ()
{
    B b;
    return 0;
}

I can't use std::array because I need to construct the elements in their final place (can't copy.) I can't use std::vector because I need B to contain the As.

Note that if I don't use an array and use individual variables (e.g. A a0, a1, a2;, which I can do because the array is small and fixed in size) the ICE goes away. But this is not what I want since I'll lose ability to get to them by index, which I need. I can use a union of the loose variables over the array to solve my ICE problem and get indexing (construct using the variables, access using the array,) but I think that would result in "undefined behavior" and seems convoluted.

The obvious differences between the above sample and my actual code (aside from the scale) is that A and B are classes instead of structs, each is declared/defined in its own source/header file pair, and none of the constructors is inline. (I duplicated these and still couldn't reproduce the ICE.)

For my actual project, I've tried cleaning the built files and rebuild, to no avail. Any suggestions, etc.?

P.S. I'm not sure if my title is suitable. Any suggestions on that?!?!