BitField issue

void fun()
{
	union Test1
	{
		struct
		{
			u32 foo : 2;
			u32 bar : 2;
		};

		u32 packed;
	};

	Test1 a, b;

	a.foo = 0; a.bar = 1;
	b.foo = 2; b.bar = 3;

	a.bar = b.bar; // only 'bar' bits are copied
	assert(a.foo == 0); // works as expected

	union Test2
	{
		BitField<0, 2, u32> foo;
		BitField<2, 2, u32> bar;

		u32 packed;
	};

	Test2 c, d;

	c.foo = 0; c.bar = 1;
	d.foo = 2; d.bar = 3;

	c.bar = d.bar; // entire 'c' is overwritten by 'd' because bitfield types match and custom operator is not called
	assert(c.foo == 0); // oops
}