This code crashes dmd:

struct Foo
{
	int[int] foo;
}

struct Bar
{
	Foo xxx;

	template opDispatch(string name)
	{
		@property auto ref opDispatch(this X, V)(auto ref V v) { return mixin("xxx."~name~" = v"); }
	}
}

void main()
{
	Bar bar;
	
	bar.foo[0] = 0;
}