copying a struct containing a struct

[eskimo]

On Fri, 2012-11-16 at 23:45 +0100, Rob T wrote:
> This should be a compiler error or at the very least issue a 
> warning.
> 
> It seems to me that overridden sub-struct opAssign needs to be 
> chained together, and it's a compiler error if there's a break in 
> the chain, i.e., if a sub-level struct has non-default opAssign, 
> then the parent must have one too, else it's an error.
> 

The default generated should simply call the user specified ones of any
sub struct.

Where can I find this bug? When searching for opAssign I can't find it.
I would like to vote for it.