Allow identical imports

[Daniel Murphy]

"Dicebot" <public at dicebot.lv> wrote in message 
news:ghodlivqehfqkvxsisgf at forum.dlang.org...
> On Tuesday, 30 July 2013 at 14:52:52 UTC, Tofu Ninja wrote:
>> I would think that a redundant import would be something along the lines 
>> of a warning, not a full on error, there is no reason the compiler 
>> shouldn't be able to compile it.
>
> That is somewhat similar to "statement has no effect" error. Any warning 
> that has no valid use case should be an error, it does not matter if 
> compiler can do it.

The use case is generated code.  Errors are for things that can cause bugs. 
How can identical imports cause a bug?