std.array.array broken?

[Stanislav Blinov]

On Sunday, 2 February 2014 at 01:03:25 UTC, Andrei Alexandrescu 
wrote:

>> I would have had it my way, I would introduce:
>>
>> byLine -> safe, doesn't reuse a buffer
>> byLineBuffer -> reuses a buffer
>
> No. Too much breakage.

How exactly is it breakage? The user code:

- will not stop to compile
- will not stop to link
- will still produce expected results

The only thing that can "break" is that the user code will lose 
performance where it actually does make an explicit copy. This 
can be solved by introducing a message with pragma(msg), 
directing users to get rid of unnecessary copying. The message 
could stick around for several releases.