Intended Security Hole?

[Chris Cain]

On Wednesday, 24 October 2012 at 16:59:11 UTC, Manfred Nowak 
wrote:
> From the docs, i.e. function.html:
>
>> Functions without bodies [...] enable implementation to be
>> completely hidden from the user of it.
>
> This means also, that the implementation can be changed during 
> runtime
> by "overriding" with another implementation, which might be 
> malicious.
>
> Why is it a good thing to rely on the reputability of an 
> unknwon coder?
>
> -manfred
> 

Missing part of your quote that clarifies your post:
> and that implementation will be provided at the link step.

So, no, the implementation wouldn't be changed during runtime 
since it must be provided when linking.