Another idiom I wish were gone from phobos/druntime

[Chris via Digitalmars-d]

On Friday, 6 February 2015 at 14:29:16 UTC, ketmar wrote:
> On Fri, 06 Feb 2015 14:04:39 +0000, Chris wrote:
>
>> auto opSlice(size_t low, size_t high)
> ...
>> 
>> contract {
>>    opSlice(size_t low, size_t high) {
>
> dead before the start.

Why? Would you mind to elaborate on that a little? ;)