Simple test suite for std.random

[Joseph Rushton Wakeling]

On 07/05/2013 04:16 PM, Joseph Rushton Wakeling wrote:
> To this we can add: http://d.puremagic.com/issues/show_bug.cgi?id=10550
> 
> At least 2 of the Xorshift generators (32 and 160) depart strongly from
> uniformity in their output.
> 
> Because the others appear OK, my guess would be that the fault lies either in
> the initialization of the seeds_ variable inside XorshiftEngine, or (more
> likely) in the parts of popFront related to the 32- and 160-bit engines.

A fix for this landed earlier today, although we probably need to follow up with
some appropriate experts to have the solution rigorously reviewed.

Thanks to Masahiro Nakagawa and monarch_dodra who made sure the fix made it to
Phobos in double quick time :-)