From: Tanaka Akira <akr@...>
Date: 2010-04-07T15:41:36+09:00
Subject: [ruby-core:29292] Re: [Bug #3104] Random: seeding issues

2010/4/7 Marc-Andre Lafortune <redmine@ruby-lang.org>:

> 1) Seeding sometimes ignores the high bit of seed data.
>
>   Random.new((1<<64)-1).rand == Random.new((1 << 65) -1).rand
>    # => true, should be false
>
> Probably some leftover code?

No.

The code is required to specify zero as buf[len-1] for init_by_array.

> 3) Finally, I was wondering if there wasn't a typo trashing some of the bits in the initial states when seeding with an array:

It should be asked to the author of Mersenne Twister at first.
-- 
Tanaka Akira