From: Andy Gimblett <A.M.Gimblett@...>
Date: 2006-04-21T17:21:36+09:00
Subject: Threading example in FAQ 4.2 is slightly broken?

Hi all,

I just ran the example at the end of FAQ 4.2

    http://www.rubycentral.com/faq/rubyfaq-4.html#ss4.2

The FAQ text says this produces:

> onetwo: : 00
> 
> onetwo: : 11
> 
> onetwo: : 33

This confused me, so I ran the code and got:

> one: 0
> two: 0
> one: 1
> two: 1
> one: 3
> two: 3

which made more sense.  OK, so thread scheduling is nondetermininistic
and there's no mutual exclusion on stdout, so I can see how the output
given in the FAQ entry _could_ happen - however, I think the version I
saw demonstrates the FAQ's point more clearly.

Who should I tell about this?  Raise a bug?  Or is raising the alarm
hereabouts sufficient?  :-)

Thanks,

-Andy

-- 
Andy Gimblett
Computer Science Department
University of Wales Swansea
http://www.cs.swan.ac.uk/~csandy/