On 16 October 2010 08:14, John M McIntosh
<johnmci at smalltalkconsulting.com> wrote:
> Igor, take a look back in the messages from January 25th 2010
>        Re: [Pharo-project] new mac menu code
> There may be something related there?
>
>
No, its not related, because i'm not running it on Mac.

It is the bug in my own FIFOQueue implementation, which triggered the
bugs all over the places where following assumed:

queue isEmpty ifFalse: [
  self assert: queue nextOrNil notNil.
]

or

queue peek ifNotNil: [
  self assert: queue nextOrNil notNil.
]

neither #peek not #isEmpty does not guarantees that at next send , a
queue will contain any items.
Its actually completely pointless to do such checks.

One should use #next , for blocking version , which blocks the caller
if there's no items in queue,
or use nextOrNil, for quick non-blocking attempt to fetch item from queue.


-- 
Best regards,
Igor Stasenko AKA sig.