bryce at kampjes.demon.co.uk wrote:
> My next attempt at formulating a version of the same bug that'll
> run in a vanilla 3.10 image is:
> 
>    100 timesRepeat:
> 	[processes := (1 to: 10) collect: [:each| [[(MessageTally new spyEvery: 1 on: [(Delay forMilliseconds: 500) wait]) ] repeat] fork ].
> 	(Delay forSeconds: 1) wait.
> 	processes do: [:each| each terminate].]

Running MessageTallies concurrently is a big, big no-no. Check out class 
MessageTally and in particular its (shared) class variables 
ObservedProcess and Timer.

Cheers,
   - Andreas