Bryce
which version of 3.9?
The latest I created with the fixes of andreas? 3.9.1
or the one before, because I have the impression that the latest 3.9.1  
has the same fixes than
3.10. So may be there is a problem with the fixes I harvested too.
Can you check? I'm travelling right now.

Stef

On Apr 27, 2008, at 9:19 PM, <bryce at kampjes.demon.co.uk> <bryce at kampjes.demon.co.uk 
 > wrote:

> Andreas Raab writes:
>> 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.
>
> Good point, but I can reproduce the bug without using MessageTally
> or any class variables. ExuperyProfiler doesn't use class variables.
>
> The following will reproduce it:
>   TestProfiler>>spyOn: aBlock
> 	| myDelay millisecs timer |
> 	millisecs := 1.
> 	(aBlock isMemberOf: BlockContext) ifFalse:
> 	    [self error: 'spy needs a block here'].
> 	myDelay := Delay forMilliseconds: millisecs.
> 	timer := [[true] whileTrue:
> 					[myDelay wait].
> 			 nil] newProcess.
> 	timer priority: Processor userInterruptPriority.
> 	"activate the probe and evaluate the block"
> 	timer resume.
> 	aBlock ensure: [timer terminate].
> 	^ self
>
>  100 timesRepeat:
> 	[processes := (1 to: 10) collect: [:each| [[(TestProfiler new  
> spyOn: [(Delay forMilliseconds: 500) wait]) ] repeat] fork ].
> 	(Delay forSeconds: 1) wait.
> 	processes do: [:each| each terminate]]
>
> TestProfiler is a new subclass of Object without any variables or
> any other methods.
>
> I'm not convinced this is a new bug with 3.10. It feels similar to
> something I've encountered earlier. It is happening frequently in
> 3.10 but not in 3.9.
>
> Bryce
>
>