BTW, you wouldn't kill a process *while* it is trying to execute 
SortedCollection>>add: would you? Because this might get you a nil in 
SuspendedDelays faster than you could say "oops". And I agree with your 
analysis that something must be signaling the mutex twice but I will 
point out that one of the processes was the wx event loop which may very 
well be invoked via unlikely places (if I remember the discussion with 
Rob then he had serious problems getting wx to work asynchronously).

Cheers,
   - Andreas

Cees De Groot wrote:
> Thanks John & Tim, for these suggestions. I'll continue debugging
> tonight (have to work in VisualAge today, work hard, earn money) and
> post as I make progress (or not).
> 
> Regards,
> 
> Cees
> 
> On 2/2/06, John M McIntosh <johnmci at smalltalkconsulting.com> wrote:
> 
>>Well if you recall a couple of weeks back I had a changeset that
>>turns on printing of the stack
>>in message send, so you can see the stack on each message send by
>>process.
>>
>>Mind you'll need to build a VM for this, plus write some code to read
>>the log file and
>>determine how the semaphore signalling is done.
>>
>>Or of course change the VM to note the excessive semaphore signalling
>>and print the stack when it
>>happens, and as Tim points out use the Special objects array to track
>>the semaphore of interest.
>>
>>
>>
>>On 1-Feb-06, at 3:42 PM, Cees De Groot wrote:
>>
>>
>>>On 2/1/06, Cees De Groot <cdegroot at gmail.com> wrote:
>>>
>>>>On IRC, Jecel Assumpção remarks that the Semaphore in both cases is
>>>>'in rest' - excessSignals is 1, where 0 would be expected when the
>>>>critical section is active. And -1 when two critical sections are
>>>>active :-)
>>>
>>>
>>>Any suggestions on how we could proceed?
>>>
>>>Thanks,
>>>
>>>Cees
>>>
>>
>>--
>>========================================================================
>>===
>>John M. McIntosh <johnmci at smalltalkconsulting.com> 1-800-477-2659
>>Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com
>>========================================================================
>>===
>>
>>
>>
> 
> 
>