2011/12/2 Marcus Denker <marcus.denker@inria.fr>:

> Hi,
>
> We had a look and the problem is that printOn: on Stream is defined to
> print the contents of the Stream even though it might
> not be initialized yet (e.g. when creating a Stream instance with #basicNew).
>
> The simplest solution is to just not print the contents of Streams in #printOn:
>
> http://code.google.com/p/pharo/issues/detail?id=5047
>
> � � � �Stream should not print its contents in printOn:
>
> Reason:
>
> => Debugging leads to change the state of Stream when looking at it
> => Network streams load all content
> => unitialized Streams has undefined behavior for printing
>
> Solution: remove #printOn:
>

No, no, no I don't agree, you are hiding the main problem, not solving it.
The main problem is not this error, the main problem is that the
debugger does not appear when it should.

Nicolas

> On Fri, Dec 2, 2011 at 9:08 AM, St�phane Ducasse
> <stephane.ducasse@inria.fr> wrote:
>>>>>
>>>>> I only had a look in Pharo 1.4
>>>>> It sounds like a subtle bug related to introduction of
>>>>> SubclassResponsibility in Pharo.
>>>>> If you revert Object>>subclassResponsibility to its previous version
>>>>> you get a more reliable error.
>>>>
>>>> What would be your hypothesis? Because I'm stuck.
>>>> error: is also signaling an exception
>>>>
>>>> error: aString
>>>> � � � �"Throw a generic Error exception."
>>>>
>>>> � � � �^Error new signal: aString
>>>>
>>>> So I wonder why one is more robust.
>>>>
>>>
>>> I'm stuck too, and the Debugger is currently unusable in Pharo 1.4 (I
>>> just can't step over�)
>>
>> Strange. Because I use it.
>> Do you have a scenario that we can focus on to fix the problem you see.
>>
>>
>>> I give up. I only had time for an easy task...
>>>
>>> Nicolas
>>>
>>>>
>>>>
>>>>>
>>>>> Nicolas
>>>>>
>>>>> 2011/12/1 Larry White <ljw1001@gmail.com>:
>>>>>> I was able to replicate with a clean version of the Seaside 3.0.6 One Click
>>>>>> download by executing Stream #basicNew in a workspace. �It did work a couple
>>>>>> times ok using "do it" from the menu, but seems to lock pretty regularly
>>>>>> using print or explore keyboard shortcuts.
>>>>>>
>>>>>> thanks.
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Thu, Dec 1, 2011 at 1:33 PM, Larry White <ljw1001@gmail.com> wrote:
>>>>>>>
>>>>>>> I can do it with control-P (print) in the Workspace. �I just did it with a
>>>>>>> single try, though sometimes it takes more than one. �Speed isn't an issue,
>>>>>>> I can wait 10 minutes and see it happen sometimes..
>>>>>>>
>>>>>>> I have to take a break now, but when I get a few minutes, I'll try again
>>>>>>> with a fresh install of the latest Seaside one-click for the mac.
>>>>>>>
>>>>>>> thanks.
>>>>>>>
>>>>>>> On Thu, Dec 1, 2011 at 1:20 PM, Schwab,Wilhelm K <bschwab@anest.ufl.edu>
>>>>>>> wrote:
>>>>>>>>
>>>>>>>> I just tried to hang 1.1.1 (using a traditional linux vm) and a 1.4 image
>>>>>>>> with a Cog vm (also linux). �No problems, but I do have questions that might
>>>>>>>> be important to others trying to reproduce it:
>>>>>>>>
>>>>>>>> (1) how fast do you do this?
>>>>>>>> (2) do you inspect the instances, or just let them get gc'd immediately?
>>>>>>>>
>>>>>>>> Bill
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> ________________________________
>>>>>>>> From: pharo-project-bounces@lists.gforge.inria.fr
>>>>>>>> [pharo-project-bounces@lists.gforge.inria.fr] on behalf of Larry White
>>>>>>>> [ljw1001@gmail.com]
>>>>>>>> Sent: Thursday, December 01, 2011 12:56 PM
>>>>>>>> To: Pharo-project@lists.gforge.inria.fr
>>>>>>>> Subject: Re: [Pharo-project] VM freezes sending #basicNew to Stream
>>>>>>>> subclass
>>>>>>>>
>>>>>>>> I can do it with
>>>>>>>>
>>>>>>>> Stream basicNew.
>>>>>>>>
>>>>>>>> but I have to invoke it twice. The first time it works ok.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Thu, Dec 1, 2011 at 12:48 PM, St�phane Ducasse
>>>>>>>> <stephane.ducasse@inria.fr> wrote:
>>>>>>>>>
>>>>>>>>> gary
>>>>>>>>>
>>>>>>>>> can you post the smallest code that makes the system hangs?
>>>>>>>>>
>>>>>>>>> Stef
>>>>>>>>>
>>>>>>>>> On Dec 1, 2011, at 4:48 PM, Larry White wrote:
>>>>>>>>>
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> Throwing this out there because it may be a bug.
>>>>>>>>>>
>>>>>>>>>> I'm running the Seaside one-click install on OS X Lion.
>>>>>>>>>> Pharo1.3
>>>>>>>>>> Latest update: #13302
>>>>>>>>>>
>>>>>>>>>> I can reliably cause my VM to freeze up and need to Force-Quit it from
>>>>>>>>>> the OS.
>>>>>>>>>>
>>>>>>>>>> I'm implementing (copying) the probability logic from the blue book.
>>>>>>>>>> When I tried to create an instance of the Binomial class, the system hung. I
>>>>>>>>>> can replicate the problem by sending the message #basicNew to
>>>>>>>>>> ProbabilityDistribution. ProbabilityDistribution is a direct subclass of
>>>>>>>>>> Stream and I haven't overridden or modified #basicNew.
>>>>>>>>>>
>>>>>>>>>> What's happening is that it fails in the BlockClosure [anObject doit],
>>>>>>>>>> but only when I instantiate a member of this particular class hierarchy. In
>>>>>>>>>> the probability classes, a #doIt in a Workspace hits the line "self suspend"
>>>>>>>>>> in the #terminate method of Process and the VM hangs there.
>>>>>>>>>>
>>>>>>>>>> I believe they had ProbabilityDistribution subclass from Stream
>>>>>>>>>> because sampling from a distribution is like reading from a Stream, but I
>>>>>>>>>> don't think any there's any actual shared code, so I switched the superclass
>>>>>>>>>> of ProbabilityDistribution to Object and the code works fine now.
>>>>>>>>>>
>>>>>>>>>> Thanks.
>>>>>>>>>>
>>>>>>>>>> Larry
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>
>>
>>
>
>
>
> --
> --
> Marcus Denker� --� denker@acm.org
> http://www.marcusdenker.de
>