On Fri, Dec 2, 2011 at 10:29 AM, Nicolas Cellier < nicolas.cellier.aka.n...@gmail.com> wrote:
> 2011/12/2 Marcus Denker <marcus.den...@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. > +1 > > Nicolas > > > On Fri, Dec 2, 2011 at 9:08 AM, Stéphane Ducasse > > <stephane.duca...@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 <ljw1...@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 <ljw1...@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 < > bsch...@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-boun...@lists.gforge.inria.fr > >>>>>>>> [pharo-project-boun...@lists.gforge.inria.fr] on behalf of Larry > White > >>>>>>>> [ljw1...@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, Stéphane Ducasse > >>>>>>>> <stephane.duca...@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 -- den...@acm.org > > http://www.marcusdenker.de > > > > -- best, Eliot
