[Pharo-project] We have a HorribleErrorBlockingEverything

Marcus Denker marcus.denker at inria.fr
Mon Jul 16 02:31:52 EDT 2012

On Jul 16, 2012, at 4:29 AM, Sean P. DeNigris wrote:

> Marcus Denker-4 wrote
>> Issue 6376:	[Jenkis] test runs fails due to error loading CISupport
>> 	http://code.google.com/p/pharo/issues/detail?id=6376
>> As we can't run tests, nothing will be integrated other than fixes that
>> fix this.
> Found it!

Very good! And yes, that looks very much like the problem...

For the image itself: As we can't load anything, I will do a pre-build where the problem
happend once and we start with that.
Then we can add the fix to that. (not perfect but good enough)


> Issue 6376:	New ProcessSpecificVariables & Running Processes
> http://code.google.com/p/pharo/issues/detail?id=6376
> It seems that Zinc has exposed a lurking bug with ProcessSpecificVariables.
> From issue 6376...
> If a process is already using a ProcessSpecificVariable, and another is
> added to the system, this new PSV is not added to the env instVar of those
> processes. When access to the new PSV is attempted, a subscript error is
> thrown.
> To reproduce, evaluate:
>    ZnClient new 
>        signalProgress: true; 
>        url: 'http://zn.stfx.eu/zn/small.html';
>        downloadTo: FileSystem workingDirectory fullPath
> Process class>>allocatePSKey: adds the psv ZnSignalProgress to PSKeys.
> Later, when Process>psValueAt:put: is called, env is initialized if nil, but
> it's not nil (maybe because ZnConnectionTimeout has been used previously?).
> This is probably the first time we encountered two PSVs in the image at the
> same time, which flushed out the bug. In this case, env is not updated, and
> access is attempted to index 2, which doesn't exist.
> This attached fileout resizes already-initialized envs if they need to be
> updated due to more PSVs having been added. It's ugly, but I want Igor to
> take a look before I clean it up to make sure we're on the right track.
> --
> View this message in context: http://forum.world.st/We-have-a-HorribleErrorBlockingEverything-tp4640055p4640113.html
> Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

Marcus Denker -- http://marcusdenker.de

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