Hi Eliot, I am experiencing the same problem as Lukas. I was having random DNU on replaced methods. I fixed the problem by flushing the cache on the compiled methods only, before I was flushing on the selector and on the class. It is not yet clear to me what is the right way of flushing the cache. Any explanation on that? I think that this goes along with http://code.google.com/p/pharo/issues/detail?id=2255 http://forum.world.st/flushCache-with-MethoWrappers-in-CogVM-td3381310.html Eliot, if you need help debugging or testing a potential solution let me know, I have a bunch of test working on top of this. Cheers, On Mon, Jul 11, 2011 at 6:31 PM, Eliot Miranda <eliot.miranda@gmail.com> wrote:

Hi All,     I'm in touch with Lukas on this but have no time to address it right now.  worry not :)

On Mon, Jul 11, 2011 at 3:05 AM, Mariano Martinez Peck <marianopeck@gmail.com> wrote:

...

Maybe cc'ing VM mailing list can help.

On Fri, Jul 1, 2011 at 9:32 AM, Lukas Renggli <renggli@gmail.com> wrote:

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Hi Eliot,

I am using one of the latest VMs from your site (VM.r2434) and I continue to have subtle problems with objects as methods (#flushCache, #run:with:in:).

The issue is that the test coverage in Pharo is kind of broken on Cog for a long time already. It reports methods as not covered that are clearly covered, and tests seem to randomly fail.

I suspected that there is something wrong with the coverage code itself. So I started to experiment with TestCoverage>>flushCache and noticed that the current implementation

   TestCoverage>>flushCache        self reference methodSymbol flushCache

performs not that well: The set of not covered methods is wrong and many tests suddenly fail. If I replace it with

   TestCoverage>>flushCache        self reference actualClass flushCache

I actually get accurate coverage information, but there are still a few tests constantly failing. I tried to use all possible combinations of #flushCache (also calling it on the compiled method), but only flushing the cache on the class seems to work properly. So far so good, but I really wonder what the correct way is to flush the cache? :-)

For my experiments I was using the package 'AST-Tests-Semantics'. This is a small package with lots of test methods that cover each method but one (RBSemanticAnnotationMisssing>>#isResumable). Now the "real" problem is that when running these tests in coverage mode, the same 4 tests always fail:

    RBSemanticTest>>testBlockScope     RBSemanticTest>>testCascadeReceiver     RBSemanticTest>>testClassVariableBinding     RBSemanticTest>>testGlobalVariableBinding

Not sure of how to debug that? Do you have an idea why these otherwise passing tests suddenly fail? If you want to try to reproduce you can use any Pharo image with the tests loaded, or use those that I used:

    http://jenkins.lukas-renggli.ch/job/Development/lastSuccessfulBuild/artifact...     http://jenkins.lukas-renggli.ch/job/Development/lastSuccessfulBuild/artifact...

Open the Test Runner, select 'AST-Tests-Semantics' and 'Run Coverage'.

Any help or clarification would be appreciated :-)

Lukas

-- Lukas Renggli www.lukas-renggli.ch

-- Mariano http://marianopeck.wordpress.com

-- best, Eliot

-- Jorge Ressia www.jorgeressia.com