On Fri, Sep 23, 2011 at 10:53 PM, St�phane Ducasse <stephane.ducasse@inria.fr> wrote:

Thanks eliot.

Do you have tests that we could harvest to create a non regession database?

Alas not in this case. �The bug manifests itself when a cog code compaction occurs soon after an MNU PIC has been created and the symptom is a fatal crash. �So a) it is very difficult to reproduce and b) there would be no neat test failure, there would be a core dump. �Yes this is useful for a Jenkins context, but in general I think it better to test things like this with heavy stress tests (and general community usage) rather than trying to produce a specific test.

Stef

> ...in http://www.mirandabanda.org/files/Cog/VM/VM.r2495/. �These fix the regression introduced in r2487 in
> introducing faster MNu processing. �The bug was the leaking up of an error code that was misinterpreted as
> a valid target machine code method. �Thanks /very/ much to those of you who tested the 2493 & 2494 VMs.
> With your help this bug was found quickly. �I now have reason to hope that these VMs will be quite stable.
>
>
> Here's the readme:
> CogVM binaries as per VMMaker.oscog-eem.127/r2495. �Fix MNU PIC creation not
> to answer an error code to the interpreter. �This is the call 0x00000013 bug.
>
> again thanks
> --
> best,
> Eliot
>