[etoys-dev] DNU after finish update

[karl ramberg]

Great work, Bert :-)

Karl

On Mon, May 24, 2010 at 3:50 AM, Bert Freudenberg <bert at freudenbergs.de>wrote:

> On 24.05.2010, at 00:33, Bert Freudenberg wrote:
> > On 23.05.2010, at 22:32, Ricardo Moran wrote:
> >> Hi, I don't know if you notice the same error but every time I click
> "update from server" I get a DNU. I clicked "Abandon" and I think the update
> finished ok. I don't know how to fix this and I'm not sure of the
> consequences of clicking "Abandon".
> >> I attach the log file, maybe that helps. Thanks
> >
> > I've noticed that too, not sure of the cause. Need to investigate - but
> it's somehow not finding the base for mcd packages.
>
> 3 hours of intense debugging later ...
>
> Found the problem. The version info dictionary cache dictionary gets
> corrupted. Because of an optimization introduced in 2006. Have a look at
> Dictionary>>at:ifAbsentPut:. If the "absent" case block modifies the
> dictionary, it might get rehashed, so the put needs to go to another index.
> But for efficiency, the index was re-used.
>
> Interestingly, this "optimization" is not in Squeak Trunk, I guess the flaw
> was discovered and got reverted in the mean time.
>
> I just committed Collections-bf.7 which reverts the method to the simple
> old version. And now I need some sleep, it's almost 4 am. Over and out :)
>
> - Bert -
>
>
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