[Vm-dev] Re: Some notes about SqueakMap dead in trunk images...

Andreas Raab andreas.raab at gmx.de
Wed Mar 24 15:57:55 UTC 2010

On 3/24/2010 1:56 AM, Göran Krampe wrote:
> Andreas Raab wrote:
>> On 3/15/2010 1:26 PM, Göran Krampe wrote:
>>> But so far I am unclear as to why this is so. I have now tested LOTS of
>>> trunk images backwards and it seems to be broken all the way down to
>>> 7179! Funny thing is - my 3.10.1-7175 image works fine.
>>> And there may be a hint here: The 7175 image can be opened by an old
>>> 3-9-8 VM. But the later 7179 images can NOT be opened due to some kind
>>> of image format change.
>> Bingo. The issue is that the image format changed for closures and
>> there's been a bug in the image segment loading code that makes the
>> primitive fail in cases where the image format is older, but
>> compatible. I've posted a fix for that in VMMaker but I really think
>> SM should stop using image segments for data exchange. Image segments
>> are not a reliable long-term interchange format in an evolving system.
>> Obviously, this fix requires new VMs.
> So you are saying/proposing that 4.1 will be released with this new VM
> or? ;)

I very much hope so. The fix is in VMMaker we just need updated builds.

   - Andreas

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