That's something we will have to look out for, too ...
- Bert -
Begin forwarded message:
From: Andreas Raab andreas.raab@gmx.de Date: 16. März 2010 00:05:42 MEZ To: The general-purpose Squeak developers list squeak-dev@lists.squeakfoundation.org Cc: Squeak Virtual Machine Development Discussion vm-dev@lists.squeakfoundation.org Subject: [Vm-dev] Re: Some notes about SqueakMap dead in trunk images... Reply-To: Squeak Virtual Machine Development Discussion vm-dev@lists.squeakfoundation.org
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.
Cheers,
- Andreas