[squeak-dev] Re: [Vm-dev] New Window VM (Closures, FT2Plugin,
Large Cursors)
Keith Hodges
keith_hodges at yahoo.co.uk
Tue Mar 10 00:21:36 UTC 2009
Eliot Miranda wrote:
>
>
> On Mon, Mar 9, 2009 at 3:58 PM, Keith Hodges <keith_hodges at yahoo.co.uk
> <mailto:keith_hodges at yahoo.co.uk>> wrote:
>
> Keith Hodges wrote:
> > Keith Hodges wrote:
> >
> >>> I will at some point push out a 3.8.22 VM that should put up a
> more
> >>> helpful dialog message, but people who have older VMs underfoot
> >>> should realize this behaviour should be an indication that perhaps
> >>> your VM is too old.
> >>>
> >>>
> >> Unfortunately the machine that I have designated for Bob to be
> an auto
> >> build/test server is a power-pc machine. What are the chances of a
> >> power-pc version of the closures vm?
> >>
> >> just interested to know
> >>
> >> Keith
> >>
> > Ok I see it is designated beta1U for universal, so the problem lies
> > elsewhere!
> >
> > Keith
> >
> OK so assigining to closure temporaries is no-longer allowed and
> flags a
> syntax error (not my code you understand)
>
>
> There is a preference that allows one to compile old code that does
> assign to block arguments. Its called allowBlockArgumentAssignment.
> Of course one can assign to closure temporaries. e.g.
>
> self do: [:i| | j | j := i + 1. ...
>
> But assigning to a block argument is dubious.
>
Working in 3.10.2-Closures image.
I dutifully rewrote the offending code (Installer-Formats-kph.4.mcz) and
bootstrapped it using a bog standard fileIn from the snapshot/source.st
file. However the first thing that happens is that MczInstaller
recompiles (invoked from #newSubclassOf: newSuper type: type
instanceVariables: instVars from: oldClass) not sure why since the class
instVar layout hasnt changed at all.
In this case I am probably better off removing the old class before I
load the new one, however, this indicates the nature of potential
problems to come.
Keith
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