On Wed, Aug 27, 2008 at 11:18:46AM +0100, Claus Reinke wrote:
> 
> In this case, I was told that base3-compat was provided
> explicitly to avoid breakage[1], and as I reported, that 
> doesn't seem to be the case [2].

It'll only work for packages that correctly depend on something like:
    base >= x && < 4

Packages that just depend on "base" won't work. Nor will packages that
have been updated to work with:
    either base >= x && < 4
    or     base >= 4 && < 5
but haven't kept their base 4 sections up-to-date.

> As I've mentioned, I see those extralibs as a good test of
> whether changes to ghc+corelibs are going to cause havoc
> in the wild,

As extralibs are likely to be partially updated, I don't think they are
necessarily a good test of what is likely to happen in the wild.


Thanks
Ian

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