On Thu, 2009-07-30 at 15:12 +0200, Christian Maeder wrote:

Don Stewart wrote:

...

Heads up lads, we're about 24 hours from Haskell Platform 2009.2.0.2

http://code.haskell.org/haskell-platform/haskell-platform.cabal

I still see

time ==1.1.2.4,

although ghc-6.10.4 comes with:

time-1.1.4

http://trac.haskell.org/haskell-platform/ticket/74

Is this on purpose (possibly installing two time versions)?

Yes it is on purpose. The HP policy is to keep the same API for a whole major release series. That is, the API of packages included in each minor release of 2009.2.0.x are the same. The initial release 2009.2.0 included time-1.1.2.4 and so subsequent releases must use a compatible version. Version of time in the "extralibs" tarball in ghc-6.10.x releases: * GHC-6.10.1: time-1.1.2.4 * GHC-6.10.2: none * GHC-6.10.3: time-1.1.3 * GHC-6.10.4: time-1.1.4 So we have the current situation where the HP supplies one version and ghc's extralibs tarball includes a different version. As far as I know, the windows and osx HP installers (which include ghc) only include one version of time. For the source installer of course we cannot control other pre-existing versions.

I only know that time-1.1.4 and time-1.1.3 supply more Typeable instances (which may break existing code)

Right, that's not allowed in a HP minor release as it's an API change. Duncan