Hi all, Historically, Data.HashTable has been in base because Data.Typeable used it, but that is no longer the case. I propose that we: * Mark it as deprecated in the base that comes with GHC 7.6. * Remove it from the base that comes with GHC 7.8. Rationale: * Historically there have been performance problems with it, and we have been recommending people not to use it. I'm not sure if that's still the case or not. * If it is still useful then it would fit better in the containers package. However, as there is no reason that it needs to be tied to the GHC release schedule etc, it would be even better to put it in another package. In GHC, deSugar/Coverage.lhs does use the module, but only for hashString. We could put this elsewhere in base, but I think it would be better just to copy the definition into the GHC source. Suggested discussion deadline: Fri 29 June 2012. Thanks Ian