I really don't know why this has not been added to the export list earlier. So here it is. This fixes issue #41.
There are no other compilers.
GHC 7.7 now exports fromList/toList for GHC.Exts which conflict with names defined in this module.
Prior to this change, the computation of the hash h0 = hash k0 would create an extra thunk in every call to e.g. 'lookup'.
GHC 7.0.4 ships with containers-0.4 and the latter cannot be easily upgraded as that would break template-haskell.