Current ghc-6.12 is ancient. What is in the overlay as recent is bleeding edge (7.6) and is still having bugs (for example some stuff with FFI is broken) Current 7.4.2 is what is provided as haskell platform (http://www.haskell.org/platform/) and supported by upstream. Reproducible: Always
The hint in FRIENDLY BIG LETTERS here ( http://www.haskell.org/ghc/download_ghc_7_6_2 ) underlines my clam.
*** Bug 457778 has been marked as a duplicate of this bug. ***
amd64 stable
x86 stable
*** Bug 460642 has been marked as a duplicate of this bug. ***
ppc stable
ppc64 stable
alpha stable
ia64 stable
sparc stable. Last arch, closing