[Haskell] [ANNOUNCE] GHC 8.4.1 released

Ben Gamari ben at well-typed.com
Mon Mar 19 17:17:52 UTC 2018

(Apologies for the belated announcement on this list)

The GHC developers are very happy to announce the 8.4.1 release of
Glasgow Haskell Compiler. Binary and source distributions can be found


This is the third major release in the GHC 8 series. As such, the focus
of this release is performance, stability, and consolidation.
Consequently numerous cleanups can be seen throughout the compiler

 * Further refinement of TypeInType, including significant improvements
   in error messages.

 * Improvements in code generation resulting in noticable performance
   improvements in some types of programs.

 * Core library improvements, including phase 2 of the Semigroup/Monoid

 * Many improvements to instance deriving

 * The resolution of nearly 300 other tickets

A more thorough list of the changes in this release can be found in the
release notes,


There are a few changes in release-engineering matters that should be

 * This is GHC's first release on it's new, accelerated release
   schedule. From now on GHC will produce one release every six months.

 * While we typically strive to produce OpenBSD builds, the gcc shipped
   with OpenBSD 6.1 is unfortunately too old to compile this release.

 * FreeBSD builds are still in progress

This release has been the result of approximately six months of work by
over one hundred code contributors. Thanks to everyone who has helped in
writing patches, testing, reporting bugs, and offering feedback over the
last year.

As always, let us know if you encounter trouble.

How to get it

The easy way is to go to the web page, which should be self-explanatory:


We supply binary builds in the native package format for many
platforms, and the source distribution is available from the same

Packages will appear as they are built - if the package for your
system isn't available yet, please try again later.


Haskell is a standard lazy functional programming language.

GHC is a state-of-the-art programming suite for Haskell.  Included is
an optimising compiler generating efficient code for a variety of
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language extensions, including concurrency, exceptions, and foreign
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Ports to other platforms are possible with varying degrees of
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