[ANNOUNCE] GHC 8.4.1-rc1 available

Ben Gamari ben at well-typed.com
Sun Feb 25 17:42:15 UTC 2018

The GHC development team is pleased to announce the first (and likely
final) release candidate of GHC 8.4.1. The usual release artifacts are
available from


This release will likely be the last release before the final 8.4.1
release, which, if things go well, will be released one week from today.

Due to user demand we now offer a binary distribution for 64-bit
Fedora 27, which links against ncurses6. This is in contrast to the
Debian 8 distribution, which links against ncurses5. Users of newer
distributions (Fedora 27, Debian Sid) should use this new Fedora 27

Also due to user demand we have reintroduced compatibility with GCC 4.4,
which earlier alphas had dropped due to #14244.

Note that this release candidate is still affected by #14705, although
this will certainly be resolved before the final release is made.

=== Notes on release scheduling ===

The 8.4.1 release marks the first release where GHC will be adhering to
its new, higher-cadence release schedule [1]. Under this new scheme,
major releases will be made in 6-month intervals with interstitial minor
releases as necessary.

In order to minimize the likelihood of schedule slippage and to ensure
adequate testing, each major release will be preceded by a number of
regular alpha releases. We will begin issuing these releases roughly
three months before the final date of the major release and will issue
roughly one every two weeks during this period. This high release
cadence will allow us to quickly get fixes into users' hands and
more quickly identify potential issues.

As always, do let us know if you encounter any trouble in the course of
testing. Thanks for your help!


- Ben

[1] https://ghc.haskell.org/trac/ghc/blog/2017-release-schedule
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