GHC 8.4.3 released

Ben Gamari - 2018-05-29

Hello everyone,

The GHC team is pleased to announce the availability of GHC 8.4.3. The source distribution, binary distributions, and documentation for this release are available here.

This release includes a few bug fixes including:

• A code generation bug resulting in crashing of some programs using UnboxedSums has been fixed (#15038).

• #14381, where Cabal and GHC would disagree about abi-depends, resulting in build failures, has been worked around. Note that the work-around patch has already been shipped by several distributions in previous releases, so this change may not be visible to you.

• By popular demand, GHC now logs a message when it reads a package environment file, hopefully eliminating some of the confusion wrought by this feature.

• GHC now emits assembler agreeable to newer versions of Gnu binutils, fixing #15068.

• SmallArray#s can now be compacted into a compact region

Thanks to everyone who has contributed to developing, documenting, and testing this release!

As always, let us know if you encounter trouble.