5. Release notes for version 8.4.3

5.1. Highlights

This is a bug-fix release resolving several regressions introduced in 8.4.1.

The highlights, since the 8.4.2 release, are:

  • A bug (Trac #15068) causing GHC to produce assembler that would be rejected by some versions of GNU Binutils, has been fixed.

  • GHC.Compact.compact now properly handles SmallArrays (Trac #13857)

  • A bug (Trac #15038) resulting in memory corruption and crashes in some uses of unboxed sums has been fixed.

  • GHC now logs a message when an environment file is loaded (Trac #15145).

5.2. Full details

In addition to the highlights listed above, this release resolves a number of other issues, described below.

5.2.1. Compiler

No changes beyond those listed in Highlights.

5.2.2. Runtime system

  • A bug causing aggressive potentially resulting in crashes when (nursery chunks) are used with a changing capability count has been fixed.

5.2.3. Template Haskell

No changes.

5.2.4. ghc library

No changes.

5.2.5. base library

  • Version bumped to 4.11.1.0 to account for the addition of GHC.IO.FixIOException

  • Add the readFieldHash function to GHC.Read which behaves like readField, but for a field that ends with a # symbol.

5.2.6. integer-gmp library

No changes.

5.2.7. Build system

No changes.

5.3. Included libraries

The package database provided with this distribution also contains a number of packages other than GHC itself. See the changelogs provided with these packages for further change information.

Package Version Reason for inclusion

ghc

8.4.4

The compiler itself

Cabal

2.2.0.1

Dependency of ghc-pkg utility

Win32

2.6.1.0

Dependency of ghc library

array

0.5.2.0

Dependency of ghc library

base

4.11.1.0

Core library

binary

0.8.5.1

Dependency of ghc library

bytestring

0.10.8.2

Deppendency of ghc library

containers

0.5.11.0

Dependency of ghc library

deepseq

1.4.3.0

Dependency of ghc library

directory

1.3.1.5

Dependency of ghc library

filepath

1.4.2

Dependency of ghc library

ghc-boot

8.4.4

Internal compiler library

ghc-compact

0.1.0.0

Core library

ghc-prim

0.5.2.0

Core library

ghci

8.4.4

The REPL interface

haskeline

0.7.4.2

Dependency of ghci executable

hpc

0.6.0.3

Dependency of hpc executable

integer-gmp

1.0.2.0

Core library

mtl

2.2.2

Dependency of Cabal library

parsec

3.1.13.0

Dependency of Cabal library

process

1.6.3.0

Dependency of ghc library

template-haskell

2.13.0.0

Core library

text

1.2.3.1

Dependency of Cabal library

time

1.8.0.2

Dependency of ghc library

transformers

0.5.5.0

Dependency of ghc library

unix

2.7.2.2

Dependency of ghc library

xhtml

3000.2.2.1

Dependency of haddock executable