3. Release notes for version 8.4.2

TODO

3.1. Highlights

The highlights, since the 8.4.1 release, are:

• TODO

3.2. Full details

3.2.1. Language

• Fix a regression in which derived Read instances for record data types with field names ending with # (by way of -XMagicHash) would no longer parse valid output.

3.2.2. Compiler

3.2.3. Runtime system

3.2.4. Template Haskell

3.2.5. ghc library

3.2.6. base library

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

3.2.7. integer-gmp library

• Define powModSecInteger, a “secure” version of powModInteger using the mpz_powm_sec function.

3.2.8. Build system

3.3. 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	8.6.1	The compiler itself
Cabal	2.4.0.1	Dependency of ghc-pkg utility
Win32	2.6.1.0	Dependency of ghc library
array	0.5.2.0	Dependency of ghc library
base	4.12.0.0	Core library
binary	0.8.6.0	Dependency of ghc library
bytestring	0.10.8.2	Deppendency of ghc library
containers	0.6.0.1	Dependency of ghc library
deepseq	1.4.4.0	Dependency of ghc library
directory	1.3.3.0	Dependency of ghc library
filepath	1.4.2.1	Dependency of ghc library
ghc-boot	8.6.1	Internal compiler library
ghc-compact	0.1.0.0	Core library
ghc-prim	0.5.3	Core library
ghci	8.6.1	The REPL interface
haskeline	0.7.4.3	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	2.14.0.0	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