6. Release notes for version 8.6.4¶
GHC 8.6.4 is a bug-fix release, fixing a few regressions found in 8.6.3.
6.1. Highlights¶
The highlights, since the 8.6.3 release, are:
- Inconsistencies between the versions of
transformersandprocessshipped with the compiler and those present on Hackage have been resolved (Trac #16199). - A patch fixing a set of linker failures on Windows has been reverted as it unfortunately caused (Trac #15105, Trac #15894, Trac #15934)
- A bug wherein changes in default method definitions would fail to trigger recompilation has been fixed (Trac #15970).
- A bug wherein plugins would fail to lookup names not in scope in the module being compiled has been fixed (Trac #16104)
- A bug resulting in hangs during RTS shutdown on Darwin has been resolved (Trac #16150)
- A bug where some programs involving
StaticDatawould be rejected with either a typechecking error or internal compiler error has been fixed (Trac #16141) - A bug where compilation on Windows can fail with linker errors referring to
__chkstk_mshas been fixed (Trac #16166)
6.2. Known issues¶
Note that the LLVM code generator (-fllvm) in GHC 8.6, as well as
all earlier releases, are affected by Trac #14251, which can result in
miscompilation of some programs calling functions with unboxed floating-point
arguments. While originally scheduled to be fixed for this release, the fix
ended up being more difficult than anticipated and, given that issue is not a
strict regression from 8.4, we decided to proceed with the release.
6.3. 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 | 8.6.5 | The compiler itself |
| Cabal | 2.4.0.1 | Dependency of ghc-pkg utility |
| Win32 | 2.6.1.0 | Dependency of ghc library |
| array | 0.5.3.0 | 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 | 8.6.5 | Internal compiler library |
| ghc-compact | 0.1.0.0 | Core library |
| ghc-prim | 0.5.3 | Core library |
| ghci | 8.6.5 | 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 | 1.6.5.0 | 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 | 0.5.6.2 | Dependency of ghc library |
| unix | 2.7.2.2 | Dependency of ghc library |
| xhtml | 3000.2.2.1 | Dependency of haddock executable |