6. Release notes for version 8.4.4¶
6.1. Highlights¶
This is a bug-fix release resolving several regressions introduced in 8.4.1.
The highlights, since the 8.4.3 release, are:
- A bug which could result in memory unsafety with certain uses of
touch#has been resolved. (Trac #14346) - A compiler panic triggered by some GADT record updates has been fixed (Trac #15499)
- The
textlibrary has been updated, fixing several serious bugs in the version shipped with GHC 8.4.3 (see #227, #221, and #197. - A serious code generation bug in the LLVM code generation, potentially resulting in incorrect evaluation of floating point expressions, has been fixed (Trac #14251)
6.2. Full details¶
In addition to the highlights listed above, this release resolves a number of other issues, described below.
6.2.1. Compiler¶
- A compiler panic triggered by case alternatives matching on invalid tags
returned by
dataToTag#, has been fixed (Trac #15436) - Package environments can now be explicitly disabled using the new
-package-env -flag. (Trac #13753)
6.2.2. Runtime system¶
No changes.
6.2.3. Template Haskell¶
No changes.
6.2.4. ghc library¶
No changes.
6.2.5. base library¶
- Version bumped to 4.11.1.0 to account for the addition of
GHC.IO.FixIOException - Add the
readFieldHashfunction toGHC.Readwhich behaves likereadField, but for a field that ends with a#symbol.
6.2.6. integer-gmp library¶
No changes.
6.2.7. Build system¶
No changes.
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 | 8.4.4 | 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 |