2.7. Version 9.2.7¶
The significant changes to the various parts of the compiler are listed in the following sections.
The LLVM backend of this release is to be used with LLVM
9, 10, 11, or 12.
2.7.1. Compiler¶
- Fix a bug related to placeholder values (rubbish literals) emitted by
the worker/wrapper optimisation leading to
-dcore-linterrors and compiler panics in certain cases (#19882, #22914, #23000). - Fix a bug with the graph-colouring register allocater leading to compiler
panics when compiling with
-fregs-graphon AArch64 platforms with the native code generator. A fix was also attempted in GHC 9.2.6 but was incomplete (#22798, #23002).
2.7.2. Runtime system¶
- Fix a bug with the RTS linker being unable to resolve the
setKeepCAFssymbol which started being used by the GHC library in 9.2.6, resulting in code depending on this symbol failing to load in GHCi or via a compile time splice when using a statically linked GHC, such as on Windows (#22961). - Fix a bug with the alignment of RTS data structures that could result in segfaults when compiled with high optimisation settings on certain platforms (#22975 , #22965).
- Fix a RTS bug resulting in segfaults while using cost center profiling on code
that uses the
newArrayArray#primop (#22129). - Use C11 compatible static assertion syntax (#22777).
2.7.3. Build system and packaging¶
2.7.4. 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 | 9.2.7 | The compiler itself |
| Cabal | 3.6.3.0 | Dependency of ghc-pkg utility |
| Win32 | 2.12.0.1 | Dependency of ghc library |
| array | 0.5.4.0 | Dependency of ghc library |
| base | 4.16.4.0 | Core library |
| binary | 0.8.9.0 | Dependency of ghc library |
| bytestring | 0.11.4.0 | Dependency of ghc library |
| containers | 0.6.5.1 | Dependency of ghc library |
| deepseq | 1.4.6.1 | Dependency of ghc library |
| directory | 1.3.6.2 | Dependency of ghc library |
| exceptions | 0.10.4 | Dependency of ghc and haskeline library |
| filepath | 1.4.2.2 | Dependency of ghc library |
| ghc-boot-th | 9.2.7 | Internal compiler library |
| ghc-boot | 9.2.7 | Internal compiler library |
| ghc-compact | 0.1.0.0 | Core library |
| ghc-heap | 9.2.7 | GHC heap-walking library |
| ghc-prim | 0.8.0 | Core library |
| ghci | 9.2.7 | The REPL interface |
| haskeline | 0.8.2 | Dependency of ghci executable |
| hpc | 0.6.1.0 | Dependency of hpc executable |
| integer-gmp | 1.1 | Core library |
| libiserv | 9.2.7 | Internal compiler library |
| mtl | 2.2.2 | Dependency of Cabal library |
| parsec | 3.1.15.0 | Dependency of Cabal library |
| pretty | 1.1.3.6 | Dependency of ghc library |
| process | 1.6.16.0 | Dependency of ghc library |
| stm | 2.5.0.2 | Dependency of haskeline library |
| template-haskell | 2.18.0.0 | Core library |
| terminfo | 0.4.1.5 | Dependency of haskeline library |
| text | 1.2.5.0 | Dependency of Cabal library |
| time | 1.11.1.1 | 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 |