2.5. Version 9.2.5

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.

2.5.1. Compiler

  • Fix a number of issues with the simplifier leading to core lint errors and suboptimal performance (#21694, #21755, #22114).
  • Fix a sign extension bug resulting in incorrent runtime results on the native aarch64 backend (#22282).
  • Improve determinism by not inclusing build directories in interface files (#22162).
  • Fix a code generation panic when using SIMD types with unboxed sums (#22187).
  • Fix a code generation bug with the native code generator on aarch64 darwin leading to runtime segmentation faults due to an incorrect ABI (#21964)

2.5.2. Runtime system

  • Fix a bug where attempting to clear the card table of a zero-length array resulted in an integer underflow (#21962).

2.5.3. Core libraries

  • Bump base to
  • Bump process to
  • base: Fix races in the IOManager to do with the setNumCapabilities and closeFdWith functions (#21651)

2.5.4. 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 9.2.8 The compiler itself
Cabal Dependency of ghc-pkg utility
Win32 Dependency of ghc library
array Dependency of ghc library
base Core library
binary Dependency of ghc library
bytestring Dependency of ghc library
containers Dependency of ghc library
deepseq Dependency of ghc library
directory Dependency of ghc library
exceptions 0.10.4 Dependency of ghc and haskeline library
filepath Dependency of ghc library
ghc-boot-th 9.2.8 Internal compiler library
ghc-boot 9.2.8 Internal compiler library
ghc-compact Core library
ghc-heap 9.2.8 GHC heap-walking library
ghc-prim 0.8.0 Core library
ghci 9.2.8 The REPL interface
haskeline 0.8.2 Dependency of ghci executable
hpc Dependency of hpc executable
integer-gmp 1.1 Core library
libiserv 9.2.8 Internal compiler library
mtl 2.2.2 Dependency of Cabal library
parsec Dependency of Cabal library
pretty Dependency of ghc library
process Dependency of ghc library
stm Dependency of haskeline library
template-haskell Core library
terminfo Dependency of haskeline library
text Dependency of Cabal library
time Dependency of ghc library
transformers Dependency of ghc library
unix Dependency of ghc library
xhtml 3000.2.2.1 Dependency of haddock executable