2.1. Version 9.4.8

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 10, 11, 12, 13, or 14.

2.1.1. Significant Changes

Issues fixed in this release include: Compiler

  • Fix a recompilation checking bug where GHC may miss changes in transitive dependencies when deciding to relink a program (#23724).
  • Fix a compiler panic resulting from incorrect eta-reduction of join points (#23922).
  • Fix a code generator bug on AArch64 platforms resulting in invalid conditional jumps (#23746).
  • Improve STG code generation in certain scenarios (#23783).
  • Fix a bug where we could silently truncate 64 bit values to 32 bit on 32 bit architectures.
  • Fix -split-sections on Windows (#22834). Runtime system

  • Remove an assertion prone to race conditions (#22563).
  • Fix some crashes and loops with the non-moving GC (#24042, :ghc-ticket:`23003).
  • Properly escape characters when writing JSON profiles (-pJ) (#23924). Build system and packaging

  • Ensure -split-sections is enabled while building binary distributions for all platforms where this is supported (#21135).
  • Make the configure script use AC_PATH_TOOL instead of AC_PATH_PROG to detect tools, making cross-compilation easier (#21601).
  • Fix a bug where -DNOSMP wasn’t being passed to the C compiler even if the target doesn’t support SMP (#24082). Core libraries

  • Bump base to
  • Bump bytestring to
  • Bump process to 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 9.4.8 The compiler itself
Cabal-syntax Dependency of ghc-pkg utility
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 0.6.7 Dependency of ghc library
deepseq Dependency of ghc library
directory Dependency of ghc library
exceptions 0.10.5 Dependency of ghc and haskeline library
filepath Dependency of ghc library
ghc-boot-th 9.4.8 Internal compiler library
ghc-boot 9.4.8 Internal compiler library
ghc-compact Core library
ghc-heap 9.4.8 GHC heap-walking library
ghc-prim 0.9.1 Core library
ghci 9.4.8 The REPL interface
haskeline 0.8.2 Dependency of ghci executable
hpc Dependency of hpc executable
integer-gmp 1.1 Core library
libiserv 9.4.8 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 2.0.2 Dependency of Cabal library
time 1.12.2 Dependency of ghc library
transformers Dependency of ghc library
unix 2.7.3 Dependency of ghc library
xhtml 3000.2.2.1 Dependency of haddock executable