.. _release-8-8-2: Release notes for version 8.8.2 =============================== GHC 8.8.2 is a minor release intended to fix regressions and minor bugs in the 8.8.1. Highlights ---------- - A bug (:ghc-ticket:`17088`) in the compacting garbage collector resulting in segmentation faults under specific circumstances. Note that this may affect user programs even if they did not explicitly request the compacting GC (using the :rts-flag:`-c` RTS flag) since GHC may fallback to compacting collection during times of high memory pressure. - A code generator bug (:ghc-ticket:`17334`) resulting in GHC panics has been fixed. - A bug in ``process`` causing builds using ``hsc2hs`` to fail non-deterministically on Windows has been fixed (:ghc-ticket:`17480`) - A typechecker bug (:ghc-ticket:`17112`) resulting in GHC panicking on some programs has been fixed. - A bug (:ghc-ticket:`16707`) in the implementation of software transactional memory potentially resulting in hanging transactions has been fixed. - A bug in the implementation of compact normal forms resulting in segmentation faults in some uses (:ghc-ticket:`17044`) has been fixed. - A bug causing GHC to incorrectly complain about incompatible LLVM versions when using LLVM 7.0.1 has been fixed (:ghc-ticket:`16990`). Known issues ------------ - A long-standing bug (:ghc-ticket:`16893`) which can cause some applications of ``unsafeCoerce`` to segmentation fault is only partially fixed in this release. This release only avoids this issue in the uses of ``unsafeCoerce`` in ``Data.Typeable.Internal``, which was the proximate cause of :ghc-ticket:`16893`. However, it is possible that this bug could manifest in user-code using ``unsafeCoerce`` to perform dynamic type checks. See the :ghc-ticket:`ticket <16893>` for details. 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. .. ghc-package-list:: libraries/array/array.cabal: Dependency of ``ghc`` library libraries/base/base.cabal: Core library libraries/binary/binary.cabal: Dependency of ``ghc`` library libraries/bytestring/bytestring.cabal: Dependency of ``ghc`` library libraries/Cabal/Cabal/Cabal.cabal: Dependency of ``ghc-pkg`` utility libraries/containers/containers/containers.cabal: Dependency of ``ghc`` library libraries/deepseq/deepseq.cabal: Dependency of ``ghc`` library libraries/directory/directory.cabal: Dependency of ``ghc`` library libraries/filepath/filepath.cabal: Dependency of ``ghc`` library compiler/ghc.cabal: The compiler itself libraries/ghci/ghci.cabal: The REPL interface libraries/ghc-boot/ghc-boot.cabal: Internal compiler library libraries/ghc-boot-th/ghc-boot-th.cabal: Internal compiler library libraries/ghc-compact/ghc-compact.cabal: Core library libraries/ghc-heap/ghc-heap.cabal: GHC heap-walking library libraries/ghc-prim/ghc-prim.cabal: Core library libraries/haskeline/haskeline.cabal: Dependency of ``ghci`` executable libraries/hpc/hpc.cabal: Dependency of ``hpc`` executable libraries/integer-gmp/integer-gmp.cabal: Core library libraries/libiserv/libiserv.cabal: Internal compiler library libraries/mtl/mtl.cabal: Dependency of ``Cabal`` library libraries/parsec/parsec.cabal: Dependency of ``Cabal`` library libraries/process/process.cabal: Dependency of ``ghc`` library libraries/pretty/pretty.cabal: Dependency of ``ghc`` library libraries/stm/stm.cabal: Dependency of ``haskeline`` library libraries/template-haskell/template-haskell.cabal: Core library libraries/terminfo/terminfo.cabal: Dependency of ``haskeline`` library libraries/text/text.cabal: Dependency of ``Cabal`` library libraries/time/time.cabal: Dependency of ``ghc`` library libraries/transformers/transformers.cabal: Dependency of ``ghc`` library libraries/unix/unix.cabal: Dependency of ``ghc`` library libraries/Win32/Win32.cabal: Dependency of ``ghc`` library libraries/xhtml/xhtml.cabal: Dependency of ``haddock`` executable