[ANNOUNCE] GHC 8.0.1 release candidate 4 available

[Takenobu Tani]

Hi Ben, Richard and GHC team,

I appreciate your great effort.
The rc4 simply represents `$` type in ghci.

  $ ./ghcii.sh
  GHCi, version 8.0.0.20160421: http://www.haskell.org/ghc/  :? for help
  Prelude> :t ($)
  ($) :: (a -> b) -> a -> b

Newcomers may love it :)

Thank you very much,
Takenobu


2016-04-28 18:10 GMT+09:00 Ben Gamari <ben at well-typed.com>:

>
> Hello Haskellers,
>
> The GHC team is happy to announce the availability of fourth release
> candidate of the Glasgow Haskell Compiler's 8.0.1 release. Source and
> binary distributions can be found at,
>
>     http://downloads.haskell.org/~ghc/8.0.1-rc4/
>
> This is the last of four candidates leading up to the 8.0.1 release,
> addressing nearly all of the known issues of the previous candidates.
> These include,
>
>   * A type-checker panic triggered by use of Typeable on a
>     kind-polymorphic type constructor (#11334)
>
>   * A type-checker explosion where -XTypeInType would gobble up massive
>     amounts of memory when used in a data instance (#11407)
>
>   * A variety of other typechecker issues (#11811, #11797, #11813,
>     #11814)
>
>   * A build issue seen on OS X (#11828)
>
>   * Template Haskell can now produce instances with
>     OVERLAPP{ING,ABLE,ED} pragmas
>
>   * Autoconf has improved version checks for libdw (#11820)
>
>   * Typeable and hs-boot files now interact nicely (#11824)
>
>   * The build system now checks for the broken Apple `nm` utility
>     (#11823, #11744)
>
>   * Various issues involving unexpected laziness resulting in exception
>     handlers not being invoked (#11555)
>
>   * GHC now fails more gracefully when used with an older cabal-install
>     release (#11558)
>
>   * TypeInType now has proper documentation in the users guide (#11614)
>
>   * The story surrounding type `RuntimeRep`s (formerly known as
>     `Levity`) is now far better developed, closing several doors to
>     unsafe behavior that TypeInType previously opened (#11473, #11723)
>
>   * A long-standing bug in the constant-folding rules for `mod` for the
>     `Word` type has been resolved (#11702)
>
>   * Various issues introduced by OverloadedRecordFields have been fixed
>     (#11662, #11401)
>
>   * A regression in the typechecker resulting in the rejection of code
>     in the `free` and `microlens` packages has been fixed (#11608)
>
>   * A bug in the LLVM code generator which caused some programs to emit
>     unbuildable LLVM IR has been fixed (#11649)
>
>   * A bug where pattern synonyms defined in terms of a pattern match on
>     a record would be rejected if the fields weren't written in the same
> order
>     as they were defined has been resolved (#11633)
>
>   * A bug in the runtime system's treatment of weak references which
>     could result in segmentation faults in some cases has been fixed
> (#11108)
>
>   * a variety of optimizations improving compiler performance have been
>     merged
>
>   * and many others
>
> Mac OS X users should be aware that the recent XCode 7.3 release ships
> with a broken `nm` utility which breaks the GHC build (#11744, #11823).
> The build system will check for this condition and request that the tree
> is configured to use the `nm-classic` utility if found. OS X users
> running XCode 7.3 are encouraged to open a ticket with Apple so that
> this issue may be fixed in future XCode releases.
>
> If no major issues pop up we expect that this will be the last release
> candidate before the final release, which we hope to push out in the
> coming weeks. Thanks to everyone who has contributed code, testing,
> builds, and bug reports thusfar!
>
> Cheers and happy testing,
>
> - Ben
>
> _______________________________________________
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> Glasgow-haskell-users at haskell.org
> http://mail.haskell.org/cgi-bin/mailman/listinfo/glasgow-haskell-users
>
>
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