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 <b...@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 > > _______________________________________________ > Glasgow-haskell-users mailing list > Glasgow-haskell-users@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/glasgow-haskell-users > >
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