<div dir="ltr"><div>Hi Ben, Richard and GHC team,</div><div><br></div><div>I appreciate your great effort.</div><div>The rc4 simply represents `$` type in ghci.</div><div><br></div><div> $ ./ghcii.sh</div><div> GHCi, version 8.0.0.20160421: <a href="http://www.haskell.org/ghc/">http://www.haskell.org/ghc/</a> :? for help</div><div> Prelude> :t ($)</div><div> ($) :: (a -> b) -> a -> b</div><div><br></div><div>Newcomers may love it :)</div><div><br></div><div>Thank you very much,</div><div>Takenobu</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2016-04-28 18:10 GMT+09:00 Ben Gamari <span dir="ltr"><<a href="mailto:ben@well-typed.com" target="_blank">ben@well-typed.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Hello Haskellers,<br>
<br>
The GHC team is happy to announce the availability of fourth release<br>
candidate of the Glasgow Haskell Compiler's 8.0.1 release. Source and<br>
binary distributions can be found at,<br>
<br>
<a href="http://downloads.haskell.org/~ghc/8.0.1-rc4/" rel="noreferrer" target="_blank">http://downloads.haskell.org/~ghc/8.0.1-rc4/</a><br>
<br>
This is the last of four candidates leading up to the 8.0.1 release,<br>
addressing nearly all of the known issues of the previous candidates.<br>
These include,<br>
<br>
* A type-checker panic triggered by use of Typeable on a<br>
kind-polymorphic type constructor (#11334)<br>
<br>
* A type-checker explosion where -XTypeInType would gobble up massive<br>
amounts of memory when used in a data instance (#11407)<br>
<br>
* A variety of other typechecker issues (#11811, #11797, #11813,<br>
#11814)<br>
<br>
* A build issue seen on OS X (#11828)<br>
<br>
* Template Haskell can now produce instances with<br>
OVERLAPP{ING,ABLE,ED} pragmas<br>
<br>
* Autoconf has improved version checks for libdw (#11820)<br>
<br>
* Typeable and hs-boot files now interact nicely (#11824)<br>
<br>
* The build system now checks for the broken Apple `nm` utility<br>
(#11823, #11744)<br>
<br>
* Various issues involving unexpected laziness resulting in exception<br>
handlers not being invoked (#11555)<br>
<br>
* GHC now fails more gracefully when used with an older cabal-install<br>
release (#11558)<br>
<br>
* TypeInType now has proper documentation in the users guide (#11614)<br>
<br>
* The story surrounding type `RuntimeRep`s (formerly known as<br>
`Levity`) is now far better developed, closing several doors to<br>
unsafe behavior that TypeInType previously opened (#11473, #11723)<br>
<br>
* A long-standing bug in the constant-folding rules for `mod` for the<br>
`Word` type has been resolved (#11702)<br>
<br>
* Various issues introduced by OverloadedRecordFields have been fixed<br>
(#11662, #11401)<br>
<br>
* A regression in the typechecker resulting in the rejection of code<br>
in the `free` and `microlens` packages has been fixed (#11608)<br>
<br>
* A bug in the LLVM code generator which caused some programs to emit<br>
unbuildable LLVM IR has been fixed (#11649)<br>
<br>
* A bug where pattern synonyms defined in terms of a pattern match on<br>
a record would be rejected if the fields weren't written in the same order<br>
as they were defined has been resolved (#11633)<br>
<br>
* A bug in the runtime system's treatment of weak references which<br>
could result in segmentation faults in some cases has been fixed (#11108)<br>
<br>
* a variety of optimizations improving compiler performance have been<br>
merged<br>
<br>
* and many others<br>
<br>
Mac OS X users should be aware that the recent XCode 7.3 release ships<br>
with a broken `nm` utility which breaks the GHC build (#11744, #11823).<br>
The build system will check for this condition and request that the tree<br>
is configured to use the `nm-classic` utility if found. OS X users<br>
running XCode 7.3 are encouraged to open a ticket with Apple so that<br>
this issue may be fixed in future XCode releases.<br>
<br>
If no major issues pop up we expect that this will be the last release<br>
candidate before the final release, which we hope to push out in the<br>
coming weeks. Thanks to everyone who has contributed code, testing,<br>
builds, and bug reports thusfar!<br>
<br>
Cheers and happy testing,<br>
<br>
- Ben<br>
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<br></blockquote></div><br></div>