We are pleased to announce the release of Ruby 2.1.0-preview2. Please test the new features in Ruby 2.1 before the final release! ## Notable changes from preview 1 * fix [Heap Overflow in Floating Point Parsing (CVE-2013-4164)](http://staging.ruby-lang.org/en/news/2013/11/22/heap-overflow-in-floating-point-parsing-cve-2013-4164/) * "literal".freeze is now optimized [#9042](https://bugs.ruby-lang.org/issues/9042) * f suffix of String Literal is removed [#9042](https://bugs.ruby-lang.org/issues/9042) * fix memory consuming issue on RGenGC ([r43532](http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=43532) and [r43755](http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=43755)) * add Exception#cause [#8257](https://bugs.ruby-lang.org/issues/8257) * update libraries like json, nkf, rake, RubyGems, and RDoc. ## Download * [ ](http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-preview2.tar.bz2) SIZE: 11432454 bytes MD5: 9d566a9b2d2e7e35ad6125e2a14ce672 SHA256: 780fddf0e3c8a219057d578e83367ecfac5e945054b9f132b3b93ded4802d1ce * [http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-preview2.tar.gz](http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-preview2.tar.gz) SIZE: 14416029 bytes MD5: ba2b95d174e156b417a4d580a452eaf5 SHA256: a9b1dbc16090ddff8f6c6adbc1fd0473bcae8c69143cecabe65d55f95f6dbbfb * [http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-preview2.zip](http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-preview2.zip) SIZE: 16110720 bytes MD5: 2ad1aa3d89ae32607cf14fc73b192de1 SHA256: cc2f7f8e05daed716489e5480e6365a711a13ed7747dbc59e989a41fe2805076 ## Changes from 2.0 The notable changes are: * VM (method cache) * RGenGC(See ko1's [RubyKaigi presentation](http://rubykaigi.org/2013/talk/S73) and [RubyConf2013 presentation](http://www.atdot.net/~ko1/activities/rubyconf2013-ko1_pub.pdf)) * refinements [#8481](https://bugs.ruby-lang.org/issues/8481) [#8571](https://bugs.ruby-lang.org/issues/8571) * syntax changes * Decimal/Complex Literal [#8430](https://bugs.ruby-lang.org/issues/8430) * def's return value [#3753](https://bugs.ruby-lang.org/issues/3753) * Bignum * use 128bit integers [#8509](https://bugs.ruby-lang.org/issues/8509) * use GMP [#8796](https://bugs.ruby-lang.org/issues/8796) * String#scrub [#8414](https://bugs.ruby-lang.org/issues/8414) * Socket.getifaddrs [#8368](https://bugs.ruby-lang.org/issues/8368) * RDoc 4.1.0.preview.2 and RubyGems 2.2.0.preview.2 See more details of changes: [NEWS in ruby repository(WIP)](https://github.com/ruby/ruby/blob/v2_1_0_preview2/NEWS). ko1 talked about the new features of Ruby 2.1 at toruby: [All about Ruby 2.1](http://www.atdot.net/~ko1/activities/toruby05-ko1.pdf) Konstantin Haase (@konstantinhaase) wrote good summary in his blog post: [What's new in Ruby 2.1?](http://rkh.im/ruby-2.1). ## Release Comment Known issues are: [http://bugs.ruby-lang.org/projects/ruby-trunk/issues?query_id=102](http://bugs.ruby-lang.org/projects/ruby-trunk/issues?query_id=102) See also the release schedule and other information: [http://bugs.ruby-lang.org/projects/ruby-trunk/wiki/ReleaseEngineering210](http://bugs.ruby-lang.org/projects/ruby-trunk/wiki/ReleaseEngineering210) -- NARUSE, Yui <naruse / airemix.jp>