gistfile1.txt

---
layout: post
title: JRuby 1.6.0.RC2 Released
---
The JRuby community is pleased to announce the release of JRuby 1.6.0.RC2.

- Homepage: [http://www.jruby.org/](http://www.jruby.org/)
- Download: [http://www.jruby.org/download](http://www.jruby.org/download)

JRuby 1.6.0.RC2 is the second release candidate of JRuby 1.6.0.

JRuby 1.6.0 is the largest release of JRuby to date. This release
fixes hundreds of user issues and brings compatibility with Ruby 1.9.2
to a very high level. We have made Windows a primary supported
platform by adding it as a continuous integration platform, and JRuby
1.6 will provide Windows-based Ruby users with the best experience
yet. This release integrates experimental support for C extensions
based on Ruby's C API. And as with all major releases, we have
improved stability and performance across the board in response to
real-world user input.

We encourage Ruby and JRuby users alike to test out 1.6.0.RC2 to help
us shake out remaining issues. It would be especially helpful if users
would test out 1.9 mode (by passing --1.9 flag) to help us round out
our 1.9.2 compatibility before the final 1.6.0 release.

Notable changes since 1.6.0.RC1:
- Large number of 1.9 compatibility issues addressed

 - Encoding issues (especially involving Regexp)
 - Fiddle implementation
 - non-ASCII identifiers
- irb (1.8.7, 1.9.2) and command prompt added to Windows installer
- Compiler handles all 1.9 syntax now
- Fixes for new backtrace accuracy, reliability
- Removed all GPL or LGPL-only dependencies
- Updated to RubyGems 1.5.0
- C extension support prebuilt for OS X, Linux (32/64), Windows (32)
- 83 issues resolved since RC1

Major Features:

- Ruby 1.9.2 language and API compatibility

  - Not implemented Encoding::Converter, ripper
- Improved Ruby call performance
- Built-in profiler (--profile, --profile.graph)
- RubyGems 1.4.2
- RSpec no longer bundled
- C Extension support (experimental)
- RubyGems Maven support (preview)
- Improved compatibility and user experience on Windows
- jruby-complete.jar now includes 1.9 standard library
- Embedding API refinements
- Over 2000 commits and 265 issues resolved.

Issues fixed since 1.6.0.RC1
JRUBY-5382	Timeout is firing late under load
JRUBY-4764	Leaking fileno to ChannelDescriptor mappings in Ruby.retainedDescriptors.
JRUBY-5345	require 'ffi' breaks in windows jar when the path to the jar contains spaces/special chars
JRUBY-5229	Interpreter is slower for microbenchmarks after "backtrace" merge
JRUBY-5354	undefined method `map' for {}:Java::JavaUtil::HashMap
JRUBY-5341	[1.9] Rescuing a specific error throws up a Java Exception when $DEBUG is true
JRUBY-3331	to_f near Float::MAX
JRUBY-5460	ant test-1.9 doesn't run any test at all
JRUBY-5353	new map proxy's inspect method doesn't work when Map object is created in Ruby
JRUBY-2564	File.open interprets '/dir' as './dir' on Windows
JRUBY-5347	Float#round(int) isn't implemented in 1.9 mode
JRUBY-5358	Arg-passing or splatting error in jitted execution
JRUBY-5365	java.util.HashMap.new.kind_of? java.util.Map returns false
JRUBY-5372	[1.9] Failures in 1.9 test/ruby/test_alias
JRUBY-4878	Can't run ruby file with utf-8 characters
JRUBY-5377	Class.__subclasses__ incompatible with Rails
JRUBY-4816	Very simple bug with character replacing
JRUBY-5368	[1.9] Star and unnamed restarg treated differently in 1.9 mode Proc#parameters
JRUBY-5342	Add Scala-specific JI logic
JRUBY-5387	Unable to run Rails tests since we use Psych as default yaml lib
JRUBY-5315	Time constructors don't support fractional seconds
JRUBY-4580	unable to run jirb in --fast
JRUBY-4178	gzip oddity
JRUBY-5395	camelCase to snake_case conversion regression
JRUBY-4904	Aliased method fails equality test
JRUBY-4871	[1.9] Attempt to invoke any method on Delegator leads to ClassCastException
JRUBY-3434	Ruby 1.9 mode should guess system encoding if not specified
JRUBY-5399	[1.9] Dir#[] doesn't convert Pathname args to String
JRUBY-5219	Problem w/ JRuby, Warbler & Weblogic 10
JRUBY-4722	ant bails with unrecognized -d32 option on OS X on some architecture/os-version/java-version combinations
JRUBY-4946	Having an attribute named timeout breaks factory_girl under jruby
JRUBY-5366	jruby 1.6 RC1 ruby 1.9: org.jruby.RubyBasicObject cannot be cast to org.jruby.RubyObject
JRUBY-5417	Nil backtrace when overriding method_missing and calling super
JRUBY-5326	[1.9] Java error in Psych when running "gem build" command
JRUBY-5412	Strange each_slice/with_index combo exception
JRUBY-5016	[1.9] SyntaxError when a block var shadows local var
JRUBY-5356	--profile.graph sometimes shows wrong methods
JRUBY-5363	Kernel#caller behavior is different for files with .rbw extension
JRUBY-5261	RSpec >= 2.2 around hooks trigger runtime NPE
JRUBY-5406	[1.9] String#encode does not support "locale" as an encoding
JRUBY-5418	Getting NativeException: org.jruby.RubyContinuation$Continuation: null with RSpec 2 and EventMachine
JRUBY-5346	jruby 1.6.0.RC1 doesn't recognize multibyte strings in 1.9 branch
JRUBY-5389	IO.popen doesn't support Array of String's arg in 1.9 mode
JRUBY-5433	Process.abort should only accept string arguments
JRUBY-5431	Kernel#exit! without arg causes wrong process exit code
JRUBY-5236	test/org/jruby/util/shell_launcher_test is not getting +x set in src dist
JRUBY-5394	[1.9] Array#join using to_a instead of to_s when both defined
JRUBY-5436	File.open mode doesn't accept "r:ENC:-"
JRUBY-5407	add_method_signature causes a VerifyError if used for more than return type.
JRUBY-5364	become_java! / RubyClass.reify regression
JRUBY-5429	jruby-complete.jar relocates org.objectweb.asm, but jruby.jar does not
JRUBY-5143	Encoding of ByteList is not set
JRUBY-5444	IOJavaAddons.AnyIO pollutes Object unnecessarily
JRUBY-5450	Marshal.load and Marshal.dump not implemented?
JRUBY-5355	[1.9] defined? does not yet compile, is used by RubyGems
JRUBY-4749	require 'rbconfig' fails on GAE because of NullPointerException
JRUBY-4849	Provide or update links to source/project, attribution, and license info for *all* libraries ship with JRuby
JRUBY-5203	included Module is not picked up by runtime
JRUBY-4907	popen4 reports wrong PID on Windows
JRUBY-5343	ScriptingContainer throws LoadError when there are spaces in the classpath (Ruby 1.9 mode only)
JRUBY-5367	Rake/Gem::PackageTask fails with the rubygems 1.4 upgrade, when using java platform
JRUBY-5410	JRuby needs to provide a dist free of GPLed libraries, for GPL-sensitive consumers like Apache
JRUBY-5388	Requiring a filename with accented characters fails
JRUBY-5376	singleton_class.define_method creates private methods
JRUBY-5378	Memory Leak With JRuby/Tomcat
JRUBY-5413	Bundled version of Rubygems (1.4.2) fails when behind a proxy
JRUBY-5281	jruby-complete jar not working from directory with spaces
JRUBY-5213	--profile needs to dump even on ^C, other means of getting info, multi-thread
JRUBY-5453	NullPointerException in ScriptingContainer.setCurrentDirectory()
JRUBY-4910	jruby.exe + multibyte-character is broken
JRUBY-5448	Maven gem support should report and abort when using <mvn3
JRUBY-5336	jruby --1.9 Object#id should raise NoMethodError
JRUBY-5391	MongoMapper's usage of defined? is handled incorrectly
JRUBY-4488	Joni matches [^\w] incorrectly, and differently to MRI/187
JRUBY-5340	Non-greedy item can cause Regexp to get stuck
JRUBY-4951	1.9: Thread#backtrace should apply to the thread in question
JRUBY-5108	Regex incompatibility between MRI and JRuby
JRUBY-4768	'jruby -X' should be more friendly
JRUBY-5398	Generated Javadoc for ScriptingContainer cuts off in the middle
JRUBY-5430	RubyHash view objects should be static
JRUBY-5334	Abbrev.abbrev with multi-byte strings returns another result
JRUBY-5445	JRuby cannot parse a magic comment like #-*- mode: ruby; -*-
JRUBY-4949	Make ARGV via embedding work same as it does when running jruby itself
JRUBY-4271	interfaces on reified classes patch was incomplete and broke instances being passed to java code.