# JRuby 1.3.0RC1 Released

**URL:** <https://www.ruby-forum.com/t/jruby-1-3-0rc1-released/167005>\
**Category:** Ruby\
**Created:** [May 1, 2009, 10:42pm UTC](https://www.ruby-forum.com/t/jruby-1-3-0rc1-released/167005 "2009-05-01T22:42:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Thomas\_E](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/8c91f0/32.png) [@Thomas\_E](https://www.ruby-forum.com/u/Thomas_E)\
**Post date:** [May 1, 2009, 10:42pm UTC](https://www.ruby-forum.com/t/jruby-1-3-0rc1-released/167005/1 "2009-05-01T22:42:16Z")

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The JRuby community is pleased to announce the release of JRuby 1.3.0RC1

Homepage: [http://www.jruby.org/](http://www.jruby.org/)  
Download: [http://dist.codehaus.org/jruby/](http://dist.codehaus.org/jruby/)

JRuby 1.3.0RC1 is a release to fix some issues which prevented JRuby  
from  
working with Google App Engine (GAE/J). We decided to put out a shorter  
release so that users interested in GAE/J could get going without  
needing to  
build JRuby from scratch.

**Please try your apps against 1.3.0RC1 ASAP and report problems**

Highlights:

- Fixes so that JRuby runs in restricted environments better like GAE/J
- Accessing primitive Java arrays are about 10x faster
- timeout.rb is now ~40% faster
- irb works in --1.9 mode now
  - Additional Miscellaneous 1.9 fixes

- rubygems 1.3.2 and rspec 1.2.6 upgrades
- 22 bugs fixed since 1.2.0

Key Summary  
JRUBY-3566 bug in multiplication  
JRUBY-1401 Pathname#realpath fails for Windows drive letters  
JRUBY-3490 Object#instance\_exec only works with blocks of 3  
parameters or less?!  
JRUBY-3423 When using ActiveSupport, YAML dump/load of 3.0 returns  
YAML::PrivateType  
JRUBY-3517 Incorrect self in a multiple assignment  
JRUBY-3514 RUBY\_PATCHLEVEL should be a Fixnum instead of String  
JRUBY-3533 YAML.load fails on Base64 encoded binary data created by  
yaml “Length of Base64 encoded input string is not a multiple of 4.”  
JRUBY-3516 Non-thread safe regex backrefs  
JRUBY-2289 File.directory? returns false for directories inside a  
jar  
JRUBY-3551 ConcurrentModificationException in  
RubyClass.invalidateCacheDescendants()  
JRUBY-3564 UDPSocket#bind should interpret the empty string as  
INADDR\_ANY, not loopback  
JRUBY-3563 getsockname and getpeername should return a struct  
sockaddr  
JRUBY-3511 1.2.0: jruby --1.9 picks up the wrong path for loading  
modules  
JRUBY-3166 Primitive type not being boxed when implementing a Java  
interface.  
JRUBY-3568 Threads don’t appear to inherit the thread group of their  
creating thread  
JRUBY-3599 loop does not rescue StopIteration in --1.9  
JRUBY-3610 StringIO#read given a buffer raises ArrayIndex error  
JRUBY-3488 trap does not handle string as second argument  
JRUBY-3481 JRuby test: test\_command\_line\_switches.rb fails on Oracle  
JRockit JVM  
JRUBY-3537 FFI: initialize() is not called for Struct and  
ManagedStruct instances  
JRUBY-3565 TCPServer should bind to INADDR\_ANY given empty string as  
hostname  
JRUBY-3461 Minor code conventions documentation typo