I'm actually trying to install another plugin (pathignore) that is dependent on the ruby-runtime plugin, and I keep receiving an exception when trying to install ruby-runtime (0.6).

This happens on Windows 7 64-bit, running Jenkins as a service. This is reproducible on Jenkins version 1.443 and 1.442. The issue does not happen on my Jenkins instance that is running on Ubuntu Server 10.4, so it appears to be something related to Windows.

The exception that occurs is the following:

jenkins.InitReactorRunner$1 onTaskFailed
SEVERE: Failed Loading plugin ruby-runtime
hudson.util.IOException2: Failed to initialize
at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:335)
at hudson.PluginManager$2$1$1.run(PluginManager.java:294)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
at jenkins.model.Jenkins$5.runTask(Jenkins.java:804)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.jruby.embed.EvalFailedException: (LoadError) no such file to load – haml
at org.jruby.embed.internal.EmbedEvalUnitImpl.run(EmbedEvalUnitImpl.java:127)
at org.jruby.embed.ScriptingContainer.runUnit(ScriptingContainer.java:1231)
at org.jruby.embed.ScriptingContainer.runScriptlet(ScriptingContainer.java:1224)
at org.kohsuke.stapler.jelly.jruby.haml.HamlLanguage.createContainer(HamlLanguage.java:28)
at org.kohsuke.stapler.jelly.jruby.JRubyFacet.<init>(JRubyFacet.java:69)
at ruby.RubyRuntimePlugin.registerJRubyFacet(RubyRuntimePlugin.java:38)
at ruby.RubyRuntimePlugin.start(RubyRuntimePlugin.java:29)
at hudson.ClassicPluginStrategy.startPlugin(ClassicPluginStrategy.java:343)
at hudson.ClassicPluginStrategy.load(ClassicPluginStrategy.java:332)
... 9 more
Caused by: org.jruby.exceptions.RaiseException: (LoadError) no such file to load – haml

If there's any additional debug information I can add, I'll be glad to attach that information.