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Refreshing rake tasks via "Run/Debug Rake Task..." causes an error after installing rake-0.8.2 (on Mac OS X via 'sudo gem update rake'). This error occurs when the project is loaded as well. Error dialog contains this text: --- Rake tasks fetching failed with (working directory: ...): /Applications/NetBeans/NetBeans 6.5 Beta.app/Contents/Resources/NetBeans/ruby2/rake_tasks_info.rb:9: undefined method `do_option' for #<Rake::Application:0x513024> (NoMethodError) --- Can workaround by reverting back to rake-0.8.1 via 'sudo gem uninstall -v 0.8.2 rake'. Product Version: NetBeans IDE 6.5 Beta (Build 200808111757) Java: 1.5.0_13; Java HotSpot(TM) Client VM 1.5.0_13-119 System: Mac OS X version 10.5.4 running on i386; MacRoman; en_US (nb)
This was fixed five days ago. See the dupe. New build are available: http://wiki.netbeans.org/RubyInstallation#section-RubyInstallation-HowDoIGetTheContinuousBuilds *** This issue has been marked as a duplicate of 147043 ***