I&#39;ve just installed the latest MacRuby beta binaries on my new macbook, and this happens:<div><br></div><div><div>Jeremy-Voorhiss-MacBook-Pro:~ jvoorhis$ cat test.rb </div><div>require &#39;hotcocoa&#39;</div><div>include HotCocoa</div>
<div>application do |app|</div><div>  win = window :size =&gt; [100,50]</div><div>  b = button :title =&gt; &#39;Hello&#39;</div><div>  b.on_action { puts &#39;World!&#39; }</div><div>  win &lt;&lt; b</div><div>end</div><div>
Jeremy-Voorhiss-MacBook-Pro:~ jvoorhis$ macruby --version</div><div>MacRuby version 0.5 (ruby 1.9.0) [universal-darwin10.0, x86_64]</div><div>Jeremy-Voorhiss-MacBook-Pro:~ jvoorhis$ macruby test.rb </div><div>2009-12-18 22:06:45.181 macruby[76926:903] *** -[NSLock unlock]: lock (&lt;NSLock: 0x2000a9600&gt; &#39;(null)&#39;) unlocked when not locked</div>
<div>2009-12-18 22:06:45.184 macruby[76926:903] *** Break on _NSLockError() to debug.</div><div>/Library/Frameworks/MacRuby.framework/Versions/0.5/usr/lib/ruby/1.9.0/hotcocoa/mappings/application.rb:9:in `handle_block:&#39;: undefined method `on_action&#39; for 0:NSButton (NoMethodError)</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>from core:in `application:&#39;</div><div><span class="Apple-tab-span" style="white-space:pre">	</span>from test.rb:2:in `&lt;main&gt;&#39;</div><div><br></div>
<div>I&#39;ve hardly used HotCocoa at all. This might have already been covered in some other thread that I wasn&#39;t paying attention to. If not, I can file something in trac.</div><div><br></div><div>Thanks,</div><div>
<br></div><div>Jeremy</div></div>