JRuby Build Error

gistfile1.txt

jar-jruby-dist:
     [echo] jarjaring for dist
   [jarjar] Building jar: /Users/chriswhite/github/jruby/lib/jruby.jar

_osgify-jar_:
  [bndwrap] jruby 8315 0
     [move] Moving 1 file to /Users/chriswhite/github/jruby/lib

generate-ri-cache:

dist-src:
    [mkdir] Created dir: /Users/chriswhite/github/jruby/dist/jruby-src-1.7.0.dev
     [copy] Copying 1416 files to /Users/chriswhite/github/jruby/dist/jruby-src-1.7.0.dev
     [echo] Running rake install_dist_gems['dist/jruby-src-1.7.0.dev']
     [echo] compile=OFF, threshold=20, objectspace=true threadpool=false reflection=false
     [java] (in /Users/chriswhite/github/jruby)
     [java] rake aborted!
     [java] cannot load Java class org.jruby.org.objectweb.asm.TraceClassVisitor
     [java] 
     [java] (See full trace by running task with --trace)