Running jrubyc on a directory is failing with the following error:

TypeError: failed to coerce org.objectweb.asm.ClassWriter to org.jruby.org.objectweb.asm.ClassVisitor
block in compile_files_with_options at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/jruby/compiler.rb:179
call at org/jruby/RubyProc.java:303
block in compile_files_with_options at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/jruby/compiler.rb:243
each at org/jruby/RubyArray.java:1571
block in compile_files_with_options at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/jruby/compiler.rb:242
each at org/jruby/RubyArray.java:1571
compile_files_with_options at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/jruby/compiler.rb:233
compile_argv at uri:classloader:/META-INF/jruby.home/lib/ruby/stdlib/jruby/compiler.rb:94
at jrubyc.rb:3

It doesn't seem to matter which codebase we run it on, we're consistently getting this error. It's failing in both java 7 and 8.