jruby closure decompiled

Its quite interesting to look into the compiled class file generated by JRuby. Following is the sample java code generated for a closure (1.times { puts 'in closure' }) .

private static ByteList __18 = ByteList.create("in closure");
.....
.....
public IRubyObject closure0(ThreadContext threadcontext, IRubyObject irubyobject, IRubyObject airubyobject[])
{
Ruby ruby;
IRubyObject irubyobject1 = (ruby = threadcontext.getRuntime()).getNil();
DynamicScope dynamicscope = threadcontext.getCurrentScope();
IRubyObject _tmp = irubyobject1;
do
{
try
{
threadcontext.setPosition(__15);
return _17.call(threadcontext, irubyobject, RuntimeHelpers.constructObjectArray(ruby.newStringShared(__18)));
}
catch(org.jruby.exceptions.JumpException.RedoJump _ex) { }
} while(true);
}

RedoJump exception is used to simulate ruby redo