Block argument handling is inconsistent in 1.9 mode

Handling of passed in block params in --1.9 mode is different from MRI Ruby. In 1.8 (default) mode the behavior is as expected, but 1.9 is inconsistent (tested with jruby-head, same behavior). Example:

<pre>
blk = Proc.new

blk.call(1,2,3)
blk.call([1,2,3])

igrigorik

> ruby test.rb
[:block_args, 1, [2, 3]]
[:block_args, 1, [2, 3]]

igrigorik

> jruby --1.9 test.rb
[:block_args, 1, [2, 3]]
[:block_args, [1, 2, 3], []] <<<<<<<<<<<<<<<<<<<<<<< Hmmm?

igrigorik

> jruby test.rb
[:block_args, 1, [2, 3]]
[:block_args, 1, [2, 3]]
</pre>