'test_select_symbol' test fails for activerecord

  1) Failure:
test_select_symbol(BasicsTest)
    [./test/cases/base_test.rb:53:in `test_select_symbol'
     /home/anil/code/rails/rails/activesupport/lib/active_support/testing/setup_and_teardown.rb:67:in `run'
     /home/anil/code/rails/rails/activesupport/lib/active_support/callbacks.rb:428:in `_run_setup_callbacks'
     /home/anil/code/rails/rails/activesupport/lib/active_support/testing/setup_and_teardown.rb:65:in `run']:
<[1, 2, 3, 4]> expected but was
<[0, 0, 0, 0]>.

2415 tests, 7483 assertions, 1 failures, 0 errors
rake aborted!
Command failed with status (1): [/home/anil/.rvm/rubies/jruby-head/bin/jrub...]

I am using jruby-head

ruby --version
jruby 1.6.0.dev (ruby 1.8.7 patchlevel 249) (2010-10-14 339a318) (Java HotSpot(TM) Client VM 1.6.0_21) [linux-i386-java]