mongo-ruby-driver against rbx-head-18mode

gistfile1.txt

Loaded suite /home/razielgn/.rvm/gems/rbx-head-d18@global/gems/rake-10.0.0/lib/rake/rake_test_loader
Started
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Finished in 71.137935 seconds.

269 tests, 3871 assertions, 0 failures, 0 errors, 0 pendings, 0 omissions, 0 notifications
100% passed

3.78 tests/s, 54.42 assertions/s
Loaded suite /home/razielgn/.rvm/gems/rbx-head-d18@global/gems/rake-10.0.0/lib/rake/rake_test_loader
Started
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Finished in 0.498773 seconds.

106 tests, 253 assertions, 0 failures, 0 errors, 0 pendings, 0 omissions, 0 notifications
100% passed

212.52 tests/s, 507.24 assertions/s
Loaded suite /home/razielgn/.rvm/gems/rbx-head-d18@global/gems/rake-10.0.0/lib/rake/rake_test_loader
Started
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===============================================================================
Failure:
test_generation_time(ObjectIdTest)
/home/razielgn/dev/repos/mongo-ruby-driver/test/bson/object_id_test.rb:106:in `test_generation_time'
     103:     generated_time = id.generation_time
     104: 
     105:     assert_in_delta time.to_i, generated_time.to_i, 2
  => 106:     assert_equal "UTC", generated_time.zone
     107:   end
     108: 
     109:   def test_from_time
/home/razielgn/.rvm/gems/rbx-head-d18/gems/mocha-0.12.7/lib/mocha/integration/test_unit/gem_version_230_to_252.rb:25:in `run'
<"UTC"> expected but was
<"GMT">

diff:
? U TC
? GM  
===============================================================================
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Finished in 0.554394 seconds.

135 tests, 295 assertions, 1 failures, 0 errors, 0 pendings, 0 omissions, 0 notifications
99.2593% passed

243.51 tests/s, 532.11 assertions/s
Loaded suite /home/razielgn/.rvm/gems/rbx-head-d18@global/gems/rake-10.0.0/lib/rake/rake_test_loader
Started
E
===============================================================================
Error: test_safe_insert(TestThreadingLargePool)
  NoMethodError: undefined method `%' on nil:NilClass.
kernel/delta/kernel.rb:81:in `% (method_missing)'
/home/razielgn/dev/repos/mongo-ruby-driver/test/threading/threading_with_large_pool_test.rb:50:in `test_safe_insert'
     47:     threads = []
     48:     300.times do |i|
     49:       threads[i] = Thread.new do
  => 50:         if i % 2 == 0
     51:           assert_raise Mongo::OperationFailure do
     52:             @unique.insert({"test" => "insert"}, :safe => true)
     53:           end
kernel/bootstrap/thread18.rb:56:in `__run__'
===============================================================================
..

Finished in 1.44267 seconds.

3 tests, 199 assertions, 0 failures, 1 errors, 0 pendings, 0 omissions, 0 notifications
66.6667% passed

2.08 tests/s, 137.94 assertions/s
[CLEAN-UP] Dropping test databases...