`ThreadLocalVar` test fails on Rbx

[jdantonio]

Since merging the latest updates to ThreadLocalVar we have one test that always fails on Rbx:

Failures:
  1) Concurrent::ThreadLocalVar GC does not leave values behind when bind is not used
     Failure/Error: expect(tries.any?).to be_truthy
       expected: truthy value
            got: false
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-expectations-3.0.4/lib/rspec/expectations/fail_with.rb:30:in `fail_with'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-expectations-3.0.4/lib/rspec/expectations/handler.rb:37:in `handle_failure'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-expectations-3.0.4/lib/rspec/expectations/handler.rb:48:in `handle_matcher'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-expectations-3.0.4/lib/rspec/expectations/expectation_target.rb:54:in `to'
     # ./spec/concurrent/atomic/thread_local_var_spec.rb:64:in `__script__'
     # kernel/common/eval.rb:101:in `instance_exec'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/example.rb:148:in `run'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/example.rb:301:in `with_around_example_hooks'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/example.rb:145:in `run'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/example_group.rb:494:in `run_examples'
     # kernel/bootstrap/array.rb:97:in `map'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/example_group.rb:490:in `run_examples'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/example_group.rb:457:in `run'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/example_group.rb:458:in `run'
     # kernel/bootstrap/array.rb:97:in `map'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/example_group.rb:458:in `run'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/runner.rb:112:in `run_specs'
     # kernel/bootstrap/array.rb:97:in `map'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/runner.rb:112:in `run_specs'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/reporter.rb:54:in `report'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/runner.rb:108:in `run_specs'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/runner.rb:86:in `run'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/runner.rb:70:in `run'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/lib/rspec/core/runner.rb:38:in `invoke'
     # /home/travis/.rvm/gems/rbx-2.4.1/gems/rspec-core-3.0.4/exe/rspec:4:in `__script__'
     # kernel/common/kernel.rb:497:in `load'
     # /home/travis/.rvm/gems/rbx-2.4.1/bin/rspec:23:in `__script__'
     # kernel/common/block_environment.rb:53:in `call_on_instance'
     # kernel/common/eval.rb:176:in `eval'
     # /home/travis/.rvm/gems/rbx-2.4.1/bin/ruby_executable_hooks:15:in `__script__'
     # kernel/delta/code_loader.rb:66:in `load_script'
     # kernel/delta/code_loader.rb:152:in `load_script'
     # kernel/loader.rb:645:in `script'
     # kernel/loader.rb:799:in `main'
Finished in 3 minutes 24.9 seconds (files took 14.54 seconds to load)
1369 examples, 1 failure, 2 pending
Failed examples:
rspec ./spec/concurrent/atomic/thread_local_var_spec.rb:54 # Concurrent::ThreadLocalVar GC does not leave values behind when bind is not used

[pitr-ch]

Ah right you cannot assign two people. Anyway @jdantonio are you already looking into this?

[jdantonio]

@pitr-ch Started to, then realized I have no good ideas for fixing it. The PR I created simply excludes the test. If you have other ideas please step in.