ruby/spec errors when preventing writing to thread/fiber-local variables from another Thread

gistfile1.txt

1)
Thread#thread_variable_get returns the value previously set by #[]= ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_get_spec.rb:17:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_get_spec.rb:17:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_get_spec.rb:3:in `<top (required)>'

2)
Thread#thread_variable_get returns a value private to self ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_get_spec.rb:22:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_get_spec.rb:22:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_get_spec.rb:3:in `<top (required)>'

3)
Thread#thread_variable_set returns the value set ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_set_spec.rb:13:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_set_spec.rb:13:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_set_spec.rb:3:in `<top (required)>'

4)
Thread#thread_variable_set sets a value that will be returned by #thread_variable_get ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_set_spec.rb:17:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_set_spec.rb:17:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_set_spec.rb:3:in `<top (required)>'

5)
Thread#thread_variable_set sets a value private to self ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_set_spec.rb:22:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_set_spec.rb:22:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_set_spec.rb:3:in `<top (required)>'

6)
ObjectSpace.each_object finds an object stored in a thread local ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/objectspace/each_object_spec.rb:134:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/objectspace/each_object_spec.rb:134:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/objectspace/each_object_spec.rb:4:in `<top (required)>'

7)
Thread#keys stores a local in another thread when in a fiber ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/keys_spec.rb:38:in `[]='
/home/eregon/code/ruby/spec/rubyspec/core/thread/keys_spec.rb:38:in `block (3 levels) in <top (required)>'

8)
Process.detach sets the :pid thread-local to the PID FAILED
Expected nil
 to equal 6451

/home/eregon/code/ruby/spec/rubyspec/core/process/detach_spec.rb:35:in `block (3 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/process/detach_spec.rb:3:in `<top (required)>'

9)
Thread#thread_variable? returns false if the thread variables do not contain 'key' ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_spec.rb:13:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_spec.rb:13:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_spec.rb:3:in `<top (required)>'

10)
Thread#thread_variable? returns true if the thread variables contain 'key' ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_spec.rb:18:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_spec.rb:18:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variable_spec.rb:3:in `<top (required)>'

11)
Thread#thread_variables returns the keys of all the values set ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variables_spec.rb:13:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variables_spec.rb:13:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variables_spec.rb:3:in `<top (required)>'

12)
Thread#thread_variables sets a value private to self ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variables_spec.rb:20:in `thread_variable_set'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variables_spec.rb:20:in `block (2 levels) in <top (required)>'
/home/eregon/code/ruby/spec/rubyspec/core/thread/thread_variables_spec.rb:3:in `<top (required)>'

13)
Thread#[]= stores a local in another thread when in a fiber ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/element_set_spec.rb:46:in `[]='
/home/eregon/code/ruby/spec/rubyspec/core/thread/element_set_spec.rb:46:in `block (3 levels) in <top (required)>'

14)
Thread#key? stores a local in another thread when in a fiber ERROR
ThreadError: inter-thread access of TLS prohibited
/home/eregon/code/ruby/spec/rubyspec/core/thread/key_spec.rb:47:in `[]='
/home/eregon/code/ruby/spec/rubyspec/core/thread/key_spec.rb:47:in `block (3 levels) in <top (required)>'