Ruby » Ruby master

merge revision(s) 49055: [Backport #10667]

    * thread.c (rb_thread_variable_get): fix dynamic symbol keys.
      rb_check_id() returns non-zero only for static symbols, whereas
      thread local variable keys can be dynamic symbols.
      [ruby-core:67185] [Bug #10667]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@49125 b2dd03c8-39d4-4d8f-98ff-823fe69b080e