title: Latest xcb-proto and libxcb version on RHEL 7.0
body: <p>what is the latest version of xcb-proto and libxcb on RHEL 7.0?</p>
  
  <p>Till now we have explored that xcb-proto's latest version is 1.8 and libxcb's is 1.9. But we are still getting the following error in a multi-threaded program:</p>
  
  <p>java: xcb_conn.c:186: write_vec: Assertion `!c->out.queue_len' failed. </p>