def _process_queue(self):
        with stack_context.NullContext():
            while True:
                started = 0
                while self._free_list and self._requests:
                    started += 1
                    curl = self._free_list.pop()
                    (request, callback) = self._requests.popleft()
                    curl.info = {
                        "headers": httputil.HTTPHeaders(),
                        "buffer": BytesIO(),
                        "request": request,
                        "callback": callback,
                        "curl_start_time": time.time(),
                    }
                    # Disable IPv6 to mitigate the effects of this bug
                    # on curl versions <= 7.21.0
                    # http://sourceforge.net/tracker/?func=detail&aid=3017819&group_id=976&atid=100976
                    if 0x71500 <= pycurl.version_info()[2]:  # 7.21.0
                        curl.setopt(pycurl.IPRESOLVE, pycurl.IPRESOLVE_V4)
                    _curl_setup_request(curl, request, curl.info["buffer"],
                                        curl.info["headers"])
                    self._multi.add_handle(curl)

                if not started:
                    break
dataset/ETHPy150Open D-L/SimpleBookMarks/src/tornado/curl_httpclient.py/CurlAsyncHTTPClient._process_queue/swapped operands of `<=`