[2018/06/18 12:13:04.141] + /opt/python/pypy3/bin/pypy3 -c 'import sys; print(sys.version)'
 [2018/06/18 12:13:04.140] 3.2.5 (b2091e973da69152b3f928bfaabd5d2347e6df46, Oct 24 2014, 12:08:04)
 [2018/06/18 12:13:04.140] [PyPy 2.4.0 with GCC 4.8.2]
....
 [2018/06/18 12:14:59.745] ERROR [0.141s]: test_alt_collection (test_gridfs.TestGridfs)
 [2018/06/18 12:14:59.745] ----------------------------------------------------------------------
 [2018/06/18 12:14:59.745] Traceback (most recent call last):
 [2018/06/18 12:14:59.745]   File "/data/mci/538b97133808052c3200dffc12869fc9/src/test/test_gridfs.py", line 208, in test_alt_collection
 [2018/06/18 12:14:59.745]     self.alt.put(b"foo", filename="test")
 [2018/06/18 12:14:59.745]   File "gridfs/__init__.py", line 129, in put
 [2018/06/18 12:14:59.745]     grid_file.close()
 [2018/06/18 12:14:59.746]   File "gridfs/grid_file.py", line 311, in close
 [2018/06/18 12:14:59.746]     self.__flush()
 [2018/06/18 12:14:59.746]   File "gridfs/grid_file.py", line 288, in __flush
 [2018/06/18 12:14:59.746]     self.__flush_buffer()
 [2018/06/18 12:14:59.746]   File "gridfs/grid_file.py", line 280, in __flush_buffer
 [2018/06/18 12:14:59.746]     self.__flush_data(self._buffer.getvalue())
 [2018/06/18 12:14:59.746]   File "gridfs/grid_file.py", line 258, in __flush_data
 [2018/06/18 12:14:59.746]     self.__ensure_indexes()
 [2018/06/18 12:14:59.746]   File "gridfs/grid_file.py", line 202, in __ensure_indexes
 [2018/06/18 12:14:59.746]     self.__create_index(self._coll.chunks, _C_INDEX, True)
 [2018/06/18 12:14:59.746]   File "gridfs/grid_file.py", line 188, in __create_index
 [2018/06/18 12:14:59.746]     doc = collection.find_one(projection={"_id": 1}, session=self._session)
 [2018/06/18 12:14:59.746]   File "/data/mci/538b97133808052c3200dffc12869fc9/src/pymongo/collection.py", line 1240, in find_one
 [2018/06/18 12:14:59.746]     for result in cursor.limit(-1):
 [2018/06/18 12:14:59.746]   File "/data/mci/538b97133808052c3200dffc12869fc9/src/pymongo/cursor.py", line 1184, in next
 [2018/06/18 12:14:59.746]     if len(self.__data) or self._refresh():
 [2018/06/18 12:14:59.746]   File "/data/mci/538b97133808052c3200dffc12869fc9/src/pymongo/cursor.py", line 1099, in _refresh
 [2018/06/18 12:14:59.746]     self.__send_message(q)
 [2018/06/18 12:14:59.746]   File "/data/mci/538b97133808052c3200dffc12869fc9/src/pymongo/cursor.py", line 924, in __send_message
 [2018/06/18 12:14:59.746]     start = datetime.datetime.now()
 [2018/06/18 12:14:59.746]   File "/opt/python/pypy3/lib-python/3/datetime.py", line 1428, in now
 [2018/06/18 12:14:59.746]     return cls.fromtimestamp(t, tz)
 [2018/06/18 12:14:59.746]   File "/opt/python/pypy3/lib-python/3/datetime.py", line 1391, in fromtimestamp
 [2018/06/18 12:14:59.746]     us = _round(frac * 1e6)
 [2018/06/18 12:14:59.746]   File "/opt/python/pypy3/lib-python/3/datetime.py", line 27, in _round
 [2018/06/18 12:14:59.746]     return _math.floor(x + 0.5) if x >= 0.0 else _math.ceil(x - 0.5)
 [2018/06/18 12:14:59.746] ValueError: cannot convert float NaN to integer