/usr/local/lib/python2.7/dist-packages/numdifftools/limits.py:182: FutureWarning: arrays to stack must be passed as a "sequence" type such as list or tuple. Support for non-sequence iterables such as generators is deprecated as of NumPy 1.16 and will raise an error in the future.
  f_del = np.vstack(list(np.ravel(r)) for r in sequence)
/usr/local/lib/python2.7/dist-packages/numdifftools/limits.py:184: FutureWarning: arrays to stack must be passed as a "sequence" type such as list or tuple. Support for non-sequence iterables such as generators is deprecated as of NumPy 1.16 and will raise an error in the future.
  for step in steps)
python: malloc.c:3843: _int_malloc: Assertion `chunk_main_arena (fwd)' failed.
Command terminated by signal 6

{"usertime":370.88,"memmax":89112,"memavg":0}