Traceback (most recent call last):


 "/usr/local/lib/python3.6/dist-packages/horovod-0.19.2-py3.6-linux-x86_64.egg/horovod/run/common/util/tiny_shell_exec.py", line 33, in execute

exit_code = safe_shell_exec.execute(command, stdout=output, stderr=output)


 "/usr/local/lib/python3.6/dist-packages/horovod-0.19.2-py3.6-linux-x86_64.egg/horovod/run/common/util/safe_shell_exec.py", line 175, in execute

middleman.start()


 "/usr/lib/python3.6/multiprocessing/process.py", line 105, in start

self._popen = self._Popen(self)


 "/usr/lib/python3.6/multiprocessing/context.py", line 284, in _Popen

return Popen(process_obj)


 "/usr/lib/python3.6/multiprocessing/popen_spawn_posix.py", line 32, in __init__

super().__init__(process_obj)


 "/usr/lib/python3.6/multiprocessing/popen_fork.py", line 19, in __init__

self._launch(process_obj)


 "/usr/lib/python3.6/multiprocessing/popen_spawn_posix.py", line 42, in _launch

prep_data = spawn.get_preparation_data(process_obj._name)


 "/usr/lib/python3.6/multiprocessing/spawn.py", line 172, in get_preparation_data

main_mod_name = getattr(main_module.__spec__, "name", None)
AttributeError: module '__main__' has no attribute '__spec__'


Traceback (most recent call last):


 "~/miniconda3/envs/benchmark/lib/python3.6/site-packages/asv/benchmark.py", line 1184, in main_run_server

main_run(run_args)


 "~/miniconda3/envs/benchmark/lib/python3.6/site-packages/asv/benchmark.py", line 1058, in main_run

result = benchmark.do_run()


 "~/miniconda3/envs/benchmark/lib/python3.6/site-packages/asv/benchmark.py", line 537, in do_run

return self.run(*self._current_params)


 "~/miniconda3/envs/benchmark/lib/python3.6/site-packages/asv/benchmark.py", line 631, in run

min_run_count=self.min_run_count)


 "~/miniconda3/envs/benchmark/lib/python3.6/site-packages/asv/benchmark.py", line 663, in benchmark_timing

timing = timer.timeit(number)


 "~/mdanalysis/benchmarks/env/80c5ba7efaa89366b97da3ced85c0c44/lib/python3.6/timeit.py", line 178, in timeit

timing = self.inner(it, self.timer)


 "<timeit-src>", line 6, in inner


 "~/miniconda3/envs/benchmark/lib/python3.6/site-packages/asv/benchmark.py", line 599, in <lambda>

func = lambda: self.func(*param)


 "~/mdanalysis/benchmarks/benchmarks/selections.py", line 76, in time_geometric_selections

MDAnalysis.core.flags['use_periodic_selections'] = periodic_selection[0]

AttributeError: module 'MDAnalysis.core' has no attribute 'flags'
