ERROR: Data collection thread failed with exception: [Errno 12] Cannot allocate memory (originated from sysctl(KERN_PROC_ARGS))

[grahamperrin]

% cat /home/grahamperrin/.config/bpytop/error.log
16/09/23 (03:15:51) | ERROR: Data collection thread failed with exception: [Errno 12] Cannot allocate memory (originated from sysctl(KERN_PROC_ARGS))
Traceback (most recent call last):
  File "/usr/local/bin/bpytop", line 2958, in _runner
    collector._collect()
  File "/usr/local/bin/bpytop", line 3728, in _collect
    for p in sorted(psutil.process_iter(cls.p_values + (["memory_info"] if CONFIG.proc_mem_bytes else []), err), key=lambda p: eval(sort_cmd), reverse=reverse):
  File "/home/grahamperrin/.local/lib/python3.9/site-packages/psutil/__init__.py", line 1445, in process_iter
    yield add(pid)
  File "/home/grahamperrin/.local/lib/python3.9/site-packages/psutil/__init__.py", line 1426, in add
    proc.info = proc.as_dict(attrs=attrs, ad_value=ad_value)
  File "/home/grahamperrin/.local/lib/python3.9/site-packages/psutil/__init__.py", line 528, in as_dict
    ret = meth()
  File "/home/grahamperrin/.local/lib/python3.9/site-packages/psutil/__init__.py", line 686, in cmdline
    return self._proc.cmdline()
  File "/home/grahamperrin/.local/lib/python3.9/site-packages/psutil/_psbsd.py", line 566, in wrapper
    return fun(self, *args, **kwargs)
  File "/home/grahamperrin/.local/lib/python3.9/site-packages/psutil/_psbsd.py", line 684, in cmdline
    return cext.proc_cmdline(self.pid)
OSError: [Errno 12] Cannot allocate memory (originated from sysctl(KERN_PROC_ARGS))
16/09/23 (03:15:53) | WARNING: Exiting with errorcode (1). Runtime 0:03:34 

% 

Is this a bug? If so, should it be (a) an issue here or (b) a report in Bugzilla for FreeBSD?

Information about the port to FreeBSD: https://www.freshports.org/sysutils/bpytop/.

A screenshot from not long before the error (cropped, there was nothing significant on the display to the right at the time):