[OS] iSH IndexError: list index out of range

[alitrack]

Platform

• { OS version }
  Alpine Linux v3.12 x86(iSH 1.0.1)
• { psutil version: python3 -c "import psutil; print(psutil.version)" }
  5.7.3
• { python version }
  3.8.5

Bug description
when run

import os
from psutil import Process
proc = Process(os.getpid())

gets,

Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/psutil/_common.py", line 446, in wrapper
    ret = self._cache[fun]
AttributeError: _cache

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.8/site-packages/psutil/__init__.py", line 324, in __init__
    self._init(pid)
  File "/usr/lib/python3.8/site-packages/psutil/__init__.py", line 352, in _init
    self.create_time()
  File "/usr/lib/python3.8/site-packages/psutil/__init__.py", line 708, in create_time
    self._create_time = self._proc.create_time()
  File "/usr/lib/python3.8/site-packages/psutil/_pslinux.py", line 1517, in wrapper
    return fun(self, *args, **kwargs)
  File "/usr/lib/python3.8/site-packages/psutil/_pslinux.py", line 1729, in create_time
    ctime = float(self._parse_stat_file()['create_time'])
  File "/usr/lib/python3.8/site-packages/psutil/_pslinux.py", line 1517, in wrapper
    return fun(self, *args, **kwargs)
  File "/usr/lib/python3.8/site-packages/psutil/_common.py", line 449, in wrapper
    return fun(self)
  File "/usr/lib/python3.8/site-packages/psutil/_pslinux.py", line 1578, in _parse_stat_file
    ret['cpu_num'] = fields[36]
IndexError: list index out of range

Test results
{ output of python -c psutil.tests (failures only, not full result) }

[giampaolo]

Mmmm please paste the output of cat /proc/self/stat.

[alitrack]

277 (cat) R 4 277 2 34816 277 0 0 0 0 0 0 0 0 0 20 0 1 0 0 0 0 0 0 0 4294958624 0 0 0 0 0 0 0 0 0 17

[giampaolo]

Your system has 38 fields, Linux Mint has 52. :-
I wonder why so many are missing.

[alitrack]

maybe need ask iSH for help.

[alitrack]

I checked alpine-standard-3.12.1-x86.iso, no this kind issue.

and iSH has another issue,

line 'btime' not found in /proc/stat

[giampaolo]

If this is the iSH you're referring to:
https://github.com/ish-app/ish
...then I have no idea, but it's not a platform officially supported.