[Linux] psutil.NoSuchProcess exception can't be pickled

[anthonyryan1]

Summary

• OS: Linux
• Architecture: 64bit
• Psutil version: 5.9.5
• Python version: 3.11.4
• Type: core, tests

Description

psutil.NoSuchProcess exceptions can't be pickled and sent through a pipe. Normally, one would expect python exceptions to be pickleable so they can be moved.

#!/bin/env python3
import multiprocessing
import psutil

# err = Exception("A standard exception works")
err = psutil.NoSuchProcess(pid=123)

recv_pipe, send_pipe = multiprocessing.Pipe(duplex=False)

send_pipe.send(err)

output = recv_pipe.recv()
# assert isinstance(output, Exception)
assert isinstance(output, psutil.NoSuchProcess)