test_multiprocessing_forkserver: ProcessLookupError: [Errno 3] No such process

[furkanonder]

Bug report

Bug description:

The problem is seen in a buildbot.

Configuration:

./configure --prefix '$(PWD)/target'

Tests:

./target/bin/python3.12 -Wdefault -bb -E -m test -rwW -uall -j2 --timeout=2400 -j4

Output:

======================================================================
ERROR: test_ignore (test.test_multiprocessing_forkserver.test_misc.TestIgnoreEINTR.test_ignore)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dietpi/buildarea/3.12.onder-riscv64.installed/build/target/lib/python3.12/test/_test_multiprocessing.py", line 5355, in test_ignore
    os.kill(p.pid, signal.SIGUSR1)
ProcessLookupError: [Errno 3] No such process
----------------------------------------------------------------------
Ran 63 tests in 45.014s
FAILED (errors=1, skipped=5)
test test.test_multiprocessing_forkserver.test_misc failed

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux