From 777be5328a8b43bc3bcd6f59178f8eb4cb7e2a69 Mon Sep 17 00:00:00 2001 From: Serhiy Storchaka Date: Mon, 20 Jul 2026 18:02:02 +0300 Subject: [PATCH] gh-154272: Skip forkserver tests when the start method is unavailable Co-Authored-By: Claude Opus 4.8 (1M context) --- Lib/test/test_concurrent_futures/util.py | 2 ++ Lib/test/test_multiprocessing_forkserver/__init__.py | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/Lib/test/test_concurrent_futures/util.py b/Lib/test/test_concurrent_futures/util.py index 006360c8d941c9d..9dc1d057e75b4bc 100644 --- a/Lib/test/test_concurrent_futures/util.py +++ b/Lib/test/test_concurrent_futures/util.py @@ -139,6 +139,8 @@ def get_context(self): self.skipTest("require unix system") if support.check_sanitizer(thread=True): self.skipTest("TSAN doesn't support threads after fork") + if "forkserver" not in multiprocessing.get_all_start_methods(): + self.skipTest("forkserver start method is not available") return super().get_context() def create_event(self): diff --git a/Lib/test/test_multiprocessing_forkserver/__init__.py b/Lib/test/test_multiprocessing_forkserver/__init__.py index c58375e2861c62e..600285cbf613003 100644 --- a/Lib/test/test_multiprocessing_forkserver/__init__.py +++ b/Lib/test/test_multiprocessing_forkserver/__init__.py @@ -1,3 +1,4 @@ +import multiprocessing import os.path import sys import unittest @@ -12,5 +13,10 @@ if not support.has_fork_support: raise unittest.SkipTest("requires working os.fork()") +# The forkserver start method requires passing file descriptors over a Unix +# socket, which is not available on every platform (e.g. Solaris/illumos). +if "forkserver" not in multiprocessing.get_all_start_methods(): + raise unittest.SkipTest("forkserver start method is not available") + def load_tests(*args): return support.load_package_tests(os.path.dirname(__file__), *args)