From 30ccdd514400cb1dde576530e14b2ff198cf171d Mon Sep 17 00:00:00 2001 From: Serhiy Storchaka Date: Wed, 22 Jul 2026 14:15:41 +0300 Subject: [PATCH] gh-154272: Skip forkserver tests when the start method is unavailable (GH-154274) Co-authored-by: Claude Opus 4.8 (1M context) (cherry picked from commit 13e3f8aa839d71285f3408241b0518da499eac39) --- 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 b12940414d9142d..842fdb0431ed18a 100644 --- a/Lib/test/test_concurrent_futures/util.py +++ b/Lib/test/test_concurrent_futures/util.py @@ -138,6 +138,8 @@ 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 d91715a344dfa7f..6bac9b7f9a97134 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 @@ -9,5 +10,10 @@ if sys.platform == "win32": raise unittest.SkipTest("forkserver is not available on Windows") +# 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)