Run the daemon thread test in a subprocess.

python · ZeroIntensity · May 22, 2025 · May 24, 2025 · May 24, 2025 · May 24, 2025
commit f85a291b5d70e8b25ac89342aff708c87fc95ba0
@@ -7,6 +7,7 @@

 from test import support
 from test.support import import_helper
+from test.support.script_helper import assert_python_ok
 # Raise SkipTest if subinterpreters not supported.
 _interpreters = import_helper.import_module('_interpreters')
 from test.support import Py_GIL_DISABLED
@@ -675,6 +676,13 @@ def task():
        self.assertEqual(os.read(r_interp, 1), FINISHED)

    def test_remaining_daemon_threads(self):
+        # Daemon threads leak reference by nature, because they hang threads
+        # without allowing them to do cleanup (i.e., release refs).
+        # To prevent that from messing up the refleak hunter and whatnot, we
+        # run this in a subprocess.
+        code = '''if True:
+        import _interpreters
+        import types
        interp = _interpreters.create(
            types.SimpleNamespace(
                use_main_obmalloc=False,
@@ -698,6 +706,8 @@ def task():
                t.start()
            """)
        _interpreters.destroy(interp)
+        '''
+        assert_python_ok('-c', code)


 class TestInterpreterPrepareMain(TestBase):