Issue #1545463: Global variables caught in reference cycles are now garbage-collected at shutdown.
diff --git a/Lib/test/test_gc.py b/Lib/test/test_gc.py
index 85dbc97..6b52e5a 100644
--- a/Lib/test/test_gc.py
+++ b/Lib/test/test_gc.py
@@ -1,6 +1,8 @@
import unittest
from test.support import (verbose, refcount_test, run_unittest,
strip_python_stderr)
+from test.script_helper import assert_python_ok, make_script, temp_dir
+
import sys
import time
import gc
@@ -610,6 +612,40 @@
stderr = run_command(code % "gc.DEBUG_SAVEALL")
self.assertNotIn(b"uncollectable objects at shutdown", stderr)
+ def test_gc_main_module_at_shutdown(self):
+ # Create a reference cycle through the __main__ module and check
+ # it gets collected at interpreter shutdown.
+ code = """if 1:
+ import weakref
+ class C:
+ def __del__(self):
+ print('__del__ called')
+ l = [C()]
+ l.append(l)
+ """
+ rc, out, err = assert_python_ok('-c', code)
+ self.assertEqual(out.strip(), b'__del__ called')
+
+ def test_gc_ordinary_module_at_shutdown(self):
+ # Same as above, but with a non-__main__ module.
+ with temp_dir() as script_dir:
+ module = """if 1:
+ import weakref
+ class C:
+ def __del__(self):
+ print('__del__ called')
+ l = [C()]
+ l.append(l)
+ """
+ code = """if 1:
+ import sys
+ sys.path.insert(0, %r)
+ import gctest
+ """ % (script_dir,)
+ make_script(script_dir, 'gctest', module)
+ rc, out, err = assert_python_ok('-c', code)
+ self.assertEqual(out.strip(), b'__del__ called')
+
def test_get_stats(self):
stats = gc.get_stats()
self.assertEqual(len(stats), 3)