diff options
Diffstat (limited to 'Lib/test/test_imp.py')
| -rw-r--r-- | Lib/test/test_imp.py | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Lib/test/test_imp.py b/Lib/test/test_imp.py index 446e913..80abc72 100644 --- a/Lib/test/test_imp.py +++ b/Lib/test/test_imp.py @@ -1,3 +1,4 @@ +import gc import importlib import importlib.util import os @@ -413,6 +414,35 @@ class ImportTests(unittest.TestCase): bltin = create_builtin(spec) self.assertEqual(bltin, builtins) + @support.cpython_only + def test_create_builtin_subinterp(self): + # gh-99578: create_builtin() behavior changes after the creation of the + # first sub-interpreter. Test both code paths, before and after the + # creation of a sub-interpreter. Previously, create_builtin() had + # a reference leak after the creation of the first sub-interpreter. + + import builtins + create_builtin = support.get_attribute(_imp, "create_builtin") + class Spec: + name = "builtins" + spec = Spec() + + def check_get_builtins(): + refcnt = sys.getrefcount(builtins) + mod = _imp.create_builtin(spec) + self.assertIs(mod, builtins) + self.assertEqual(sys.getrefcount(builtins), refcnt + 1) + # Check that a GC collection doesn't crash + gc.collect() + + check_get_builtins() + + ret = support.run_in_subinterp("import builtins") + self.assertEqual(ret, 0) + + check_get_builtins() + + class ReloadTests(unittest.TestCase): """Very basic tests to make sure that imp.reload() operates just like |