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test_import_in_subinterpreter_before_main Failed: Subprocess failed with exit code 1. Code: ```python def test(): import sys sys.path.insert(0, '/home/runner/work/pybind11/pybind11/build/tests') import collections import mod_per_interpreter_gil_with_singleton as m objects = m.get_objects_in_singleton() expected = [ type(None), tuple, list, dict, collections.OrderedDict, collections.defaultdict, collections.deque, ] assert objects == expected, f"Expected {expected!r}, got {objects!r}." assert hasattr(m, 'MyClass'), "Module missing MyClass" assert hasattr(m, 'MyGlobalError'), "Module missing MyGlobalError" assert hasattr(m, 'MyLocalError'), "Module missing MyLocalError" assert hasattr(m, 'MyEnum'), "Module missing MyEnum" import contextlib import gc from concurrent import interpreters interps = interp = None with contextlib.ExitStack() as stack: interps = [ stack.enter_context(contextlib.closing(interpreters.create())) for _ in range(8) ] for interp in interps: interp.call(test) test() del interps, interp, stack for _ in range(5): gc.collect() ``` Output: Traceback (most recent call last): File "<string>", line 39, in <module> test() ~~~~^^ File "<string>", line 7, in test import mod_per_interpreter_gil_with_singleton as m ImportError: generic_type: type "MyClass" is already registered!

test_import_module_with_singleton_per_interpreter concurrent.interpreters.ExecutionFailed: ImportError: pybind11::native_enum<...>("MyEnum") is already registered as a `pybind11::enum_` or `pybind11::class_`! Uncaught in the interpreter: Traceback (most recent call last): File "<script>", line 26, in <module> File "<script>", line 7, in test ImportError: pybind11::native_enum<...>("MyEnum") is already registered as a `pybind11::enum_` or `pybind11::class_`!

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test_import_in_subinterpreter_concurrently Failed: Subprocess failed with exit code 1. Code: ```python def test(): import sys sys.path.insert(0, '/home/runner/work/pybind11/pybind11/build/tests') import collections import mod_per_interpreter_gil_with_singleton as m objects = m.get_objects_in_singleton() expected = [ type(None), tuple, list, dict, collections.OrderedDict, collections.defaultdict, collections.deque, ] assert objects == expected, f"Expected {expected!r}, got {objects!r}." assert hasattr(m, 'MyClass'), "Module missing MyClass" assert hasattr(m, 'MyGlobalError'), "Module missing MyGlobalError" assert hasattr(m, 'MyLocalError'), "Module missing MyLocalError" assert hasattr(m, 'MyEnum'), "Module missing MyEnum" import gc from concurrent.futures import InterpreterPoolExecutor, as_completed futures = future = None with InterpreterPoolExecutor(max_workers=16) as executor: futures = [executor.submit(test) for _ in range(32)] for future in as_completed(futures): future.result() del futures, future, executor for _ in range(5): gc.collect() ``` Output: Traceback (most recent call last): File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/futures/interpreter.py", line 84, in run return self.interp.call(do_call, self.results, *task) ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/interpreters/__init__.py", line 238, in call return self._call(callable, args, kwargs) ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/interpreters/__init__.py", line 222, in _call raise ExecutionFailed(excinfo) concurrent.interpreters.ExecutionFailed: ImportError: generic_type: type "MyClass" is already registered! Uncaught in the interpreter: Traceback (most recent call last): File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/futures/interpreter.py", line 11, in do_call return func(*args, **kwargs) File "<string>", line 7, in test ImportError: generic_type: type "MyClass" is already registered! The above exception was the direct cause of the following exception: Traceback (most recent call last): File "<string>", line 33, in <module> future.result() ~~~~~~~~~~~~~^^ File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/futures/_base.py", line 443, in result return self.__get_result() ~~~~~~~~~~~~~~~~~^^ File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/futures/_base.py", line 395, in __get_result raise self._exception File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/futures/thread.py", line 86, in run result = ctx.run(self.task) File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/futures/interpreter.py", line 91, in run raise exc from wrapper ImportError: generic_type: type "MyClass" is already registered!

test_import_in_subinterpreter_before_main Failed: Subprocess failed with exit code 1. Code: ```python def test(): import sys sys.path.insert(0, '/home/runner/work/pybind11/pybind11/build/tests') import collections import mod_per_interpreter_gil_with_singleton as m objects = m.get_objects_in_singleton() expected = [ type(None), tuple, list, dict, collections.OrderedDict, collections.defaultdict, collections.deque, ] assert objects == expected, f"Expected {expected!r}, got {objects!r}." assert hasattr(m, 'MyClass'), "Module missing MyClass" assert hasattr(m, 'MyGlobalError'), "Module missing MyGlobalError" assert hasattr(m, 'MyLocalError'), "Module missing MyLocalError" assert hasattr(m, 'MyEnum'), "Module missing MyEnum" import contextlib import gc from concurrent import interpreters interp = None with contextlib.closing(interpreters.create()) as interp: interp.call(test) test() del interp for _ in range(5): gc.collect() ``` Output: Traceback (most recent call last): File "<string>", line 34, in <module> test() ~~~~^^ File "<string>", line 19, in test assert objects == expected, f"Expected {expected!r}, got {objects!r}." ^^^^^^^^^^^^^^^^^^^ AssertionError: Expected [<class 'NoneType'>, <class 'tuple'>, <class 'list'>, <class 'dict'>, <class 'collections.OrderedDict'>, <class 'collections.defaultdict'>, <class 'collections.deque'>], got [].

test_import_in_subinterpreter_after_main Failed: Subprocess failed with exit code 1. Code: ```python def test(): import sys sys.path.insert(0, '/home/runner/work/pybind11/pybind11/build/tests') import collections import mod_per_interpreter_gil_with_singleton as m objects = m.get_objects_in_singleton() expected = [ type(None), tuple, list, dict, collections.OrderedDict, collections.defaultdict, collections.deque, ] assert objects == expected, f"Expected {expected!r}, got {objects!r}." assert hasattr(m, 'MyClass'), "Module missing MyClass" assert hasattr(m, 'MyGlobalError'), "Module missing MyGlobalError" assert hasattr(m, 'MyLocalError'), "Module missing MyLocalError" assert hasattr(m, 'MyEnum'), "Module missing MyEnum" import contextlib import gc from concurrent import interpreters test() interp = None with contextlib.closing(interpreters.create()) as interp: interp.call(test) del interp for _ in range(5): gc.collect() ``` Output: Traceback (most recent call last): File "<string>", line 34, in <module> interp.call(test) ~~~~~~~~~~~^^^^^^ File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/interpreters/__init__.py", line 238, in call return self._call(callable, args, kwargs) ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/concurrent/interpreters/__init__.py", line 222, in _call raise ExecutionFailed(excinfo) concurrent.interpreters.ExecutionFailed: ImportError: generic_type: type "MyClass" is already registered! Uncaught in the interpreter: Traceback (most recent call last): File "<string>", line 7, in test ImportError: generic_type: type "MyClass" is already registered!

test_import_module_with_singleton_per_interpreter concurrent.interpreters.ExecutionFailed: ImportError: pybind11::native_enum<...>("MyEnum") is already registered as a `pybind11::enum_` or `pybind11::class_`! Uncaught in the interpreter: Traceback (most recent call last): File "<script>", line 26, in <module> File "<script>", line 7, in test ImportError: pybind11::native_enum<...>("MyEnum") is already registered as a `pybind11::enum_` or `pybind11::class_`!

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The distutils.sysconfig module is deprecated, use sysconfig instead