test_interpreters Failing Intermittently Under Py_DISABLE_GIL #118731
Description
Bug report
Bug description:
On one of my recent PRs, gh-118157, I was getting consistent failures on CI in test_interpreters. Different tests would fail, but the error was always the same:
(expand)
0:08:24 load avg: 4.18 Re-running 1 failed tests in verbose mode in subprocesses
0:08:24 load avg: 4.18 Run 1 test in parallel using 1 worker process (timeout: 10 min, worker timeout: 15 min)
0:08:26 load avg: 3.93 [1/1/1] test_interpreters failed (6 failures)
Re-running test_interpreters in verbose mode (matching: test_display_preserved_exception, test_gh_109793, test_sys_path_0, test_sys_path_0, test_sys_path_0, test_sys_path_0)
test_display_preserved_exception (test.test_interpreters.test_api.TestInterpreterExec.test_display_preserved_exception) ... FAIL
test_gh_109793 (test.test_interpreters.test_lifecycle.FinalizationTests.test_gh_109793) ... FAIL
test_sys_path_0 (test.test_interpreters.test_lifecycle.StartupTests.test_sys_path_0) ...
### start subtest debug ###
# python3 script.py failed:
--- stdout ---
{
"main": "/tmp/test_python_tk7ha1xh/test_interpreters_76l2y2f4",
"sub": "/tmp/test_python_tk7ha1xh/test_interpreters_76l2y2f4"
}
------
--- stderr ---
Exception ignored in: <function Interpreter.__del__ at 0x2000119aed0>
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 157, in __del__
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 173, in _decref
TypeError: catching classes that do not inherit from BaseException is not allowed
Fatal Python error: PyInterpreterState_Delete: remaining subinterpreters
Python runtime state: finalizing (tstate=0x00005639aed8ea10)
------
### end subtest debug ###
test_sys_path_0 (test.test_interpreters.test_lifecycle.StartupTests.test_sys_path_0) [python3 script.py] ... FAIL
### start subtest debug ###
# python3 -m script failed:
--- stdout ---
{
"main": "/tmp/test_python_tk7ha1xh/test_interpreters_76l2y2f4",
"sub": "/tmp/test_python_tk7ha1xh/test_interpreters_76l2y2f4"
}
------
--- stderr ---
Exception ignored in: <function Interpreter.__del__ at 0x2000117c0d0>
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 157, in __del__
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 173, in _decref
TypeError: catching classes that do not inherit from BaseException is not allowed
Fatal Python error: PyInterpreterState_Delete: remaining subinterpreters
Python runtime state: finalizing (tstate=0x0000564591b58a10)
------
### end subtest debug ###
test_sys_path_0 (test.test_interpreters.test_lifecycle.StartupTests.test_sys_path_0) [python3 -m script] ... FAIL
### start subtest debug ###
# python3 -m pkg failed:
--- stdout ---
{
"main": "/tmp/test_python_tk7ha1xh/test_interpreters_76l2y2f4",
"sub": "/tmp/test_python_tk7ha1xh/test_interpreters_76l2y2f4"
}
------
--- stderr ---
Exception ignored in: <function Interpreter.__del__ at 0x2000118c0d0>
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 157, in __del__
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 173, in _decref
TypeError: catching classes that do not inherit from BaseException is not allowed
Fatal Python error: PyInterpreterState_Delete: remaining subinterpreters
Python runtime state: finalizing (tstate=0x000055aaa11eaa10)
------
### end subtest debug ###
test_sys_path_0 (test.test_interpreters.test_lifecycle.StartupTests.test_sys_path_0) [python3 -m pkg] ... FAIL
### start subtest debug ###
# python3 -m pkg.script failed:
--- stdout ---
{
"main": "/tmp/test_python_tk7ha1xh/test_interpreters_76l2y2f4",
"sub": "/tmp/test_python_tk7ha1xh/test_interpreters_76l2y2f4"
}
------
--- stderr ---
Exception ignored in: <function Interpreter.__del__ at 0x2000118c0d0>
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 157, in __del__
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 173, in _decref
TypeError: catching classes that do not inherit from BaseException is not allowed
Fatal Python error: PyInterpreterState_Delete: remaining subinterpreters
Python runtime state: finalizing (tstate=0x00005637ca7cfa10)
------
### end subtest debug ###
test_sys_path_0 (test.test_interpreters.test_lifecycle.StartupTests.test_sys_path_0) [python3 -m pkg.script] ... FAIL
======================================================================
FAIL: test_display_preserved_exception (test.test_interpreters.test_api.TestInterpreterExec.test_display_preserved_exception)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/__init__.py", line 2603, in wrapper
return func(*args, **kwargs)
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_api.py", line 764, in test_display_preserved_exception
self.assertEqual(stderr, dedent(f"""\
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
Traceback (most recent call last):
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<18 lines>...
RuntimeError: uh-oh!
^^^^^^^^^^^^^^^^^^^^
"""))
^^^^^
AssertionError: 'Trac[778 chars]oh!\nException ignored in: <function Interpret[519 chars]\n\n' != 'Trac[778 chars]oh!\n'
Traceback (most recent call last):
File "/tmp/test_python_tk7ha1xh/tmpkqxiakqz/script.py", line 9, in <module>
interp.exec(script)
~~~~~~~~~~~^^^^^^^^
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 227, in exec
raise ExecutionFailed(excinfo)
test.support.interpreters.ExecutionFailed: RuntimeError: uh-oh!
Uncaught in the interpreter:
Traceback (most recent call last):
File "/tmp/test_python_tk7ha1xh/tmpkqxiakqz/script.py", line 6, in script
spam.eggs()
~~~~~~~~~^^
File "/tmp/test_python_tk7ha1xh/tmpkqxiakqz/spam.py", line 6, in eggs
ham()
~~~^^
File "/tmp/test_python_tk7ha1xh/tmpkqxiakqz/spam.py", line 3, in ham
raise RuntimeError('uh-oh!')
RuntimeError: uh-oh!
- Exception ignored in: <function Interpreter.__del__ at 0x2000119aed0>
- Traceback (most recent call last):
- File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 157, in __del__
- File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 173, in _decref
- TypeError: catching classes that do not inherit from BaseException is not allowed
- Fatal Python error: PyInterpreterState_Delete: remaining subinterpreters
- Python runtime state: finalizing (tstate=0x000055b06f0a1a10)
-
======================================================================
FAIL: test_gh_10[979](https://github.com/python/cpython/actions/runs/8978599353/job/24660038142#step:19:980)3 (test.test_interpreters.test_lifecycle.FinalizationTests.test_gh_109793)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 185, in test_gh_109793
self.assertEqual(proc.returncode, 1)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
AssertionError: -6 != 1
======================================================================
FAIL: test_sys_path_0 (test.test_interpreters.test_lifecycle.StartupTests.test_sys_path_0) [python3 script.py]
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 29, in subTest
yield ctx
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 157, in test_sys_path_0
out = self.run_python(argv, cwd=cwd)
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 114, in run_python
self.assertEqual(proc.returncode, 0)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
AssertionError: -6 != 0
======================================================================
FAIL: test_sys_path_0 (test.test_interpreters.test_lifecycle.StartupTests.test_sys_path_0) [python3 -m script]
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 29, in subTest
yield ctx
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 157, in test_sys_path_0
out = self.run_python(argv, cwd=cwd)
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 114, in run_python
self.assertEqual(proc.returncode, 0)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
AssertionError: -6 != 0
======================================================================
FAIL: test_sys_path_0 (test.test_interpreters.test_lifecycle.StartupTests.test_sys_path_0) [python3 -m pkg]
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 29, in subTest
yield ctx
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 157, in test_sys_path_0
out = self.run_python(argv, cwd=cwd)
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 114, in run_python
self.assertEqual(proc.returncode, 0)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
AssertionError: -6 != 0
======================================================================
FAIL: test_sys_path_0 (test.test_interpreters.test_lifecycle.StartupTests.test_sys_path_0) [python3 -m pkg.script]
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 29, in subTest
yield ctx
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 157, in test_sys_path_0
out = self.run_python(argv, cwd=cwd)
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_interpreters/test_lifecycle.py", line 114, in run_python
self.assertEqual(proc.returncode, 0)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
AssertionError: -6 != 0
----------------------------------------------------------------------
Ran 3 tests in 1.720s
FAILED (failures=6)
test test_interpreters failed
1 test failed again:
test_interpreters
The error looks like this:
Exception ignored in: <function Interpreter.__del__ at 0x2000117c0d0>
Traceback (most recent call last):
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 157, in __del__
File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/support/interpreters/__init__.py", line 173, in _decref
TypeError: catching classes that do not inherit from BaseException is not allowed
Fatal Python error: PyInterpreterState_Delete: remaining subinterpreters
Python runtime state: finalizing (tstate=0x0000564591b58a10)
I'm fairly sure that means one of the 3 calls in _interpreters._decref() is raising a bogus exception.
It isn't clear to me how gh-118157 would have caused this to happen. As a very temporary solution, I've skipped test_interpreters on free-threading builds.
CC @colesbury
CPython versions tested on:
CPython main branch
Operating systems tested on:
No response