Builder: https://buildbot.python.org/all/#/builders/543

The buildbot has failed since 0982ded179f280176868c1c4eccf77bf70687816:
bpo-44032: Move pointer to code object from frame-object to frame specials array. (GH-26771)

Test stdio log attached.

Fatal Python error: Py_EndInterpreter: thread still has a frame
Python runtime state: initialized

Thread 0x00007ff625ee4740 (most recent call first):
  File "<string>", line 4 in <module>
make: *** [Makefile:1256: buildbottest] Aborted (core dumped)
program finished with exit code 2
elapsedTime=382.700268
test_still_running (test.test__xxsubinterpreters.DestroyTests) ...

test-stdio.txt:

======================================================================
FAIL: test_from_subinterpreter (test.test_interpreters.TestInterpreterIsRunning)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-x86_64/build/Lib/test/test_interpreters.py", line 265, in test_from_subinterpreter
    self.assertEqual(out.strip(), 'True')
AssertionError: 'False' != 'True'
- False
+ True

======================================================================
FAIL: test_main (test.test_interpreters.TestInterpreterIsRunning)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-fedora-stable-x86_64/build/Lib/test/test_interpreters.py", line 245, in test_main
    self.assertTrue(main.is_running())
AssertionError: False is not true

And today's price for uninformative error message goes to...
"AssertionError: 'False' != 'True'"

;)


I'm looking into it.

I cannot reproduce this on ubuntu

Ubuntu 20.04.2 LTS
gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0

I've tried these configs:
./configure --with-pydebug
./configure
./configure --enable-optimizations
./configure --enable-optimizations --with-lto


I also tried turning the timeout down to 2 seconds, but the failure doesn't look anything like the reported error.

Can someone with fedora reproduce this failure?

On my laptop with 4 physical CPUs (8 threads), I can reproduce test_still_running() random failure with:

$ ./python -m test test__xxsubinterpreters -j50 -v -F
(...)
0:00:37 load avg: 24.31 [ 19/1] test__xxsubinterpreters failed (36.2 sec) (...)
(...)
======================================================================
FAIL: test_still_running (test.test__xxsubinterpreters.DestroyTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/vstinner/python/main/Lib/test/test__xxsubinterpreters.py", line 753, in test_still_running
    self.assertTrue(interpreters.is_running(interp),
AssertionError: False is not true : Interp 48 should be running before destruction.

FAILED (failures=1, skipped=6)

Warning -- Uncaught thread exception: RuntimeError
Exception in thread Thread-7 (run):
Traceback (most recent call last):
  File "/home/vstinner/python/main/Lib/threading.py", line 1009, in _bootstrap_inner
    self.run()
  File "/home/vstinner/python/main/Lib/threading.py", line 946, in run
    self._target(*self._args, **self._kwargs)
  File "/home/vstinner/python/main/Lib/test/test__xxsubinterpreters.py", line 46, in run
    interpreters.run_string(interp, dedent(f"""
RuntimeError: unrecognized interpreter ID 48

test test__xxsubinterpreters failed

FYI, this buildbot has been green after Victor's git clean adjustment in the buildbot repo.

I've been trying to reproduce the test_still_running failure on the buildbot, but have not been able to do so deterministically.

The AMD64 Fedora Stable 3.x buildbot has not been red for one week. Closing this now. Victor/Pablo, please reopen if you disagree.