`python -m test -v test_call` segfault with clang 22.1.3 build

[ppigazzini]

Crash report

What happened?

python 3.14.4 built as with Clang 22.1.3 and pyenv (on 3 different Ubuntu 24.04 machines):

$ CC="clang" CXX="clang++" LDFLAGS="${LDFLAGS:+$LDFLAGS }-fuse-ld=lld" PYTHON_CONFIGURE_OPTS="--enable-optimizations --with-lto" PYTHON_CFLAGS="-march=native -mtune=native" pyenv install 3.14.4

$ python -m test -v test_call
== CPython 3.14.4 (main, Apr 9 2026, 07:24:07) [Clang 22.1.3 (++20260402073256+4250a0fc5de9-1~exp1~20260402073413.57)]
== Linux-6.8.0-107-generic-x86_64-with-glibc2.39 little-endian
== Python build: release shared ThinLTO+PGO
== cwd: /tmp/test_python_worker_93691æ
== CPU count: 4
== encodings: locale=UTF-8 FS=utf-8
== resources: all test resources are disabled, use -u option to unskip tests

Using random seed: 1791553283
0:00:00 load avg: 0.00 Run 1 test sequentially in a single process
0:00:00 load avg: 0.00 [1/1] test_call
test_module_not_callable_no_suggestion_0 (test.test_call.CFunctionCallsErrorMessages.test_module_not_callable_no_suggestion_0) ... ok
...
...
test_margin_is_sufficient (test.test_call.TestRecursion.test_margin_is_sufficient) ... FAIL
test_recursion_with_kwargs (test.test_call.TestRecursion.test_recursion_with_kwargs) ... ok
test_super_deep (test.test_call.TestRecursion.test_super_deep) ... Fatal Python error: Segmentation fault

Current thread 0x00007a261a915b80 [python] (most recent call first):
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse

Current thread's C stack trace (most recent call first):
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _Py_DumpStack+0x29 [0x7a261b007919]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x60dd5f [0x7a261b00dd5f]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x60dc2d [0x7a261b00dc2d]
  Binary file "/lib/x86_64-linux-gnu/libc.so.6", at +0x45330 [0x7a261a645330]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x226 [0x7a261ac164b6]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2a7e3c [0x7a261aca7e3c]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7a261ad003a9]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1da74 [0x7a261ac33d04]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2a7e3c [0x7a261aca7e3c]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7a261ad003a9]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1da74 [0x7a261ac33d04]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2a7e3c [0x7a261aca7e3c]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7a261ad003a9]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1da74 [0x7a261ac33d04]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2a7e3c [0x7a261aca7e3c]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7a261ad003a9]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1da74 [0x7a261ac33d04]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2a7e3c [0x7a261aca7e3c]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7a261ad003a9]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1da74 [0x7a261ac33d04]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2a7e3c [0x7a261aca7e3c]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7a261ad003a9]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1da74 [0x7a261ac33d04]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2a7e3c [0x7a261aca7e3c]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7a261ad003a9]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1da74 [0x7a261ac33d04]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2a7e3c [0x7a261aca7e3c]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7a261ad003a9]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1da74 [0x7a261ac33d04]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2a7e3c [0x7a261aca7e3c]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7a261ad003a9]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1da74 [0x7a261ac33d04]
  <truncated rest of calls>

Extension modules: _testcapi, _testlimitedcapi, _testinternalcapi (total: 3)
Segmentation fault (core dumped)

CPython versions tested on:

3.14

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

Python 3.14.4 (main, Apr 9 2026, 07:24:07) [Clang 22.1.3 (++20260402073256+4250a0fc5de9-1exp120260402073413.57)]

Linked PRs

• [3.14]: gh-148284: Move stackref buffer to per-eval loop, and don't override PGO data. #148310

[Fidget-Spinner]

Knowing our luck, there's a chance this might be due to LTO inlining things again that shouldn't be inlined. Can you try passing --with-tail-call-interp do your build and see if it still fails? If it doesn't, then that means it's time to play the game of finding the function to outline.

[ppigazzini]

Passed that test using --with-tail-call-interp, now I'm running the whole test suit.

CC="clang" CXX="clang++" LDFLAGS="${LDFLAGS:+$LDFLAGS }-fuse-ld=lld" PYTHON_CONFIGURE_OPTS="--enable-optimizations --with-lto --with-tail-call-interp" PYTHON_CFLAGS="-march=native -mtune=native" pyenv install 3.14.4

python -m test test_call
Using random seed: 1273119896
0:00:00 load avg: 1.48 Run 1 test sequentially in a single process
0:00:00 load avg: 1.48 [1/1] test_call
0:00:00 load avg: 1.48 [1/1] test_call passed

== Tests result: SUCCESS ==

1 test OK.

Total duration: 208 ms
Total tests: run=186
Total test files: run=1/1
Result: SUCCESS

To add more context, it seems an issue highlighted by clang 22.
python 3.14.3 shows the same issue with clang 22 but it passed the tests with clang 21 (but for https://github.com/python/cpython/issues/142414d).

EDIT:

python 3.14.4 built with clang22 and --with-tail-call-interp completes the whole test (but the open issue with test_struct)

== Tests result: FAILURE ==

22 tests skipped:
    test.test_asyncio.test_windows_events
    test.test_asyncio.test_windows_utils test.test_gdb.test_backtrace
    test.test_gdb.test_cfunction test.test_gdb.test_cfunction_full
    test.test_gdb.test_misc test.test_gdb.test_pretty_print
    test_android test_apple test_asdl_parser test_clinic test_devpoll
    test_free_threading test_generated_cases test_kqueue test_launcher
    test_msvcrt test_startfile test_winapi test_winconsoleio
    test_winreg test_wmi

11 tests skipped (resource denied):
    test_curses test_peg_generator test_smtpnet test_socketserver
    test_tkinter test_ttk test_urllib2net test_urllibnet test_winsound
    test_xpickle test_zipfile64

1 test failed:
    test_struct

458 tests OK.

Total duration: 18 min 18 sec
Total tests: run=47,323 skipped=2,331
Total test files: run=481/492 failed=1 skipped=22 resource_denied=11
Result: FAILURE

[Fidget-Spinner]

Just to make sure I'm diagnosing the issue correctly, please try this fix on 3.14 and tell me if it works:

Fix 1:

diff --git a/Python/ceval_macros.h b/Python/ceval_macros.h
index 4a878d6dff4..5b9762866a2 100644
--- a/Python/ceval_macros.h
+++ b/Python/ceval_macros.h
@@ -425,7 +425,7 @@ do { \
 /* Stackref macros */
 
 /* How much scratch space to give stackref to PyObject* conversion. */
-#define MAX_STACKREF_SCRATCH 10
+#define MAX_STACKREF_SCRATCH 1
 
 #define STACKREFS_TO_PYOBJECTS(ARGS, ARG_COUNT, NAME) \
     /* +1 because vectorcall might use -1 to write self */ \

[ppigazzini]

The patch looks good.

usr00@pp-lap-00:~$ CC="clang" CXX="clang++" \
LDFLAGS="${LDFLAGS:+$LDFLAGS }-fuse-ld=lld" \
PYTHON_CONFIGURE_OPTS="--enable-optimizations --with-lto" \
PYTHON_CFLAGS="-march=native -mtune=native" \
pyenv install --patch 3.14.4 < ~/patches/stackref.patch
Downloading Python-3.14.4.tar.xz...
-> https://www.python.org/ftp/python/3.14.4/Python-3.14.4.tar.xz
Installing Python-3.14.4...
patching file Python/ceval_macros.h
Installed Python-3.14.4 to /home/usr00/.pyenv/versions/3.14.4

usr00@pp-lap-00:~$ pyenv shell 3.14.4

usr00@pp-lap-00:~$ python -m test test_call
Using random seed: 2420094728
0:00:00 load avg: 3.52 Run 1 test sequentially in a single process
0:00:00 load avg: 3.52 [1/1] test_call
0:00:00 load avg: 3.52 [1/1] test_call passed

== Tests result: SUCCESS ==

1 test OK.

Total duration: 217 ms
Total tests: run=186
Total test files: run=1/1
Result: SUCCESS

usr00@pp-lap-00:~$ python -VV
Python 3.14.4 (main, Apr  9 2026, 17:52:49) [Clang 22.1.3 (++20260402073256+4250a0fc5de9-1~exp1~20260402073413.57)]

[Fidget-Spinner]

Thanks, it's confirmed then, what's happening is the stack usage is too high with the stackref buffer. We need to move the it to the heap. I earlier suggested this, but it seems now we need it for correctness #138115

[Fidget-Spinner]

I can't reproduce this locally with LLVM 22.1.3 and Python 3.14.4+. However, I believe this is probably real. Do you know if pyenv does anything special to their builds? I'm not using pyenv to test this out.

Also I just dissasembled the stack consumption (rsp) and compared a non-shared and shared version. It's rsp-1736 vs rsp-1784. So it seems stack consumption is higher on shared builds.

[ppigazzini]

I'm not an expert of pyenv internals, I start sharing the log of a build with the issue python-build.20260409071620.66319.zip

[Fidget-Spinner]

@ppigazzini ok, last time debugging please :). If this works, I can fix the issue and mark this as release blocker

please apply the following patch, and let me know if things work:

diff --git a/Python/ceval.c b/Python/ceval.c
index 377b4644edd..b7867c72772 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -1238,6 +1238,8 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
 #endif
     }
 
+    PyObject *STACKREF_SCRATCH[MAX_STACKREF_SCRATCH+1];
+
 #if defined(_Py_TIER2) && !defined(_Py_JIT)
     /* Tier 2 interpreter state */
     _PyExecutorObject *current_executor = NULL;
diff --git a/Python/ceval_macros.h b/Python/ceval_macros.h
index 4a878d6dff4..3b39ea91ec2 100644
--- a/Python/ceval_macros.h
+++ b/Python/ceval_macros.h
@@ -429,7 +429,7 @@ do { \
 
 #define STACKREFS_TO_PYOBJECTS(ARGS, ARG_COUNT, NAME) \
     /* +1 because vectorcall might use -1 to write self */ \
-    PyObject *NAME##_temp[MAX_STACKREF_SCRATCH+1]; \
+    PyObject **NAME##_temp = (PyObject **)&STACKREF_SCRATCH; \
     PyObject **NAME = _PyObjectArray_FromStackRefArray(ARGS, ARG_COUNT, NAME##_temp + 1);
 
 #define STACKREFS_TO_PYOBJECTS_CLEANUP(NAME) \

Viewing the dissassembly, the stack usage is cut by 1/3rd with this patch on LLVM 22.

[ppigazzini]

Ok, give me 10 minutes.

$ CC="clang" CXX="clang++" \
LDFLAGS="${LDFLAGS:+$LDFLAGS }-fuse-ld=lld" \
PYTHON_CONFIGURE_OPTS="--enable-optimizations --with-lto" \
PYTHON_CFLAGS="-march=native -mtune=native" \
pyenv install --patch 3.14.4 < ~/patches/stackref_2.patch
Downloading Python-3.14.4.tar.xz...
-> https://www.python.org/ftp/python/3.14.4/Python-3.14.4.tar.xz
Installing Python-3.14.4...
patching file Python/ceval.c
patching file Python/ceval_macros.h

[ppigazzini]

Logs of the build python-build.zip

$ python -VV
Python 3.14.4 (main, Apr  9 2026, 20:55:10) [Clang 22.1.3 (++20260402073256+4250a0fc5de9-1~exp1~20260402073413.57)]

python -m test test_call
Using random seed: 2721431693
0:00:00 load avg: 3.63 Run 1 test sequentially in a single process
0:00:00 load avg: 3.63 [1/1] test_call
Fatal Python error: Segmentation fault

Current thread 0x00007eab02994b80 [python] (most recent call first):
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse
  File "/home/usr00/.pyenv/versions/3.14.4/lib/python3.14/test/test_call.py", line 1081 in c_recurse

Current thread's C stack trace (most recent call first):
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _Py_DumpStack+0x29 [0x7eab0280f969]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x615d9f [0x7eab02815d9f]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x615c6d [0x7eab02815c6d]
  Binary file "/lib/x86_64-linux-gnu/libc.so.6", at +0x45330 [0x7eab01e45330]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x226 [0x7eab0241b856]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2ab715 [0x7eab024ab715]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7eab02501749]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1dc76 [0x7eab024392a6]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2ab715 [0x7eab024ab715]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7eab02501749]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1dc76 [0x7eab024392a6]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2ab715 [0x7eab024ab715]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7eab02501749]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1dc76 [0x7eab024392a6]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2ab715 [0x7eab024ab715]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7eab02501749]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1dc76 [0x7eab024392a6]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2ab715 [0x7eab024ab715]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7eab02501749]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1dc76 [0x7eab024392a6]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2ab715 [0x7eab024ab715]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7eab02501749]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1dc76 [0x7eab024392a6]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2ab715 [0x7eab024ab715]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7eab02501749]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1dc76 [0x7eab024392a6]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2ab715 [0x7eab024ab715]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7eab02501749]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1dc76 [0x7eab024392a6]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at +0x2ab715 [0x7eab024ab715]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at PyObject_Vectorcall+0x59 [0x7eab02501749]
  Binary file "/home/usr00/.pyenv/versions/3.14.4/lib/libpython3.14.so.1.0", at _PyEval_EvalFrameDefault+0x1dc76 [0x7eab024392a6]
  <truncated rest of calls>

Extension modules: _testcapi, _testlimitedcapi, _testinternalcapi (total: 3)
Segmentation fault (core dumped)