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[BUG] C tests fail with Python 3.11

See original GitHub issue

Describe the bug In shards 1 and 6 of the C tests some of the test don’t pass on Python 3.11 (3.11.0-beta.1). See the full log below.

To Reproduce Run Tools/ci-run.sh as defined in the CI configuration with Python 3.11. See this test run.

Expected behavior All CI tests pass, as on other Python versions.

Environment (please complete the following information):

OS: Linux (Ubuntu 18.04)
Python version: 3.11.0-beta.1
Cython version: 812585935131125f8988c38417bb73bfd5a81c05

Full error log

Sharded tests run in 590 seconds (9.8 minutes)
Errors found in shards 1, 6

Errors from shard 1:
======================================================================
FAIL: fail_on_line_trace (line_trace)
Doctest: line_trace.fail_on_line_trace
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.11.0-beta.1/x64/lib/python3.11/doctest.py", line 2217, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Failed doctest test for line_trace.fail_on_line_trace
  File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line unknown line number, in fail_on_line_trace

----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result = fail_on_line_trace(None, py_add, py_add_with_nogil)
Expected nothing
Got:
    unsupported operand type(s) for -: 'NoneType' and 'int'
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    len(result)
Expected:
    17
Got:
    3
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result[:5]  # py
Expected:
    ['NO ERROR', ('call', 0), ('line', 1), ('line', 2), ('return', 2)]
Got:
    ['NO ERROR', ('call', 2), ('line', 2)]
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result[5:10]  # py
Expected:
    [('call', 0), ('line', 1), ('line', 2), ('line', 3), ('line', 4)]
Got:
    []
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result[10:14]  # py
Expected:
    [('call', 0), ('line', 1), ('line', 2), ('return', 2)]
Got:
    []
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result[14:]  # py
Expected:
    [('line', 2), ('line', 5), ('return', 5)]
Got:
    []
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result = fail_on_line_trace('py_add_with_nogil', py_add, py_add_with_nogil)  # py
Expected:
    failing line trace!
Got:
    unsupported operand type(s) for -: 'NoneType' and 'int'
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result  # py
Expected:
    ['py_add_with_nogil', ('call', 0), ('line', 1), ('line', 2), ('return', 2), ('call', 0)]
Got:
    ['NO ERROR', ('call', 2), ('line', 2)]
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result = fail_on_line_trace('py_add', py_add, py_add_with_nogil)  # py
Expected:
    failing line trace!
Got:
    unsupported operand type(s) for -: 'NoneType' and 'int'
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result[:5]  # py
Expected:
    ['py_add', ('call', 0), ('line', 1), ('line', 2), ('return', 2)]
Got:
    ['NO ERROR', ('call', 2), ('line', 2)]
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.fail_on_line_trace
Failed example:
    result[5:]  # py
Expected:
    [('call', 0), ('line', 1), ('line', 2), ('line', 3), ('line', 4), ('call', 0)]
Got:
    []


======================================================================
FAIL: run_trace (line_trace)
Doctest: line_trace.run_trace
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.11.0-beta.1/x64/lib/python3.11/doctest.py", line 2217, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Failed doctest test for line_trace.run_trace
  File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line unknown line number, in run_trace

----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.run_trace
Failed example:
    run_trace(py_add, 1, 2)
Exception raised:
    Traceback (most recent call last):
      File "/opt/hostedtoolcache/Python/3.11.0-beta.1/x64/lib/python3.11/doctest.py", line 1346, in __run
        exec(compile(example.source, filename, "single",
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "<doctest line_trace.run_trace[2]>", line 1, in <module>
        run_trace(py_add, 1, 2)
        ^^^^^^^^^^^^^^^^^^^^^^^
      File "tests/run/line_trace.pyx", line 231, in line_trace.run_trace (line_trace.c:7047)
        func(*args)
      File "tests/run/line_trace.pyx", line 60, in line_trace.trace_trampoline (line_trace.c:3507)
        raise
      File "tests/run/line_trace.pyx", line 54, in line_trace.trace_trampoline (line_trace.c:3406)
        result = callback(frame, what, arg)
      File "tests/run/line_trace.pyx", line 81, in line_trace._create_trace_func._trace_func (line_trace.c:3974)
        trace.append((map_trace_types(event, event), frame.f_lineno - frame.f_code.co_firstlineno))
    TypeError: unsupported operand type(s) for -: 'NoneType' and 'int'
----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/1/run/c/line_trace/line_trace.cpython-311-x86_64-linux-gnu.so", line ?, in line_trace.run_trace
Failed example:
    run_trace(py_add, 1, 2, with_sys=True)
Exception raised:
    Traceback (most recent call last):
      File "/opt/hostedtoolcache/Python/3.11.0-beta.1/x64/lib/python3.11/doctest.py", line 1346, in __run
        exec(compile(example.source, filename, "single",
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "<doctest line_trace.run_trace[4]>", line 1, in <module>
        run_trace(py_add, 1, 2, with_sys=True)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "tests/run/line_trace.pyx", line 231, in line_trace.run_trace (line_trace.c:7047)
        func(*args)
      File "<doctest line_trace.run_trace[0]>", line 3, in py_add
        return x
        ^^^^^^^^
      File "tests/run/line_trace.pyx", line 81, in line_trace._create_trace_func._trace_func (line_trace.c:3974)
        trace.append((map_trace_types(event, event), frame.f_lineno - frame.f_code.co_firstlineno))
    TypeError: unsupported operand type(s) for -: 'NoneType' and 'int'



Errors from shard 6:
======================================================================
FAIL: test_deduplicated_args (tuple_constants)
Doctest: tuple_constants.test_deduplicated_args
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.11.0-beta.1/x64/lib/python3.11/doctest.py", line 2217, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Failed doctest test for tuple_constants.test_deduplicated_args
  File "/home/runner/work/cython/cython/TEST_TMP/6/run/c/tuple_constants/tuple_constants.cpython-311-x86_64-linux-gnu.so", line unknown line number, in test_deduplicated_args

----------------------------------------------------------------------
File "/home/runner/work/cython/cython/TEST_TMP/6/run/c/tuple_constants/tuple_constants.cpython-311-x86_64-linux-gnu.so", line ?, in tuple_constants.test_deduplicated_args
Failed example:
    test_deduplicated_args()
Exception raised:
    Traceback (most recent call last):
      File "/opt/hostedtoolcache/Python/3.11.0-beta.1/x64/lib/python3.11/doctest.py", line 1346, in __run
        exec(compile(example.source, filename, "single",
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      File "<doctest tuple_constants.test_deduplicated_args[0]>", line 1, in <module>
        test_deduplicated_args()
        ^^^^^^^^^^^^^^^^^^^^^^^^
      File "tests/run/tuple_constants.pyx", line 40, in tuple_constants.test_deduplicated_args (tuple_constants.c:3004)
        assert func1.__code__.co_varnames is func2.__code__.co_varnames
    AssertionError