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Fix another libgap segmentation fault #40728

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Fix another libgap segmentation fault #40728

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7eeab93
Fix another libgap segmentation fault
user202729 Aug 30, 2025
0fe1844
Merge remote-tracking branch 'upstream/develop' into fix-gap-crash
user202729 Sep 11, 2025
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26 changes: 15 additions & 11 deletions src/sage/libs/gap/element.pyx
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Original file line number Diff line number Diff line change
Expand Up @@ -45,21 +45,25 @@
- ``a`` -- list of :class:`GapElement`

OUTPUT: list of the elements in ``a`` as a Gap ``Obj``

TESTS::

sage: from sage.doctest.util import ensure_interruptible_after
sage: for i in range(10):

Check failure on line 52 in src/sage/libs/gap/element.pyx

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GitHub Actions / test-long (src/sage/[g-o]*)

Failed example: 

Failed example:: Exception raised:
Traceback (most recent call last):
  File "/sage/src/sage/doctest/forker.py", line 733, in _run
    self.compile_and_execute(example, compiler, test.globs)
  File "/sage/src/sage/doctest/forker.py", line 1157, in compile_and_execute
    exec(compiled, globs)
  File "<doctest sage.libs.gap.element.NULL[1]>", line 2, in <module>
    with ensure_interruptible_after(RealNumber('0.1')):
  File "/usr/lib/python3.12/contextlib.py", line 144, in __exit__
    next(self.gen)
  File "/sage/src/sage/doctest/util.py", line 912, in ensure_interruptible_after
    raise RuntimeError(f"Function terminates early after {elapsed:.4f} < {seconds:.4f} seconds")
RuntimeError: Function terminates early after 0.0681 < 0.1000 seconds

Check failure on line 52 in src/sage/libs/gap/element.pyx

View workflow job for this annotation

GitHub Actions / Conda (ubuntu, Python 3.12, new)

Failed example: 

Failed example:: Exception raised:
Traceback (most recent call last):
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 733, in _run
    self.compile_and_execute(example, compiler, test.globs)
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 1157, in compile_and_execute
    exec(compiled, globs)
  File "<doctest sage.libs.gap.element.NULL[1]>", line 2, in <module>
    with ensure_interruptible_after(RealNumber('0.1')):
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.12/contextlib.py", line 144, in __exit__
    next(self.gen)
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/util.py", line 912, in ensure_interruptible_after
    raise RuntimeError(f"Function terminates early after {elapsed:.4f} < {seconds:.4f} seconds")
RuntimeError: Function terminates early after 0.0633 < 0.1000 seconds

Check failure on line 52 in src/sage/libs/gap/element.pyx

View workflow job for this annotation

GitHub Actions / Conda (ubuntu, Python 3.12, all)

Failed example: 

Failed example:: Exception raised:
Traceback (most recent call last):
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 733, in _run
    self.compile_and_execute(example, compiler, test.globs)
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 1157, in compile_and_execute
    exec(compiled, globs)
  File "<doctest sage.libs.gap.element.NULL[1]>", line 2, in <module>
    with ensure_interruptible_after(RealNumber('0.1')):
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.12/contextlib.py", line 144, in __exit__
    next(self.gen)
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/util.py", line 912, in ensure_interruptible_after
    raise RuntimeError(f"Function terminates early after {elapsed:.4f} < {seconds:.4f} seconds")
RuntimeError: Function terminates early after 0.1191 < 0.1000 seconds

Check failure on line 52 in src/sage/libs/gap/element.pyx

View workflow job for this annotation

GitHub Actions / Conda (ubuntu, Python 3.11, all)

Failed example: 

Failed example:: Exception raised:
Traceback (most recent call last):
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.11/site-packages/sage/doctest/forker.py", line 733, in _run
    self.compile_and_execute(example, compiler, test.globs)
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.11/site-packages/sage/doctest/forker.py", line 1157, in compile_and_execute
    exec(compiled, globs)
  File "<doctest sage.libs.gap.element.NULL[1]>", line 2, in <module>
    with ensure_interruptible_after(RealNumber('0.1')):
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.11/contextlib.py", line 144, in __exit__
    next(self.gen)
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.11/site-packages/sage/doctest/util.py", line 912, in ensure_interruptible_after
    raise RuntimeError(f"Function terminates early after {elapsed:.4f} < {seconds:.4f} seconds")
RuntimeError: Function terminates early after 0.1346 < 0.1000 seconds

Check failure on line 52 in src/sage/libs/gap/element.pyx

View workflow job for this annotation

GitHub Actions / Conda (ubuntu, Python 3.12, all, editable)

Failed example: 

Failed example:: Exception raised:
Traceback (most recent call last):
  File "/home/runner/work/sage/sage/src/sage/doctest/forker.py", line 733, in _run
    self.compile_and_execute(example, compiler, test.globs)
  File "/home/runner/work/sage/sage/src/sage/doctest/forker.py", line 1157, in compile_and_execute
    exec(compiled, globs)
  File "<doctest sage.libs.gap.element.NULL[1]>", line 2, in <module>
    with ensure_interruptible_after(RealNumber('0.1')):
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/share/miniconda/envs/sage-dev/lib/python3.12/contextlib.py", line 144, in __exit__
    next(self.gen)
  File "/home/runner/work/sage/sage/src/sage/doctest/util.py", line 912, in ensure_interruptible_after
    raise RuntimeError(f"Function terminates early after {elapsed:.4f} < {seconds:.4f} seconds")
RuntimeError: Function terminates early after 0.0980 < 0.1000 seconds

Check failure on line 52 in src/sage/libs/gap/element.pyx

View workflow job for this annotation

GitHub Actions / Conda (macos, Python 3.11, all)

Failed example: 

Failed example:: Exception raised:
Traceback (most recent call last):
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.11/site-packages/sage/doctest/forker.py", line 733, in _run
    self.compile_and_execute(example, compiler, test.globs)
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.11/site-packages/sage/doctest/forker.py", line 1157, in compile_and_execute
    exec(compiled, globs)
  File "<doctest sage.libs.gap.element.NULL[1]>", line 2, in <module>
    with ensure_interruptible_after(RealNumber('0.1')):
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.11/contextlib.py", line 144, in __exit__
    next(self.gen)
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.11/site-packages/sage/doctest/util.py", line 912, in ensure_interruptible_after
    raise RuntimeError(f"Function terminates early after {elapsed:.4f} < {seconds:.4f} seconds")
RuntimeError: Function terminates early after 0.0657 < 0.1000 seconds

Check failure on line 52 in src/sage/libs/gap/element.pyx

View workflow job for this annotation

GitHub Actions / Conda (macos, Python 3.12, all)

Failed example: 

Failed example:: Exception raised:
Traceback (most recent call last):
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 733, in _run
    self.compile_and_execute(example, compiler, test.globs)
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/forker.py", line 1157, in compile_and_execute
    exec(compiled, globs)
  File "<doctest sage.libs.gap.element.NULL[1]>", line 2, in <module>
    with ensure_interruptible_after(RealNumber('0.1')):
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/contextlib.py", line 144, in __exit__
    next(self.gen)
  File "/Users/runner/miniconda3/envs/sage-dev/lib/python3.12/site-packages/sage/doctest/util.py", line 912, in ensure_interruptible_after
    raise RuntimeError(f"Function terminates early after {elapsed:.4f} < {seconds:.4f} seconds")
RuntimeError: Function terminates early after 0.0887 < 0.1000 seconds
....: with ensure_interruptible_after(0.1):
....: ignore = libgap([1000]*10000)
....: with ensure_interruptible_after(0.3):
....: ignore = libgap([1000]*100000)
"""
cdef Obj l
cdef GapElement elem
cdef int i
cdef tuple gap_elements = tuple(x if isinstance(x, GapElement) else libgap(x) for x in sage_list)
cdef Py_ssize_t n = len(gap_elements), i

try:
GAP_Enter()
l = GAP_NewPlist(0)

for i, x in enumerate(sage_list):
if not isinstance(x, GapElement):
elem = <GapElement>libgap(x)
else:
elem = <GapElement>x

GAP_AssList(l, i + 1, elem.value)
l = GAP_NewPlist(n)
for i in range(n):
GAP_AssList(l, i + 1, (<GapElement> gap_elements[i]).value)
return l
finally:
GAP_Leave()
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