Open
Description
Steps To Reproduce
sage: R.<x> = QQ[]
sage: M = span( [[x, x^2+1], [1/x, x^3]], R)
sage: B = M._FreeModule_submodule_with_basis_pid__basis
sage: B[0]
(1/x, x^3)
sage: B[0][0] * x
1
sage: B[0] * xExpected Behavior
Should not crash but provide the correct output as (1, x^4)
Actual Behavior
Crashes (segmentation fault) with following stack trace -
------------------------------------------------------------------------
/home/sahil/miniforge3/envs/sage-dev/lib/python3.12/site-packages/cysignals/signals.cpython-312-x86_64-linux-gnu.so(+0x8ecc) [0x705464fa3ecc]
/home/sahil/miniforge3/envs/sage-dev/lib/python3.12/site-packages/cysignals/signals.cpython-312-x86_64-linux-gnu.so(+0x8f99) [0x705464fa3f99]
/home/sahil/miniforge3/envs/sage-dev/lib/python3.12/site-packages/cysignals/signals.cpython-312-x86_64-linux-gnu.so(+0xb8f7) [0x705464fa68f7]
/lib/x86_64-linux-gnu/libc.so.6(+0x45810) [0x705465845810]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/rings/fraction_field_element.cpython-312-x86_64-linux-gnu.so(+0x2b614) [0x70541bdd1614]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/modules/free_module_element.cpython-312-x86_64-linux-gnu.so(+0x34c37) [0x705410994c37]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/structure/coerce_actions.cpython-312-x86_64-linux-gnu.so(+0x1486e) [0x705410a3f86e]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/categories/action.cpython-312-x86_64-linux-gnu.so(+0xecd0) [0x70546433dcd0]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/categories/action.cpython-312-x86_64-linux-gnu.so(+0x12ee7) [0x705464341ee7]
python3(+0x21204b) [0x6452a2c1d04b]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/structure/coerce_actions.cpython-312-x86_64-linux-gnu.so(+0x18260) [0x705410a43260]
python3(+0x1ff5c5) [0x6452a2c0a5c5]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/structure/coerce_actions.cpython-312-x86_64-linux-gnu.so(+0x1e8f6) [0x705410a498f6]
python3(+0x21204b) [0x6452a2c1d04b]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/structure/parent.cpython-312-x86_64-linux-gnu.so(+0x3d1ed) [0x7054647f01ed]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/structure/parent.cpython-312-x86_64-linux-gnu.so(+0x286c5) [0x7054647db6c5]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/structure/coerce.cpython-312-x86_64-linux-gnu.so(+0x378b5) [0x7054644f78b5]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/structure/coerce.cpython-312-x86_64-linux-gnu.so(+0x19ec4) [0x7054644d9ec4]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/structure/coerce.cpython-312-x86_64-linux-gnu.so(+0x2431d) [0x7054644e431d]
/home/sahil/kaam-ki-cheezein/repozzz/sage/build/cp312/src/sage/structure/element.cpython-312-x86_64-linux-gnu.so(+0x1a8aa) [0x705464f078aa]
python3(PyNumber_Multiply+0x49) [0x6452a2c61ed9]
python3(+0x1139e4) [0x6452a2b1e9e4]
python3(PyEval_EvalCode+0xa1) [0x6452a2cbb4f1]
python3(+0x2ccc8c) [0x6452a2cd7c8c]
python3(+0x1133a7) [0x6452a2b1e3a7]
python3(+0x2c4b0f) [0x6452a2ccfb0f]
python3(+0x2c5db7) [0x6452a2cd0db7]
python3(+0x11418b) [0x6452a2b1f18b]
python3(PyEval_EvalCode+0xa1) [0x6452a2cbb4f1]
python3(+0x2eaafa) [0x6452a2cf5afa]
python3(+0x2e57b5) [0x6452a2cf07b5]
python3(+0x2e2850) [0x6452a2ced850]
python3(_PyRun_SimpleFileObject+0x1ce) [0x6452a2ced56e]
python3(_PyRun_AnyFileObject+0x44) [0x6452a2ced2a4]
python3(Py_RunMain+0x3a2) [0x6452a2cea1c2]
python3(Py_BytesMain+0x37) [0x6452a2ca55d7]
/lib/x86_64-linux-gnu/libc.so.6(+0x2a338) [0x70546582a338]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x8b) [0x70546582a3fb]
python3(+0x29a47d) [0x6452a2ca547d]
------------------------------------------------------------------------
Attaching gdb to process id <>.
Additional Information
No response
Environment
- OS: Ubuntu 25.04
- Sage Version: 10.7.beta6
Checklist
- I have searched the existing issues for a bug report that matches the one I want to file, without success.
- I have read the documentation and troubleshoot guide