Error in `python': double free or corruption (out)

```bash
$ python
Python 3.6.13 | packaged by conda-forge | (default, Sep 23 2021, 07:56:31)
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from cylp.cy import CyClpSimplex
>>> s = CyClpSimplex()
*** Error in `python': double free or corruption (out): 0x000056182c3083f0 ***
======= Backtrace: =========
/usr/lib64/libc.so.6(+0x81679)[0x7f26c37c4679]
/conda/envs/notebook/lib/libstdc++.so.6(_ZNSs6assignERKSs+0x41)[0x7f26c2b209a5]
/conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyClpSimplex.cpython-36m-x86_64-linux-gnu.so(_ZN11IClpSimplexC2EP7_objectPFiPvEPFiS2_iE+0xd4)[0x7f26b8a4fc64]
/conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyClpSimplex.cpython-36m-x86_64-linux-gnu.so(+0x67d05)[0x7f26b8a93d05]
python(+0xf9ed6)[0x56182aba0ed6]
python(_PyObject_FastCallKeywords+0x193)[0x56182abfc443]
python(+0x155e65)[0x56182abfce65]
python(_PyEval_EvalFrameDefault+0x53c)[0x56182ac4b7bc]
python(+0xe9a95)[0x56182ab90a95]
python(PyEval_EvalCodeEx+0x39)[0x56182ab91f29]
python(PyEval_EvalCode+0x1b)[0x56182ac6387b]
python(+0x2239b3)[0x56182acca9b3]
python(+0xc7473)[0x56182ab6e473]
python(PyRun_InteractiveLoopFlags+0xed)[0x56182ab6ed75]
python(+0xc7e14)[0x56182ab6ee14]
python(Py_Main+0x6a7)[0x56182acd0d67]
python(main+0xe7)[0x56182ab73d17]
/usr/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f26c3765505]
python(+0x1ab83d)[0x56182ac5283d]
======= Memory map: ========
56182aaa7000-56182aafe000 r--p 00000000 fd:08 1330795 /conda/envs/notebook/bin/python3.6
56182aafe000-56182acd5000 r-xp 00057000 fd:08 1330795 /conda/envs/notebook/bin/python3.6
56182acd5000-56182ad7b000 r--p 0022e000 fd:08 1330795 /conda/envs/notebook/bin/python3.6
56182ad7c000-56182ad7f000 r--p 002d4000 fd:08 1330795 /conda/envs/notebook/bin/python3.6
56182ad7f000-56182ade2000 rw-p 002d7000 fd:08 1330795 /conda/envs/notebook/bin/python3.6
56182ade2000-56182ae13000 rw-p 00000000 00:00 0
56182bd27000-56182c325000 rw-p 00000000 00:00 0 [heap]
7f2690000000-7f2690021000 rw-p 00000000 00:00 0
7f2690021000-7f2694000000 ---p 00000000 00:00 0
7f2697a9c000-7f2697aa0000 r--p 00000000 fd:08 1457209 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDantzigPivot.cpython-36m-x86_64-linux-gnu.so
7f2697aa0000-7f2697aab000 r-xp 00004000 fd:08 1457209 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDantzigPivot.cpython-36m-x86_64-linux-gnu.so
7f2697aab000-7f2697aad000 r--p 0000f000 fd:08 1457209 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDantzigPivot.cpython-36m-x86_64-linux-gnu.so
7f2697aad000-7f2697aae000 ---p 00011000 fd:08 1457209 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDantzigPivot.cpython-36m-x86_64-linux-gnu.so
7f2697aae000-7f2697aaf000 r--p 00011000 fd:08 1457209 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDantzigPivot.cpython-36m-x86_64-linux-gnu.so
7f2697aaf000-7f2697ab0000 rw-p 00012000 fd:08 1457209 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDantzigPivot.cpython-36m-x86_64-linux-gnu.so
7f2697ab0000-7f2697ab1000 rw-p 00000000 00:00 0
7f2697ab1000-7f2697ab6000 r--p 00000000 fd:08 1457206 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyCoinMpsIO.cpython-36m-x86_64-linux-gnu.so
7f2697ab6000-7f2697ac0000 r-xp 00005000 fd:08 1457206 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyCoinMpsIO.cpython-36m-x86_64-linux-gnu.so
7f2697ac0000-7f2697ac3000 r--p 0000f000 fd:08 1457206 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyCoinMpsIO.cpython-36m-x86_64-linux-gnu.so
7f2697ac3000-7f2697ac4000 ---p 00012000 fd:08 1457206 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyCoinMpsIO.cpython-36m-x86_64-linux-gnu.so
7f2697ac4000-7f2697ac5000 r--p 00012000 fd:08 1457206 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyCoinMpsIO.cpython-36m-x86_64-linux-gnu.so
7f2697ac5000-7f2697ac7000 rw-p 00013000 fd:08 1457206 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyCoinMpsIO.cpython-36m-x86_64-linux-gnu.so
7f2697ac7000-7f2697acb000 r--p 00000000 fd:08 1457210 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDualPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697acb000-7f2697ad4000 r-xp 00004000 fd:08 1457210 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDualPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697ad4000-7f2697ad7000 r--p 0000d000 fd:08 1457210 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDualPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697ad7000-7f2697ad8000 r--p 0000f000 fd:08 1457210 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDualPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697ad8000-7f2697ad9000 rw-p 00010000 fd:08 1457210 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyDualPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697ad9000-7f2697add000 r--p 00000000 fd:08 1457214 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697add000-7f2697ae4000 r-xp 00004000 fd:08 1457214 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697ae4000-7f2697ae6000 r--p 0000b000 fd:08 1457214 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697ae6000-7f2697ae7000 r--p 0000c000 fd:08 1457214 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697ae7000-7f2697ae8000 rw-p 0000d000 fd:08 1457214 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyPivotPythonBase.cpython-36m-x86_64-linux-gnu.so
7f2697ae8000-7f2697aec000 r--p 00000000 fd:08 1457213 /conda/envs/notebook/lib/python3.6/site-packages/cylp/cy/CyPEPivot.cpython-36m-x86_64-linux-gnu.soAborted (core dumped)
```

Reproduce the crash with Python 3.6.13 by importing cylp.cy and constructing CyClpSimplex, then inspect the CyClpSimplex native extension using the provided backtrace. Trace the double-free or corruption report around IClpSimplex construction; done means the minimal reproduction no longer aborts and the regression is covered by an appropriate test.

Written by the indexing model from the issue text.