I now have repro steps that do not require SnapPy at all:
Rx = PolynomialRing(RationalField(), 'x')
R = PolynomialRing(Rx, 'y')
R('-y^2 + x^2 - x + 1').resultant(R('(2*x - 1)*y'))
On Saturday, January 29, 2022 at 11:19:38 PM UTC-8 Matthias Goerner wrote:
> I am getting a crash when I am running SnapPy's
> https://github.com/3-manifolds/SnapPy test suite against SageMath with
> the stack trace below.
> I created several different conda environments, all with python 3.9.9, on
> Mac OS 11.5.2 x86_64 and it seems to be related to the (cy)pari version.
> That is, I can fix the crash or recreate the crash by changing the
> environment with "conda install pari==2.11.4" or "conda install 2.13.2".
> Those commands change the packages as follows:
>
> added / updated specs:
> - pari==2.11.4
>
>
> The following packages will be DOWNGRADED:
>
> cypari2 2.1.2-py39hbeebeb8_3 -->
> 2.1.2-py39he58a9ab_0
> cysignals 1.11.2-py39h7972417_0 -->
> 1.10.3-py39h520947a_0
> eclib 20210503-h06317ce_2 -->
> 20210503-h5af3530_0
> giac 1.6.0.47-h3e19eb6_2 -->
> 1.6.0.47-h5514456_0
> lcalc 1.23-he3dd645_1006 -->
> 1.23-h3e22c04_1004
> pari 2.13.2-h491590d_1_pthread -->
> 2.11.4-h797e938_2
> sagelib 9.3-py39hf07016b_5 -->
> 9.3-py39h2a6771f_4
>
> l also tried Marc Culler's Sage releases (
> https://github.com/3-manifolds/Sage_macOS/releases), version 9.4 and 9.5
> prerelease. The crash didn't happen in either version. I think those use
> pari 2.13.1 and 2.13.3.
>
> Hmmm... I noted that the downgrading that fixed the crash removed
> "_pthread" from the pari version. So maybe pthread support causes the crash.
>
> Here is the stacktrace:
>
> * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
> * frame #0: 0x00007fff203b84c2 libsystem_kernel.dylib`__kill + 10
> frame #1: 0x000000010ffd40ac libpari-gmp-tls.dylib`pari_err + 4940
> frame #2: 0x000000010fca26ec libpari-gmp-tls.dylib`_gtopoly + 172
> frame #3: 0x00000001169ec422
> gen.cpython-39-darwin.so`__pyx_pf_7cypari2_3gen_8Gen_base_14Polrev
> + 178
> frame #4: 0x000000010f7b450c
> signals.cpython-39-darwin.so`__Pyx_CyFunction_CallAsMethod
> + 92
> frame #5: 0x0000000118534c77
> polynomial_element.cpython-39-darwin.so`__Pyx_PyObject_Call2Args
> + 215
> frame #6: 0x00000001185972cf
> polynomial_element.cpython-39-darwin.so`__pyx_pw_4sage_5rings_10polynomial_18polynomial_element_10Polynomial_221_pari_with_name
>
> + 1071
> frame #7: 0x000000010f0b1f24 python`cfunction_call + 52
> frame #8: 0x0000000118534ea3
> polynomial_element.cpython-39-darwin.so`__Pyx_PyObject_CallOneArg
> + 339
> frame #9: 0x00000001185967a2
> polynomial_element.cpython-39-darwin.so`__pyx_pw_4sage_5rings_10polynomial_18polynomial_element_10Polynomial_217__pari__
>
> + 386
> frame #10: 0x0000000118535904
> polynomial_element.cpython-39-darwin.so`__Pyx_PyObject_CallNoArg
> + 132
> frame #11: 0x0000000118598497
> polynomial_element.cpython-39-darwin.so`__pyx_pw_4sage_5rings_10polynomial_18polynomial_element_10Polynomial_231resultant
>
> + 551
> frame #12: 0x000000010f060bd5 python`method_vectorcall_O + 117
> frame #13: 0x00000001108491d4
> element.cpython-39-darwin.so`__pyx_pw_4sage_9structure_7element_12coerce_binop_1new_method
>
> + 1208
> frame #14: 0x000000010f051288 python`_PyObject_MakeTpCall + 136
> frame #15: 0x000000010f055d9e python`method_vectorcall + 686
> frame #16: 0x000000010f186e4f python`call_function + 175
> frame #17: 0x000000010f184940 python`_PyEval_EvalFrameDefault + 44816
> frame #18: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #19: 0x000000010f05272b python`_PyFunction_Vectorcall + 427
> frame #20: 0x000000010f186e4f python`call_function + 175
> frame #21: 0x000000010f184972 python`_PyEval_EvalFrameDefault + 44866
> frame #22: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #23: 0x000000010f05272b python`_PyFunction_Vectorcall + 427
> frame #24: 0x000000010f186e4f python`call_function + 175
> frame #25: 0x000000010f184972 python`_PyEval_EvalFrameDefault + 44866
> frame #26: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #27: 0x000000010f05272b python`_PyFunction_Vectorcall + 427
> frame #28: 0x000000010f186e4f python`call_function + 175
> frame #29: 0x000000010f184972 python`_PyEval_EvalFrameDefault + 44866
> frame #30: 0x000000010f052672 python`_PyFunction_Vectorcall + 242
> frame #31: 0x000000010f186e4f python`call_function + 175
> frame #32: 0x000000010f184972 python`_PyEval_EvalFrameDefault + 44866
> frame #33: 0x000000010f052672 python`_PyFunction_Vectorcall + 242
> frame #34: 0x000000010f186e4f python`call_function + 175
> frame #35: 0x000000010f184972 python`_PyEval_EvalFrameDefault + 44866
> frame #36: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #37: 0x000000010f05272b python`_PyFunction_Vectorcall + 427
> frame #38: 0x000000010f186e4f python`call_function + 175
> frame #39: 0x000000010f184a2b python`_PyEval_EvalFrameDefault + 45051
> frame #40: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #41: 0x000000010f05272b python`_PyFunction_Vectorcall + 427
> frame #42: 0x000000010f055b8e python`method_vectorcall + 158
> frame #43: 0x000000010f186e4f python`call_function + 175
> frame #44: 0x000000010f184a2b python`_PyEval_EvalFrameDefault + 45051
> frame #45: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #46: 0x000000010f1722c3 python`builtin_exec + 371
> frame #47: 0x000000010f0b2473 python`cfunction_vectorcall_FASTCALL + 99
> frame #48: 0x000000010f186e4f python`call_function + 175
> frame #49: 0x000000010f184972 python`_PyEval_EvalFrameDefault + 44866
> frame #50: 0x000000010f052672 python`_PyFunction_Vectorcall + 242
> frame #51: 0x000000010f186e4f python`call_function + 175
> frame #52: 0x000000010f18489e python`_PyEval_EvalFrameDefault + 44654
> frame #53: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #54: 0x000000010f05272b python`_PyFunction_Vectorcall + 427
> frame #55: 0x000000010f186e4f python`call_function + 175
> frame #56: 0x000000010f18489e python`_PyEval_EvalFrameDefault + 44654
> frame #57: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #58: 0x000000010f05272b python`_PyFunction_Vectorcall + 427
> frame #59: 0x000000010f186e4f python`call_function + 175
> frame #60: 0x000000010f184972 python`_PyEval_EvalFrameDefault + 44866
> frame #61: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #62: 0x000000010f05272b python`_PyFunction_Vectorcall + 427
> frame #63: 0x000000010f186e4f python`call_function + 175
> frame #64: 0x000000010f184a2b python`_PyEval_EvalFrameDefault + 45051
> frame #65: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #66: 0x000000010f05272b python`_PyFunction_Vectorcall + 427
> frame #67: 0x000000010f186e4f python`call_function + 175
> frame #68: 0x000000010f184a2b python`_PyEval_EvalFrameDefault + 45051
> frame #69: 0x000000010f052672 python`_PyFunction_Vectorcall + 242
> frame #70: 0x000000010f186e4f python`call_function + 175
> frame #71: 0x000000010f184972 python`_PyEval_EvalFrameDefault + 44866
> frame #72: 0x000000010f1781e4 python`_PyEval_EvalCode + 548
> frame #73: 0x000000010f1eb463 python`PyRun_FileExFlags + 403
> frame #74: 0x000000010f1eac0d python`PyRun_SimpleFileExFlags + 525
> frame #75: 0x000000010f216279 python`pymain_run_file + 329
> frame #76: 0x000000010f215960 python`pymain_run_python + 992
> frame #77: 0x000000010f215525 python`Py_RunMain + 37
> frame #78: 0x000000010f216c91 python`pymain_main + 49
> frame #79: 0x000000010efdd388 python`main + 56
> frame #80: 0x00007fff20402f3d libdyld.dylib`start + 1
>
>
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