A simple funny bug in Sagemath

[YuFei Duan]

If I running 3 lines codes below:

PR.<x,y> = PolynomialRing(Zmod(0x10001))

f = (x + y) ^ 3

print(f.factor())

sagemath will crash:

------------------------------------------------------------------------ Unhandled SIGSEGV: A segmentation fault occurred. This probably occurred because a *compiled* module has a bug in it and is not properly wrapped with sig_on(), sig_off(). Python will now terminate. ------------------------------------------------------------------------ /opt/sagemath-9.2/src/bin/sage-python: line 2: 1044 Segmentation fault (core dumped) sage -python "$@"

[Eric Gourgoulhon]

Hi,

It works for me with SageMath 9.4. Maybe you should upgrade to that version (the last stable one).

Eric.

[Emmanuel Charpentier]

WorksForMe(TM) in 9.5.beta7.

[William Stein]

I can confirm that this is broken in sage-9.2, but it works fine in sage-9.3.  You should upgrade.

On Cocalc.com we keep a couple of older versions of Sage around:

~/cocalc/src/packages/next/components/account/config$ sage-.[tab]
sage-9.1  sage-9.2  sage-9.3  sage-9.4  

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William (http://wstein.org)

[YuFei Duan]

thanks guys, I had upgraded sage to 9.3 yesterday. And it is really a funny bug :)

William Stein <wst...@gmail.com> 于2021年12月8日周三 00:56写道：

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