#13129: libSingular segmentation fault in factor
-----------------------+----------------------------------------------------
Reporter: vbraun | Owner: AlexGhitza
Type: defect | Status: new
Priority: major | Milestone: sage-5.1
Component: algebra | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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As reported on sage-support (https://groups.google.com/d/topic/sage-
support/03KsQOYOQOE/discussion):
{{{
sage: R.<t,x>=GF(2)['t,x']
sage: g=t^16*x + t^10*x + t^9*x + t^6*x + t^5 + t*x + x^2
sage: g.factor(proof=False)
Program received signal SIGSEGV, Segmentation fault.
CanonicalForm::operator= (this=0x2a9, cf=...) at cf_inline.cc:275
275 cf_inline.cc: No such file or directory.
in cf_inline.cc
Missing separate debuginfos, use: debuginfo-install
atlas-3.8.4-1.fc16.x86_64 boost-test-1.47.0-6.fc16.x86_64
expat-2.1.0-1.fc16.x86_64 fontconfig-2.8.0-4.fc16.x86_64
glibc-2.14.90-24.fc16.7.x86_64 keyutils-libs-1.5.2-1.fc16.x86_64
krb5-libs-1.9.3-2.fc16.x86_64 libcom_err-1.41.14-2.fc15.x86_64
libgcc-4.6.3-2.fc16.x86_64 libselinux-2.1.6-6.fc16.x86_64
libstdc++-4.6.3-2.fc16.x86_64 libuuid-2.20.1-2.3.fc16.x86_64 ncurses-
libs-5.9-2.20110716.fc16.x86_64 nss-softokn-freebl-3.13.4-1.fc16.x86_64
openssl-1.0.0j-1.fc16.x86_64
(gdb) bt
#0 CanonicalForm::operator= (this=0x2a9, cf=...) at cf_inline.cc:275
#1 0x00007fffd9c7a2ac in henselStep12 (F=..., factors=...,
bufFactors=...,
diophant=<optimized out>, M=..., Pi=..., j=31) at facHensel.cc:1960
#2 0x00007fffd9c7bfc0 in henselLift12 (F=..., factors=..., l=32, Pi=...,
diophant=..., M=..., sort=true) at facHensel.cc:2070
#3 0x00007fffd9c3579b in sieveSmallFactors (G=<optimized out>,
uniFactors=..., degPat=..., H=..., diophant=..., Pi=..., M=...,
success=@0x7fffffff9e6e, d=32) at facFqBivar.cc:3932
#4 0x00007fffd9c36211 in henselLiftAndLatticeRecombi (G=...,
uniFactors=<optimized out>, alpha=..., degPat=<optimized out>)
at facFqBivar.cc:4057
#5 0x00007fffd9c3f6bf in biFactorize (F=<optimized out>, info=...)
at facFqBivar.cc:5492
#6 0x00007fffd9bbebac in FpBiFactorize (G=<optimized out>) at
facFqBivar.h:253
#7 0x00007fffd9bb811f in FpFactorize (F=...) at facFqFactorize.h:101
#8 factorize (f=..., issqrfree=<optimized out>) at cf_factor.cc:561
#9 0x00007fffd9a2e60a in singclap_factorize (f=0x7fffd98623a0,
v=0x7fffffffbc40, with_exps=0) at clapsing.cc:829
#10 0x00007fffd9fcc9f9 in
__pyx_pf_4sage_5rings_10polynomial_28multi_polynomial_libsingular_23MPolynomial_libsingular_49factor
(__pyx_v_self=0x46b46e0,
__pyx_args=<optimized out>, __pyx_kwds=<optimized out>)
at sage/rings/polynomial/multi_polynomial_libsingular.cpp:25046
}}}
Looks like a Singular bug to me?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13129>
Sage <http://www.sagemath.org>
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