segmentation fault with multivariate polynomial factorization

[zimmerma]

with Sage 4.8 I get:

sage: U.<x,y> = GF(2)[]  
sage: factor(x^6 + y^5 + x^5 + y^4,proof=False)
/usr/local/sage-4.8-linux-64bit-ubuntu_10.04.3_lts-x86_64-Linux/local/lib/libcsage.so(print_backtrace+0x31)[0x2b670685e3a3]
...

------------------------------------------------------------------------
Unhandled SIGSEGV: A segmentation fault occurred in Sage.
This probably occurred because a *compiled* component of Sage has a bug
in it and is not properly wrapped with sig_on(), sig_off(). You might
want to run Sage under gdb with 'sage -gdb' to debug this.
Sage will now terminate.
------------------------------------------------------------------------
local/bin/sage-sage: line 303:  7365 Segmentation fault      sage-ipython "$@" -i

[zimmerma]

reported upstream:  http://www.singular.uni-kl.de:8002/trac/ticket/425

[zimmerma]

fixed upstream. I asked if they plan a new release of Singular soon.

Paul

[zimmerma]

answer from the Singular developers: There will be a minor release 3-1-4-3 next week.

Paul

[zimmerma]

here is another test case which Seg. faults with Sage 5.0:

sage: U.<tt,xx> = GF(2)[]
sage: factor(xx^6 + tt^5 + tt^4 + tt*xx^3,proof=False)
...
Unhandled SIGSEGV: A segmentation fault occurred in Sage.

Paul

[jdemeyer]

Fixed by #13237.