#11379: Add Quantumino solver to sage/games
--------------------------------+-------------------------------------------
Reporter: slabbe | Owner: slabbe
Type: enhancement | Status: closed
Priority: major | Milestone: sage-4.7.2
Component: misc | Resolution: fixed
Keywords: sd31 | Work_issues:
Upstream: N/A | Reviewer: Rob Beezer
Author: Sébastien Labbé | Merged: sage-4.7.2.alpha2
Dependencies: |
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Comment(by fbissey):
Just a note from my testing of 4.7.2.alpha2. I have no problem on a
vanilla sage even with python 2.7 installed. However in sage-on-gentoo one
test is failing
{{{
.. NOTE::
The DLX solver throws a Segmentation Fault when the
number of rows is zero::
sage: from sage.combinat.matrices.dancing_links import
dlx_solver
sage: rows = []
sage: x = dlx_solver(rows)
sage: x.search() # not tested
BOOM !!!
}}}
sage-on-gentoo goes BOOM at
{{{
sage: x = dlx_solver(rows)
}}}
With a SIGABRT
{{{
sage: x = dlx_solver(rows)
python2.7: sage/combinat/matrices/dancing_links_c.h:217: void
dancing_links::setup_columns(): Assertion `nr_columns > 0' failed.
/usr/lib64/libcsage.so(print_backtrace+0x24)[0x7fea73a945f7]
/usr/lib64/libcsage.so(sigdie+0x1d)[0x7fea73a94687]
/usr/lib64/libcsage.so(sage_signal_handler+0x157)[0x7fea73a94822]
/lib64/libpthread.so.0(+0xfee0)[0x7fea79206ee0]
/lib64/libc.so.6(gsignal+0x35)[0x7fea78ea5ee5]
/lib64/libc.so.6(abort+0x186)[0x7fea78ea7896]
/lib64/libc.so.6(__assert_fail+0xf5)[0x7fea78e9e7a5]
/usr/lib64/python2.7/site-
packages/sage/combinat/matrices/dancing_links.so(+0x855d)[0x7fea4e73255d]
}}}
while normal sage goes BOOM in the next not tested bit with a SIGSEGV
{{{
sage: x = dlx_solver(rows)
sage: x.search()
/home/work/fbissey/sandbox/sage-4.7.2.alpha2/local/lib/libcsage.so(print_backtrace+0x31)[0x7fe2bbd11e65]
/home/work/fbissey/sandbox/sage-4.7.2.alpha2/local/lib/libcsage.so(sigdie+0x14)[0x7fe2bbd11e97]
/home/work/fbissey/sandbox/sage-4.7.2.alpha2/local/lib/libcsage.so(sage_signal_handler+0x20e)[0x7fe2bbd11ae4]
/lib64/libpthread.so.0(+0xfee0)[0x7fe2c0fc5ee0]
/home/work/fbissey/sandbox/sage-4.7.2.alpha2/local/lib/python2.7/site-
packages/sage/combinat/matrices/dancing_links.so(+0x847d)[0x7fe29b0c547d]
}}}
We go BOOM in sage-on-gentoo for the reason stated in the notes (0 rows).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11379#comment:37>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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