Calling all Singular experts:
On Cygwin, we see a strange error which includes both an overflow issue and
a pointer exception. Here is a typical example. Anyone have any idea what
is causing it? This is *not* #14254, unfortunately.
sage -t devel/sage-main/sage/algebras/free_algebra.py
Exception KeyError: (The ring pointer -0x1f5282c,) in
'sage.libs.singular.ring.singular_ring_delete' ignored
Exception KeyError: (The ring pointer -0x1f52768,) in
'sage.libs.singular.ring.singular_ring_delete' ignored
Exception KeyError: (The ring pointer -0x1f526a4,) in
'sage.libs.singular.ring.singular_ring_delete' ignored
**********************************************************************
File
"/home/sagetest/sage-5.8.beta4/devel/sage-main/sage/algebras/free_algebra.py",
line 820:
sage: G=A.g_algebra({y*x:-x*y})
Exception raised:
Traceback (most recent call last):
File "/home/sagetest/sage-5.8.beta4/local/bin/ncadoctest.py", line
1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/home/sagetest/sage-5.8.beta4/local/bin/sagedoctest.py", line
38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/home/sagetest/sage-5.8.beta4/local/bin/ncadoctest.py", line
1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_18[3]>", line 1, in <module>
G=A.g_algebra({y*x:-x*y})###line 820:
sage: G=A.g_algebra({y*x:-x*y})
File
"/home/sagetest/sage-5.8.beta4/local/lib/python/site-packages/sage/algebras/free_algebra.py",
line 872, in g_algebra
order=order, check=check)
File "factory.pyx", line 143, in
sage.structure.factory.UniqueFactory.__call__
(sage/structure/factory.c:1119)
File "factory.pyx", line 170, in
sage.structure.factory.UniqueFactory.get_object
(sage/structure/factory.c:1311)
File "plural.pyx", line 180, in
sage.rings.polynomial.plural.G_AlgFactory.create_object
(sage/rings/polynomial/plural.cpp:4289)
File "plural.pyx", line 358, in
sage.rings.polynomial.plural.NCPolynomialRing_plural.__init__
(sage/rings/polynomial/plural.cpp:5351)
File "plural.pyx", line 1471, in
sage.rings.polynomial.plural.NCPolynomial_plural.__richcmp__
(sage/rings/polynomial/plural.cpp:11452)
File "element.pyx", line 855, in
sage.structure.element.Element._richcmp (sage/structure/element.c:7980)
File "coerce.pyx", line 913, in
sage.structure.coerce.CoercionModel_cache_maps.canonical_coercion
(sage/structure/coerce.c:8304)
File "coerce.pyx", line 1068, in
sage.structure.coerce.CoercionModel_cache_maps.coercion_maps
(sage/structure/coerce.c:9855)
File "coerce.pyx", line 1209, in
sage.structure.coerce.CoercionModel_cache_maps.discover_coercion
(sage/structure/coerce.c:11405)
File "parent.pyx", line 2116, in
sage.structure.parent.Parent.coerce_map_from (sage/structure/parent.c:14383)
File "parent.pyx", line 2937, in sage.structure.parent._register_pair
(sage/structure/parent.c:21545)
File "parent.pyx", line 2911, in
sage.structure.parent.EltPair.__hash__ (sage/structure/parent.c:21193)
File "plural.pyx", line 573, in
sage.rings.polynomial.plural.NCPolynomialRing_plural.__hash__
(sage/rings/polynomial/plural.cpp:6487)
OverflowError: Python int too large to convert to C long
See http://trac.sagemath.org/sage_trac/ticket/14388. Thanks!
- kcrisman
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