#11521: Memleak when resolving the action of Integers on an Elliptic Curve
------------------------+---------------------------------------------------
Reporter: jpflori | Owner: robertwb
Type: defect | Status: needs_info
Priority: major | Milestone: sage-4.8
Component: coercion | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
------------------------+---------------------------------------------------
Comment(by SimonKing):
FWIW:
With the latest patch, the tests in polynomial_singular_interface and in
multi_polynomial_ring pass.
There remain the following problems:
{{{
sage -t "devel/sage-main/sage/structure/parent.pyx"
**********************************************************************
File "/home/simon/SAGE/sage-4.8.alpha3/devel/sage-
main/sage/structure/parent.pyx", line 1410:
sage: n = 5; Hom(n,7)
Exception raised:
Traceback (most recent call last):
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/sagedoctest.py",
line 38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_33[4]>", line 1, in <module>
n = Integer(5); Hom(n,Integer(7))###line 1410:
sage: n = 5; Hom(n,7)
File "/home/simon/SAGE/sage-4.8.alpha3/local/lib/python/site-
packages/sage/categories/homset.py", line 159, in Hom
cache2 = _cache[X]
File
"/home/simon/SAGE/sage-4.8.alpha3/local/lib/python2.6/weakref.py", line
243, in __getitem__
return self.data[ref(key)]
TypeError: cannot create weak reference to
'sage.rings.integer.Integer' object
**********************************************************************
File "/home/simon/SAGE/sage-4.8.alpha3/devel/sage-
main/sage/structure/parent.pyx", line 1412:
sage: z=(2/3); Hom(z,8/1)
Exception raised:
Traceback (most recent call last):
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/sagedoctest.py",
line 38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_33[5]>", line 1, in <module>
z=(Integer(2)/Integer(3)); Hom(z,Integer(8)/Integer(1))###line
1412:
sage: z=(2/3); Hom(z,8/1)
File "/home/simon/SAGE/sage-4.8.alpha3/local/lib/python/site-
packages/sage/categories/homset.py", line 159, in Hom
cache2 = _cache[X]
File
"/home/simon/SAGE/sage-4.8.alpha3/local/lib/python2.6/weakref.py", line
243, in __getitem__
return self.data[ref(key)]
TypeError: cannot create weak reference to
'sage.rings.rational.Rational' object
**********************************************************************
1 items had failures:
2 of 8 in __main__.example_33
***Test Failed*** 2 failures.
For whitespace errors, see the file /home/simon/.sage//tmp/parent_2986.py
[11.6 s]
}}}
and
{{{
sage -t "devel/sage-main/sage/structure/category_object.pyx"
**********************************************************************
File "/home/simon/SAGE/sage-4.8.alpha3/devel/sage-
main/sage/structure/category_object.pyx", line 590:
sage: n = 5; Hom(n,7)
Exception raised:
Traceback (most recent call last):
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/sagedoctest.py",
line 38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_17[4]>", line 1, in <module>
n = Integer(5); Hom(n,Integer(7))###line 590:
sage: n = 5; Hom(n,7)
File "/home/simon/SAGE/sage-4.8.alpha3/local/lib/python/site-
packages/sage/categories/homset.py", line 159, in Hom
cache2 = _cache[X]
File
"/home/simon/SAGE/sage-4.8.alpha3/local/lib/python2.6/weakref.py", line
243, in __getitem__
return self.data[ref(key)]
TypeError: cannot create weak reference to
'sage.rings.integer.Integer' object
**********************************************************************
File "/home/simon/SAGE/sage-4.8.alpha3/devel/sage-
main/sage/structure/category_object.pyx", line 592:
sage: z=(2/3); Hom(z,8/1)
Exception raised:
Traceback (most recent call last):
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/sagedoctest.py",
line 38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_17[5]>", line 1, in <module>
z=(Integer(2)/Integer(3)); Hom(z,Integer(8)/Integer(1))###line
592:
sage: z=(2/3); Hom(z,8/1)
File "/home/simon/SAGE/sage-4.8.alpha3/local/lib/python/site-
packages/sage/categories/homset.py", line 159, in Hom
cache2 = _cache[X]
File
"/home/simon/SAGE/sage-4.8.alpha3/local/lib/python2.6/weakref.py", line
243, in __getitem__
return self.data[ref(key)]
TypeError: cannot create weak reference to
'sage.rings.rational.Rational' object
**********************************************************************
1 items had failures:
2 of 8 in __main__.example_17
***Test Failed*** 2 failures.
For whitespace errors, see the file
/home/simon/.sage//tmp/category_object_3050.py
[2.7 s]
}}}
and
{{{
sage -t "devel/sage-main/sage/structure/parent_base.pyx"
**********************************************************************
File "/home/simon/SAGE/sage-4.8.alpha3/devel/sage-
main/sage/structure/parent_base.pyx", line 108:
sage: n = 5; Hom(n,7)
Exception raised:
Traceback (most recent call last):
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/sagedoctest.py",
line 38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_3[4]>", line 1, in <module>
n = Integer(5); Hom(n,Integer(7))###line 108:
sage: n = 5; Hom(n,7)
File "/home/simon/SAGE/sage-4.8.alpha3/local/lib/python/site-
packages/sage/categories/homset.py", line 159, in Hom
cache2 = _cache[X]
File
"/home/simon/SAGE/sage-4.8.alpha3/local/lib/python2.6/weakref.py", line
243, in __getitem__
return self.data[ref(key)]
TypeError: cannot create weak reference to
'sage.rings.integer.Integer' object
**********************************************************************
File "/home/simon/SAGE/sage-4.8.alpha3/devel/sage-
main/sage/structure/parent_base.pyx", line 110:
sage: z=(2/3); Hom(z,8/1)
Exception raised:
Traceback (most recent call last):
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/sagedoctest.py",
line 38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/home/simon/SAGE/sage-4.8.alpha3/local/bin/ncadoctest.py",
line 1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_3[5]>", line 1, in <module>
z=(Integer(2)/Integer(3)); Hom(z,Integer(8)/Integer(1))###line
110:
sage: z=(2/3); Hom(z,8/1)
File "/home/simon/SAGE/sage-4.8.alpha3/local/lib/python/site-
packages/sage/categories/homset.py", line 159, in Hom
cache2 = _cache[X]
File
"/home/simon/SAGE/sage-4.8.alpha3/local/lib/python2.6/weakref.py", line
243, in __getitem__
return self.data[ref(key)]
TypeError: cannot create weak reference to
'sage.rings.rational.Rational' object
**********************************************************************
1 items had failures:
2 of 8 in __main__.example_3
***Test Failed*** 2 failures.
For whitespace errors, see the file
/home/simon/.sage//tmp/parent_base_3078.py
[2.6 s]
}}}
So, essentially this is just a single test that comes in two versions and
is repeated three times - and I would actually say that ''not'' raising an
error was a bug.
It seems that `Hom(1/2,2/3)` and similar nonsense is not used in Sage.
Hence, I think these tests should be removed. I'll ask sage-devel.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11521#comment:39>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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