#8276: Make the one(), identity_matrix() and zero_matrix() cached and immutable.
------------------------------+---------------------------------------------
Reporter: hivert | Owner: hivert
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.3.3
Component: linear algebra | Keywords: One mutable.
Author: Florent Hivert | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by rossk):
Used the new patches (as well as trac_8294-matrix_2x2_copy_mutability_fix-
fh.patch). All were applied and compiled with no errors.
{{{
The following tests failed:
sage -t
devel/sage/sage/groups/abelian_gps/dual_abelian_group_element.py #
Segfault
sage -t devel/sage/sage/matrix/matrix_integer_2x2.pyx # 1
doctests failed
sage -t devel/sage/doc/fr/tutorial/programming.rst # Segfault
}}}
Re-tested each and got the following for the first 2 (but the 3rd one
passed).
{{{
A mysterious error (perhaps a memory error?) occurred, which may have
crashed doctest.
}}}
I get this "mysterious error" a number of times and have seen many tickets
mention it. Can anyone give any advice about it? Given its not always
reproduceable, should it block a positive review if the tickets
functionality proves good?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8276#comment:15>
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