#12020: major (BLOCKER!) bug probably in matrix_space.py
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Reporter: was | Owner: jason, was
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.8
Component: linear algebra | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by was):
I figured this out. This bug was introduced by #11589 (by Simon King and
Martin Albrecht). Basically the zero_matrix() method's code was
"mangled/changed" (?) when being copied into the __init__ method by
replacing "0" by "None". This breaks the code, since there is no reason
that None be coercible into a ring R, and I don't think that has to be
supported because, e.g., in Python {{{int(None)}}} is an error. Also,
this is a weird change since the zero_matrix method in the new code still
uses 0.
Patch coming up.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12020#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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