#18979: avoid Maxima on creation of symbolic matrices
-------------------------------------+-------------------------------------
Reporter: rws | Owner:
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.9
Component: linear algebra | Resolution:
Keywords: | Merged in:
Authors: Ralf Stephan | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/rws/avoid_maxima_on_creation_of_symbolic_matrices|
75e679c687019c9657188003306bbd08314919a5
Dependencies: | Stopgaps:
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Comment (by rws):
Omitting the checks however makes hundreds of doctests fail with eg...
{{{
Failed example:
matrix(RR, 0, 2, []).columns()
Exception raised:
Traceback (most recent call last):
File "/home/ralf/sage/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 496, in _run
self.compile_and_execute(example, compiler, test.globs)
File "/home/ralf/sage/local/lib/python2.7/site-
packages/sage/doctest/forker.py", line 858, in compile_and_execute
exec(compiled, globs)
File "<doctest sage.matrix.matrix1.Matrix.columns[2]>", line 1, in
<module>
matrix(RR, Integer(0), Integer(2), []).columns()
File "/home/ralf/sage/local/lib/python2.7/site-
packages/sage/matrix/constructor.py", line 729, in _matrix_constructor
return matrix_space.MatrixSpace(ring, nrows, ncols,
sparse=sparse)(entries)
File "/home/ralf/sage/local/lib/python2.7/site-
packages/sage/matrix/matrix_space.py", line 482, in __call__
return self.matrix(entries, coerce, copy)
File "/home/ralf/sage/local/lib/python2.7/site-
packages/sage/matrix/matrix_space.py", line 1334, in matrix
return self.zero_matrix().__copy__()
File "sage/misc/cachefunc.pyx", line 2215, in
sage.misc.cachefunc.CachedMethodCallerNoArgs.__call__
(build/cythonized/sage/misc/cachefunc.c:13792)
self.cache = f(self._instance)
File "/home/ralf/sage/local/lib/python2.7/site-
packages/sage/matrix/matrix_space.py", line 1185, in zero_matrix
res = self.__matrix_class(self, 0, coerce=False, copy=False)
File "sage/matrix/matrix_generic_dense.pyx", line 118, in
sage.matrix.matrix_generic_dense.Matrix_generic_dense.__init__
(build/cythonized/sage/matrix/matrix_generic_dense.c:3057)
raise TypeError, "nonzero scalar matrix must be square"
TypeError: nonzero scalar matrix must be square
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/18979#comment:7>
Sage <http://www.sagemath.org>
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