#10608: Generating polynomial rings over matrices hangs
------------------------------+---------------------------------------------
Reporter: spancratz | Owner: was
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.6.2
Component: user interface | Keywords: matrix polynomial ring
Author: spancratz | Upstream: N/A
Reviewer: Aly Deines | Merged:
Work_issues: |
------------------------------+---------------------------------------------
Changes (by aly.deines):
* status: new => needs_work
* reviewer: => Aly Deines
Comment:
I got the following error on sage-4.6.1.rc1:
rlm-book:sage-4.6.1.rc1 aly$ ./sage -t
devel/sage/sage/matrix/matrix_space.py
sage -t "devel/sage/sage/matrix/matrix_space.py"
**********************************************************************
File
"/Users/aly/Desktop/sage-4.6.1.rc1/devel/sage/sage/matrix/matrix_space.py",
line 630:
sage: R.<x> = MS[]
Exception raised:
Traceback (most recent call last):
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/bin/ncadoctest.py",
line 1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/bin/sagedoctest.py",
line 38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/bin/ncadoctest.py",
line 1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_14[6]>", line 1, in <module>
R = MS['x']; (x,) = R._first_ngens(1)###line 630:
sage: R.<x> = MS[]
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/lib/python/site-
packages/sage/matrix/matrix_space.py", line 655, in __getitem__
P = PolynomialRing(self, x)
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/lib/python/site-
packages/sage/rings/polynomial/polynomial_ring_constructor.py", line 319,
in PolynomialRing
raise TypeError, 'base_ring must be a ring'
TypeError: base_ring must be a ring
**********************************************************************
File
"/Users/aly/Desktop/sage-4.6.1.rc1/devel/sage/sage/matrix/matrix_space.py",
line 640:
sage: MS[['t']]
Exception raised:
Traceback (most recent call last):
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/bin/ncadoctest.py",
line 1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/bin/sagedoctest.py",
line 38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/bin/ncadoctest.py",
line 1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_14[8]>", line 1, in <module>
MS[['t']]###line 640:
sage: MS[['t']]
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/lib/python/site-
packages/sage/matrix/matrix_space.py", line 682, in __getitem__
R = P(self, x)
File "/Users/aly/Desktop/sage-4.6.1.rc1/local/lib/python/site-
packages/sage/rings/power_series_ring.py", line 211, in PowerSeriesRing
raise TypeError, "base_ring must be a commutative ring"
TypeError: base_ring must be a commutative ring
**********************************************************************
1 items had failures:
2 of 9 in __main__.example_14
***Test Failed*** 2 failures.
For whitespace errors, see the file
/Users/aly/.sage//tmp/.doctest_matrix_space.py
[19.8 s]
----------------------------------------------------------------------
The following tests failed:
sage -t "devel/sage/sage/matrix/matrix_space.py"
Total time for all tests: 19.9 seconds
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10608#comment:1>
Sage <http://www.sagemath.org>
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