#8772: Maxima interface chokes randomly
--------------------------+-------------------------------------------------
Reporter: dunfield | Owner: was
Type: defect | Status: new
Priority: critical | Milestone: sage-4.5.3
Component: interfaces | Keywords: Maxima
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
--------------------------+-------------------------------------------------
Comment(by leif):
Replying to [comment:7 leif]:
> Doctesting in parallel with 32 threads ({{{ptestlong}}}) btw. gave no
errors. I'll have to inspect the log of the run with 64 threads, but IIRC
there was only one "intentional" timeout due to SIGALARM set to 1
second...
Not really (the run with 64 threads):
{{{
...
----------------------------------------------------------------------
The following tests failed:
sage -t -long devel/sage/sage/interfaces/expect.py # 1 doctests
failed
sage -t -long devel/sage/sage/symbolic/expression.pyx # 1
doctests failed
sage -t -long devel/sage/sage/schemes/elliptic_curves/heegner.py
# 1 doctests failed
----------------------------------------------------------------------
Total time for all tests: 1799.8 seconds
}}}
The failing tests:
{{{
sage -t -long devel/sage/sage/interfaces/expect.py
**********************************************************************
File "/home/leif/Sage/sage-4.5.3.rc0/devel/sage-
main/sage/interfaces/expect.py", line 808:
sage: print sage0.eval("alarm(1); singular._expect_expr('1')")
Expected:
Control-C pressed. Interrupting Singular. Please wait a few
seconds...
...
KeyboardInterrupt: computation timed out because alarm was set for 1
seconds
Got:
---------------------------------------------------------------------------
KeyboardInterrupt Traceback (most recent call
last)
<BLANKLINE>
/home/leif/Sage/sage-4.5.3.rc0/data/extcode/sage/<ipython console> in
<module>()
<BLANKLINE>
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/interfaces/expect.pyc in _expect_expr(self, expr, timeout)
815 expr = self._prompt_wait
816 if self._expect is None:
--> 817 self._start()
818 try:
819 if timeout:
<BLANKLINE>
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/interfaces/singular.pyc in _start(self, alt_message)
373 """
374 self.__libs = []
--> 375 Expect._start(self, alt_message)
376 # Load some standard libraries.
377 self.lib('general') # assumed loaded by
misc/constants.py
<BLANKLINE>
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/interfaces/expect.pyc in _start(self, alt_message,
block_during_init)
449 self._expect = pexpect.spawn(cmd,
logfile=self.__logfile)
450 if self._do_cleaner():
--> 451 cleaner.cleaner(self._expect.pid, cmd)
452
453 except (ExceptionPexpect, pexpect.EOF, IndexError):
<BLANKLINE>
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/interfaces/cleaner.pyc in cleaner(pid, cmd)
30 o.write('%s %s\n'%(pid, cmd))
31 o.close()
---> 32 start_cleaner_if_not_running()
33
34 ################
<BLANKLINE>
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/interfaces/cleaner.pyc in start_cleaner_if_not_running()
41 return
42 except (IOError, OSError, ValueError):
---> 43 os.system('sage-cleaner &') # it has died
44
45
<BLANKLINE>
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/misc/misc.pyc in __mysig(a, b)
1695 __alarm_time=0
1696 def __mysig(a,b):
-> 1697 raise KeyboardInterrupt, "computation timed out because
alarm was set for %s seconds"%__alarm_time
1698
1699 def alarm(seconds):
<BLANKLINE>
KeyboardInterrupt: computation timed out because alarm was set for 1
seconds
**********************************************************************
1 items had failures:
1 of 10 in __main__.example_15
***Test Failed*** 1 failures.
For whitespace errors, see the file
/home/leif/.sage//tmp/.doctest_expect.py
[101.9 s]
}}}
(I think this is ok, as mentioned.)
{{{
sage -t -long devel/sage/sage/symbolic/expression.pyx
**********************************************************************
File "/home/leif/Sage/sage-4.5.3.rc0/devel/sage-
main/sage/symbolic/expression.pyx", line 1146:
sage: (x > 2).assume()
Expected nothing
Got:
Maxima crashed -- automatically restarting.
**********************************************************************
1 items had failures:
1 of 15 in __main__.example_36
***Test Failed*** 1 failures.
For whitespace errors, see the file
/home/leif/.sage//tmp/.doctest_expression.py
[564.5 s]
}}}
This might also simply be a timeout.
{{{
sage -t -long devel/sage/sage/schemes/elliptic_curves/heegner.py
**********************************************************************
File "/home/leif/Sage/sage-4.5.3.rc0/devel/sage-
main/sage/schemes/elliptic_curves/heegner.py", line 6946:
sage: QQ[sqrt(-195)].class_number()
Exception raised:
Traceback (most recent call last):
File "/home/leif/Sage/sage-4.5.3.rc0/local/bin/ncadoctest.py", line
1231, in run_one_test
self.run_one_example(test, example, filename, compileflags)
File "/home/leif/Sage/sage-4.5.3.rc0/local/bin/sagedoctest.py", line
38, in run_one_example
OrigDocTestRunner.run_one_example(self, test, example, filename,
compileflags)
File "/home/leif/Sage/sage-4.5.3.rc0/local/bin/ncadoctest.py", line
1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_235[7]>", line 1, in <module>
QQ[sqrt(-Integer(195))].class_number()###line 6946:
sage: QQ[sqrt(-195)].class_number()
File "ring.pyx", line 205, in sage.rings.ring.Ring.__getitem__
(sage/rings/ring.c:2556)
File "/home/leif/Sage/sage-4.5.3.rc0/local/lib/python/site-
packages/sage/rings/polynomial/polynomial_ring_constructor.py", line 343,
in PolynomialRing
R = _single_variate(base_ring, name, sparse, implementation)
File "/home/leif/Sage/sage-4.5.3.rc0/local/lib/python/site-
packages/sage/rings/polynomial/polynomial_ring_constructor.py", line 395,
in _single_variate
name = normalize_names(1, name)
File "parent_gens.pyx", line 204, in
sage.structure.parent_gens.normalize_names
(sage/structure/parent_gens.c:2093)
File "parent_gens.pyx", line 145, in
sage.structure.parent_gens._certify_names
(sage/structure/parent_gens.c:1650)
ValueError: variable names must be alphanumeric, but one is
'sqrt(-195)' which is not.
**********************************************************************
1 items had failures:
1 of 11 in __main__.example_235
***Test Failed*** 1 failures.
For whitespace errors, see the file
/home/leif/.sage//tmp/.doctest_heegner.py
[1178.8 s]
}}}
No idea. I get the same error if I just type that line in Sage. Doctesting
the file succeeds...
Oh wait, that was the Sage session that gave the Maxima error! After
restarting Sage, I get the expected result:
{{{
...
TypeError: Error executing code in Maxima
CODE:
sage75684 : ((a)+(-1))*((a)^(-1))$
Maxima ERROR:
Incorrect syntax: Illegal use of delimiter )
(%i529800) Incorrect syntax: Premature termination of input at $.
(%i529801)
sage:
sage:
sage: QQ[sqrt(-195)].class_number()
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
/home/leif/Sage/sage-4.5.3.rc0/<ipython console> in <module>()
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/rings/ring.so in sage.rings.ring.Ring.__getitem__
(sage/rings/ring.c:2556)()
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/rings/polynomial/polynomial_ring_constructor.pyc in
PolynomialRing(base_ring, arg1, arg2, sparse, order, names, name,
implementation)
341 raise TypeError, "if second arguments is a string
with no commas, then there must be no other non-optional arguments"
342 name = arg1
--> 343 R = _single_variate(base_ring, name, sparse,
implementation)
344 else:
345 # 2-4. PolynomialRing(base_ring, names,
order='degrevlex'):
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/rings/polynomial/polynomial_ring_constructor.pyc in
_single_variate(base_ring, name, sparse, implementation)
393 def _single_variate(base_ring, name, sparse, implementation):
394 import sage.rings.polynomial.polynomial_ring as m
--> 395 name = normalize_names(1, name)
396 key = (base_ring, name, sparse, implementation)
397 R = _get_from_cache(key)
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/structure/parent_gens.so in
sage.structure.parent_gens.normalize_names
(sage/structure/parent_gens.c:2093)()
/home/leif/Sage/sage-4.5.3.rc0/local/lib/python2.6/site-
packages/sage/structure/parent_gens.so in
sage.structure.parent_gens._certify_names
(sage/structure/parent_gens.c:1650)()
ValueError: variable names must be alphanumeric, but one is 'sqrt(-195)'
which is not.
sage:
Exiting Sage (CPU time 1m33.85s, Wall time 1921m38.11s).
Exiting spawned Maxima process.
l...@quadriga:~/Sage/sage-4.5.3.rc0$ ./sage
----------------------------------------------------------------------
| Sage Version 4.5.3.rc0, Release Date: 2010-08-30 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
**********************************************************************
* *
* Warning: this is a prerelease version, and it may be unstable. *
* *
**********************************************************************
sage: QQ[sqrt(-195)].class_number()
4
sage:
}}}
(I exited Sage as usual - with Control-D; just in case you wonder.)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8772#comment:8>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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