#9865: Unable to start singular because the command 'Singular -t --ticks-per-sec
1000' failed
-----------------------+----------------------------------------------------
Reporter: mpatel | Owner: mvngu
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.6
Component: doctest | Keywords: pexpect EOF crash exception
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
-----------------------+----------------------------------------------------
Changes (by leif):
* cc: AlexanderDreyer (added)
* keywords: => pexpect EOF crash exception
Comment:
Replying to [comment:8 leif]:
> lol, I've just built Sage 4.5.3 on the (single-core) Pentium 4 with 768
MB RAM, and it seems I now get doctest errors due to Singular crashing
while running {{{ptestlong}}} with two threads...
>
> More to come; the test is still running.
2 threads were perhaps too much for that old machine (CPU, not RAM),
though ''the build'' went fine with three jobs.
As reported by me on sage-release, {{{ptestlong}}} gave one timeout and
two doctest failures due to Singular having "crashed" (plus two
{{{NameError}}}s as a result of that):
{{{
sage -t -long
devel/sage/sage/rings/polynomial/multi_polynomial_element.py
**********************************************************************
File "/home/leif/Sage/sage-4.5.3/devel/sage-
main/sage/rings/polynomial/multi_polynomial_element.py", line 1513:
sage: M = f.lift(I)
Exception raised:
Traceback (most recent call last):
File "/home/leif/Sage/sage-4.5.3/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/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/local/bin/ncadoctest.py", line
1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_49[5]>", line 1, in <module>
M = f.lift(I)###line 1513:
sage: M = f.lift(I)
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/rings/polynomial/multi_polynomial_element.py", line 1519, in
lift
fs = self._singular_()
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/rings/polynomial/polynomial_singular_interface.py", line
347, in _singular_
return _singular_func(self, singular, have_ring)
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/rings/polynomial/polynomial_singular_interface.py", line
391, in _singular_func
self.parent()._singular_(singular).set_ring() #this is expensive
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/rings/polynomial/polynomial_singular_interface.py", line
195, in _singular_
return self._singular_init_(singular)
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/rings/polynomial/polynomial_singular_interface.py", line
236, in _singular_init_
self.__singular = singular.ring("(complex,%d,0,I)"%digits, _vars,
order=order, check=False)
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/interfaces/singular.py", line 890, in ring
self.eval(s)
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/interfaces/singular.py", line 546, in eval
s = Expect.eval(self, x, **kwds)
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/interfaces/expect.py", line 983, in eval
return '\n'.join([self._eval_line(L, **kwds) for L in
code.split('\n') if L != ''])
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/interfaces/expect.py", line 637, in _eval_line
self._start()
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/interfaces/singular.py", line 377, in _start
self.lib('general') # assumed loaded by misc/constants.py
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/interfaces/singular.py", line 703, in lib
self.eval('LIB "%s"'%lib)
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/interfaces/singular.py", line 546, in eval
s = Expect.eval(self, x, **kwds)
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/interfaces/expect.py", line 983, in eval
return '\n'.join([self._eval_line(L, **kwds) for L in
code.split('\n') if L != ''])
File "/home/leif/Sage/sage-4.5.3/local/lib/python/site-
packages/sage/interfaces/expect.py", line 668, in _eval_line
raise RuntimeError, "%s\n%s crashed executing %s"%(msg,self, line)
RuntimeError: End Of File (EOF) in read_nonblocking(). Exception style
platform.
<pexpect.spawn instance at 0xaf32c0c>
version: 2.0 ($Revision: 1.151 $)
command: /home/leif/Sage/sage-4.5.3/local/bin/Singular
args: ['/home/leif/Sage/sage-4.5.3/local/bin/Singular', '-t',
'--ticks-per-sec', '1000']
patterns:
>
buffer (last 100 chars):
before (last 100 chars): mmand(a), continue(c) or quit Singular(q)
?fatal flex scanner internal error--end of buffer missed
after: <class 'pexpect.EOF'>
match: None
match_index: None
exitstatus: None
flag_eof: 1
pid: 26203
child_fd: 4
timeout: None
delimiter: <class 'pexpect.EOF'>
logfile: None
maxread: 1000
searchwindowsize: None
delaybeforesend: 0
Singular crashed executing LIB "general.lib";
**********************************************************************
File "/home/leif/Sage/sage-4.5.3/devel/sage-
main/sage/rings/polynomial/multi_polynomial_element.py", line 1514:
sage: M
Exception raised:
Traceback (most recent call last):
File "/home/leif/Sage/sage-4.5.3/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/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/local/bin/ncadoctest.py", line
1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_49[6]>", line 1, in <module>
M###line 1514:
sage: M
NameError: name 'M' is not defined
**********************************************************************
File "/home/leif/Sage/sage-4.5.3/devel/sage-
main/sage/rings/polynomial/multi_polynomial_element.py", line 1516:
sage: sum( map( mul , zip( M, I.gens() ) ) ) == f
Exception raised:
Traceback (most recent call last):
File "/home/leif/Sage/sage-4.5.3/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/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/local/bin/ncadoctest.py", line
1172, in run_one_example
compileflags, 1) in test.globs
File "<doctest __main__.example_49[7]>", line 1, in <module>
sum( map( mul , zip( M, I.gens() ) ) ) == f###line 1516:
sage: sum( map( mul , zip( M, I.gens() ) ) ) == f
NameError: name 'M' is not defined
**********************************************************************
File "/home/leif/Sage/sage-4.5.3/devel/sage-
main/sage/rings/polynomial/multi_polynomial_element.py", line 1570:
sage: f.quo_rem(x)
Expected:
(x*y + 1.00000000000000, 1.00000000000000)
Got:
Singular crashed -- automatically restarting.
(x*y + 1.00000000000000, 1.00000000000000)
**********************************************************************
2 items had failures:
3 of 8 in __main__.example_49
1 of 5 in __main__.example_51
***Test Failed*** 4 failures.
For whitespace errors, see the file
/home/leif/.sage//tmp/.doctest_multi_polynomial_element.py
[45.9 s]
}}}
It's not that clear if the error is caused by Singular, pexpect or Sage's
Singular interface (or even the operating system, Ubuntu 7.10, kernel
2.6.22-16-generic).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9865#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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