Re: [sage-devel] ValueError: filedescriptor out of range in select()
On Sun, Mar 3, 2019 at 11:52 AM Jeroen Demeyer wrote: > > On 2019-03-03 11:48, Vincent Delecroix wrote: > > Is this supposed to crash Sage? > > OK, I missed that part. The fact that you run out of file descriptors is > not a bug, but the fact that it crashes Sage is a bug. I'm not sure I'd even call that a bug, so long as it crashes "cleanly" (provides a relevant traceback and a non-zero exit code). Running out of file descriptors is a pretty extreme condition and possible that even just in the course of trying to do something like write to a log file or a dup a file descriptor for some reason (there is all kinds of I/O magic that goes into making a complex REPL like IPython work, for example) you could then bring down the interpreter. At most I'd say maybe the Expect interfaces could handle this type of error better. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] ValueError: filedescriptor out of range in select()
On Sunday, March 3, 2019 at 1:09:45 PM UTC+1, Jeroen Demeyer wrote:
> What is it that you're *actually* trying to do?
>
Use the gp code by Denis Simon in
/src/ext/pari/simon
didnt know how to feed that to pari, so I used gp. And that is what I saw in
schemes/elliptic_curves/gp_simon.py:gp.read("resultant3.gp")
as well.
--
You received this message because you are subscribed to the Google Groups
"sage-devel" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to sage-devel+unsubscr...@googlegroups.com.
To post to this group, send email to sage-devel@googlegroups.com.
Visit this group at https://groups.google.com/group/sage-devel.
For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] ValueError: filedescriptor out of range in select()
On Sunday, March 3, 2019 at 12:50:42 PM UTC+1, Jeroen Demeyer wrote:
> But maybe it's not closed *immediately*. It would be interesting to do
> the same experiment with a time.sleep(0.1) or a gc.collect() in the loop.
>
I tried that
sage: for k in range(1):
: gp = Gp()
: gp.read(SAGE_EXTCODE + "/pari/simon/qfsolve.gp")
: k
: if k % 1000 == 0:
: gc.collect()
And indeed this time it worked for the first 3266 loops (instead of just
1800) and then sage crashes with
OSError Traceback (most recent call last)
in ()
1 for k in range(Integer(1)):
2 gp = Gp()
> 3 gp.read(SAGE_EXTCODE + "/pari/simon/qfsolve.gp")
4 k
5 if k % Integer(1000) == Integer(0):
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/interface
.pyc in read(self, filename)
222 sage: os.unlink(filename)
223 """
--> 224 self.eval(self._read_in_file_command(filename))
225
226 def _read_in_file_command(self, filename):
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in eval(self, code, strip, synchronize, locals, allow_use_file,
split_lines, **kwds)
1349 elif split_lines:
1350 return '\n'.join([self._eval_line(L,
allow_use_file=allow_use_file, **kwds)
-> 1351 for L in code.split('\n')
if L != ''])
1352 else:
1353 return self._eval_line(code,
allow_use_file=allow_use_file, **kwds)
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc
in _eval_line(self, line, allow_use_file, wait_for_prompt,
restart_if_needed)
443 a = Expect._eval_line(self, line,
444 allow_use_file=allow_use_file,
--> 445 wait_for_prompt=wait_for_prompt)
446 if a.find("the PARI stack overflows") != -1:
447 verbose("automatically doubling the PARI stack and
re-executing
current input line")
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in _eval_line(self, line, allow_use_file, wait_for_prompt,
restart_if_needed)
914 try:
915 if self._expect is None:
--> 916 self._start()
917 E = self._expect
918 try:
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc
in _start(self, alt_message, block_during_init)
241
242 def _start(self, alt_message=None, block_during_init=True):
--> 243 Expect._start(self, alt_message, block_during_init)
244 # disable memory debugging: those warnings can only confuse
our
245 # interface
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in _start(self, alt_message, block_during_init)
501 # Work around
https://bugs.python.org/issue1652
502 preexec_fn=lambda:
signal.signal(signal.SIGPIPE, signal.SIG_DFL),
--> 503 quit_string=self._quit_string())
504 except (ExceptionPexpect, pexpect.EOF) as e:
505 # Change pexpect errors to RuntimeError
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/sagespawn.pyx
in sage.interfaces.sagespawn.SageSpawn.__init__
(build/cythonized/sage/interfaces/sagespawn.c:1948)()
63 kwds.setdefault("maxread", 4194304)
64
---> 65 with ContainChildren(silent=True):
66 spawn.__init__(self, *args, **kwds)
67
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/sagespawn.pyx
in sage.interfaces.sagespawn.SageSpawn.__init__
(build/cythonized/sage/interfaces/sagespawn.c:1902)()
64
65 with ContainChildren(silent=True):
---> 66 spawn.__init__(self, *args, **kwds)
67
68 self.delaybeforesend = None
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/pty_spawn.pyc in
__init__(self, command, args, timeout, maxread, searchwindowsize, logfile,
cwd, env, ignore_sighup, echo, preexec_fn, encoding, codec_errors,
dimensions, use_poll)
202 self.name = ''
203 else:
--> 204 self._spawn(command, args, preexec_fn, dimensions)
205 self.use_poll = use_poll
206
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/pty_spawn.pyc in
_spawn(self, command, args, preexec_fn, dimensions)
301
302 self.ptyproc = self._spawnpty(self.args, env=self.env,
--> 303 cwd=self.cwd, **kwargs)
304
305 self.pid = self.ptyproc.pid
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/sagespawn.pyx
in sage.interfaces.sagespawn.SageSp
Re: [sage-devel] ValueError: filedescriptor out of range in select()
On 2019-03-03 12:46, Simon Brandhorst wrote: Shouldn't the gp session be closed afterwards? After all it is not used/referenced anymore? So that the file descriptor gets freed again? If not what is the recommended way to start computations in gp The recommended way is not to use the GP pexpect interface at all but use the PARI library interface accessed by the "pari" object. What is it that you're *actually* trying to do? -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] ValueError: filedescriptor out of range in select()
On 2019-03-03 12:46, Simon Brandhorst wrote: Shouldn't the gp session be closed afterwards? After all it is not used/referenced anymore? But maybe it's not closed *immediately*. It would be interesting to do the same experiment with a time.sleep(0.1) or a gc.collect() in the loop. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] ValueError: filedescriptor out of range in select()
Shouldn't the gp session be closed afterwards? After all it is not used/referenced anymore? So that the file descriptor gets freed again? If not what is the recommended way to start computations in gp (or gap/magma )? Say in some method in some class? give it some global gp instance as a parameter? Is there such a thing? On Sunday, March 3, 2019 at 11:47:02 AM UTC+1, Jeroen Demeyer wrote: > > On 2019-03-03 11:43, Vincent Delecroix wrote: > > Could you open a trac ticket? This is definitely a bug > > (most probably in `interfaces/expect.py`). > > I wouldn't call it a bug. You're opening 1 independent GP sessions, > which each need a few file descriptors. It's normal that you run out of > file descriptors after a while. > > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] ValueError: filedescriptor out of range in select()
On 2019-03-03 11:48, Vincent Delecroix wrote: Is this supposed to crash Sage? OK, I missed that part. The fact that you run out of file descriptors is not a bug, but the fact that it crashes Sage is a bug. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] ValueError: filedescriptor out of range in select()
Le 03/03/2019 à 11:46, Jeroen Demeyer a écrit : On 2019-03-03 11:43, Vincent Delecroix wrote: Could you open a trac ticket? This is definitely a bug (most probably in `interfaces/expect.py`). I wouldn't call it a bug. You're opening 1 independent GP sessions, which each need a few file descriptors. It's normal that you run out of file descriptors after a while. Is this supposed to crash Sage? -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] ValueError: filedescriptor out of range in select()
On 2019-03-03 11:43, Vincent Delecroix wrote: Could you open a trac ticket? This is definitely a bug (most probably in `interfaces/expect.py`). I wouldn't call it a bug. You're opening 1 independent GP sessions, which each need a few file descriptors. It's normal that you run out of file descriptors after a while. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
Re: [sage-devel] ValueError: filedescriptor out of range in select()
Could you open a trac ticket? This is definitely a bug
(most probably in `interfaces/expect.py`).
Le 03/03/2019 à 11:41, Simon Brandhorst a écrit :
Trying to provoke more errors:
sage: from sage.env import SAGE_EXTCODE
sage: for k in range(1):
: gp = Gp()
: gp.read(SAGE_EXTCODE + "/pari/simon/qfsolve.gp")
: k
breaks at k = 1922 with
-
OSError Traceback (most recent call last)
in ()
1 for k in range(Integer(1)):
2 gp = Gp()
> 3 gp.read(SAGE_EXTCODE + "/pari/simon/qfsolve.gp")
4 k
5
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/interface.pyc
in read(self, filename)
222 sage: os.unlink(filename)
223 """
--> 224 self.eval(self._read_in_file_command(filename))
225
226 def _read_in_file_command(self, filename):
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in eval(self, code, strip, synchronize, locals, allow_use_file,
split_lines, **kwds)
1349 elif split_lines:
1350 return '\n'.join([self._eval_line(L,
allow_use_file=allow_use_file, **kwds)
-> 1351 for L in code.split('\n')
if L != ''])
1352 else:
1353 return self._eval_line(code,
allow_use_file=allow_use_file, **kwds)
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc
in _eval_line(self, line, allow_use_file, wait_for_prompt,
restart_if_needed)
443 a = Expect._eval_line(self, line,
444 allow_use_file=allow_use_file,
--> 445 wait_for_prompt=wait_for_prompt)
446 if a.find("the PARI stack overflows") != -1:
447 verbose("automatically doubling the PARI stack and
re-executing current input line")
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in _eval_line(self, line, allow_use_file, wait_for_prompt,
restart_if_needed)
914 try:
915 if self._expect is None:
--> 916 self._start()
917 E = self._expect
918 try:
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc
in _start(self, alt_message, block_during_init)
241
242 def _start(self, alt_message=None, block_during_init=True):
--> 243 Expect._start(self, alt_message, block_during_init)
244 # disable memory debugging: those warnings can only confuse
our
245 # interface
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in _start(self, alt_message, block_during_init)
501 # Work around
https://bugs.python.org/issue1652
502 preexec_fn=lambda:
signal.signal(signal.SIGPIPE, signal.SIG_DFL),
--> 503 quit_string=self._quit_string())
504 except (ExceptionPexpect, pexpect.EOF) as e:
505 # Change pexpect errors to RuntimeError
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/sagespawn.pyx
in sage.interfaces.sagespawn.SageSpawn.__init__
(build/cythonized/sage/interfaces/sagespawn.c:1948)()
63 kwds.setdefault("maxread", 4194304)
64
---> 65 with ContainChildren(silent=True):
66 spawn.__init__(self, *args, **kwds)
67
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/sagespawn.pyx
in sage.interfaces.sagespawn.SageSpawn.__init__
(build/cythonized/sage/interfaces/sagespawn.c:1902)()
64
65 with ContainChildren(silent=True):
---> 66 spawn.__init__(self, *args, **kwds)
67
68 self.delaybeforesend = None
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/pty_spawn.pyc in
__init__(self, command, args, timeout, maxread, searchwindowsize, logfile,
cwd, env, ignore_sighup, echo, preexec_fn, encoding, codec_errors,
dimensions, use_poll)
202 self.name = ''
203 else:
--> 204 self._spawn(command, args, preexec_fn, dimensions)
205 self.use_poll = use_poll
206
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/pty_spawn.pyc in
_spawn(self, command, args, preexec_fn, dimensions)
301
302 self.ptyproc = self._spawnpty(self.args, env=self.env,
--> 303 cwd=self.cwd, **kwargs)
304
305 self.pid = self.ptyproc.pid
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/sagespawn.pyx
in sage.interfaces.sagespawn.SageSpawn._spawnpty
(build/cythonized/sage/interfaces/sagespawn.c:2133)()
80 SagePtyProcess.spawn(...)
81 """
---> 82 ptyproc = SagePtyProcess.spawn(args
Re: [sage-devel] ValueError: filedescriptor out of range in select()
Trying to provoke more errors:
sage: from sage.env import SAGE_EXTCODE
sage: for k in range(1):
: gp = Gp()
: gp.read(SAGE_EXTCODE + "/pari/simon/qfsolve.gp")
: k
breaks at k = 1922 with
-
OSError Traceback (most recent call last)
in ()
1 for k in range(Integer(1)):
2 gp = Gp()
> 3 gp.read(SAGE_EXTCODE + "/pari/simon/qfsolve.gp")
4 k
5
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/interface.pyc
in read(self, filename)
222 sage: os.unlink(filename)
223 """
--> 224 self.eval(self._read_in_file_command(filename))
225
226 def _read_in_file_command(self, filename):
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in eval(self, code, strip, synchronize, locals, allow_use_file,
split_lines, **kwds)
1349 elif split_lines:
1350 return '\n'.join([self._eval_line(L,
allow_use_file=allow_use_file, **kwds)
-> 1351 for L in code.split('\n')
if L != ''])
1352 else:
1353 return self._eval_line(code,
allow_use_file=allow_use_file, **kwds)
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc
in _eval_line(self, line, allow_use_file, wait_for_prompt,
restart_if_needed)
443 a = Expect._eval_line(self, line,
444 allow_use_file=allow_use_file,
--> 445 wait_for_prompt=wait_for_prompt)
446 if a.find("the PARI stack overflows") != -1:
447 verbose("automatically doubling the PARI stack and
re-executing current input line")
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in _eval_line(self, line, allow_use_file, wait_for_prompt,
restart_if_needed)
914 try:
915 if self._expect is None:
--> 916 self._start()
917 E = self._expect
918 try:
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc
in _start(self, alt_message, block_during_init)
241
242 def _start(self, alt_message=None, block_during_init=True):
--> 243 Expect._start(self, alt_message, block_during_init)
244 # disable memory debugging: those warnings can only confuse
our
245 # interface
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in _start(self, alt_message, block_during_init)
501 # Work around
https://bugs.python.org/issue1652
502 preexec_fn=lambda:
signal.signal(signal.SIGPIPE, signal.SIG_DFL),
--> 503 quit_string=self._quit_string())
504 except (ExceptionPexpect, pexpect.EOF) as e:
505 # Change pexpect errors to RuntimeError
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/sagespawn.pyx
in sage.interfaces.sagespawn.SageSpawn.__init__
(build/cythonized/sage/interfaces/sagespawn.c:1948)()
63 kwds.setdefault("maxread", 4194304)
64
---> 65 with ContainChildren(silent=True):
66 spawn.__init__(self, *args, **kwds)
67
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/sagespawn.pyx
in sage.interfaces.sagespawn.SageSpawn.__init__
(build/cythonized/sage/interfaces/sagespawn.c:1902)()
64
65 with ContainChildren(silent=True):
---> 66 spawn.__init__(self, *args, **kwds)
67
68 self.delaybeforesend = None
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/pty_spawn.pyc in
__init__(self, command, args, timeout, maxread, searchwindowsize, logfile,
cwd, env, ignore_sighup, echo, preexec_fn, encoding, codec_errors,
dimensions, use_poll)
202 self.name = ''
203 else:
--> 204 self._spawn(command, args, preexec_fn, dimensions)
205 self.use_poll = use_poll
206
/home/simon/sage/local/lib/python2.7/site-packages/pexpect/pty_spawn.pyc in
_spawn(self, command, args, preexec_fn, dimensions)
301
302 self.ptyproc = self._spawnpty(self.args, env=self.env,
--> 303 cwd=self.cwd, **kwargs)
304
305 self.pid = self.ptyproc.pid
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/sagespawn.pyx
in sage.interfaces.sagespawn.SageSpawn._spawnpty
(build/cythonized/sage/interfaces/sagespawn.c:2133)()
80 SagePtyProcess.spawn(...)
81 """
---> 82 ptyproc = SagePtyProcess.spawn(args, **kwds)
83 ptyproc.quit_string = self.quit_string
84 return ptyproc
/home/simon/sage/local/lib/python2.7/site-packages/ptyproces
Re: [sage-devel] ValueError: filedescriptor out of range in select()
Could it be a failed attempt to recover from a PARI/GP stackoverflow?
Just guessing.
On Sun, Mar 3, 2019 at 9:21 AM Simon Brandhorst wrote:
>
> I am trying a medium scale computation. Unfortunately it breaks every time
> with error messages I do not know how to interpret.
> They may or may not be bugs in sage. Here is a traceback
>
> --
> ValueErrorTraceback (most recent call last)
> in ()
> > 1 classify_ord_pe(L,Integer(2),Integer(2),'results/order4.txt','a')
>
> /home/simon/.sage/temp/k3/2030/K3_aut_classification.sageWSsnuG.py in
> classify_ord_pe(L, p, e, file_name, rw)
> 258 print(" ")
> 259 cofix = cofixed[k].twist(-_sage_const_1 )
> --> 260 for Aa in k3_prime_power(fix.genus(), p, e):
> 261 A, a, Oa = Aa
> 262 actsg = MaximalK3surfaceAut(A, cofix, a, Oa)
>
> /home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
> k3_prime_power(genus, prime, e)
> 138 signatures += [[ranks_E[k]]*(weights[k]//_sage_const_2 )
> for k in range(_sage_const_1 ,n)]
> 139 signatures[-_sage_const_1 ][_sage_const_0 ] -= _sage_const_1
> --> 140 for act in prime_power_actions(genus,prime,ranks,signatures):
> 141 yield act
> 142
>
> /home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
> prime_power_actions(genus, p, ranks, signatures)
> 278 # recurse
> 279 # print(R)
> --> 280 for N in prime_power_actions(R, p,
> ranks[:-_sage_const_1 ], R_signatures):
> 281 N, fN, GN = N
> 282 ext = extensions(M, fM, N, fN, GM, GN,
> glue_order, p)
>
> /home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
> prime_power_actions(genus, p, ranks, signatures)
> 278 # recurse
> 279 # print(R)
> --> 280 for N in prime_power_actions(R, p,
> ranks[:-_sage_const_1 ], R_signatures):
> 281 N, fN, GN = N
> 282 ext = extensions(M, fM, N, fN, GM, GN,
> glue_order, p)
>
> /home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
> prime_power_actions(genus, p, ranks, signatures)
> 196 if len(ranks) == _sage_const_1 :
> 197 # there is nothing to glue
> --> 198 for M in genus.representatives():
> 199 fM = M ** _sage_const_0
> 200 M = IntegralLattice(M)
>
> /home/simon/sage/local/lib/python2.7/site-packages/sage/quadratic_forms/genera/genus.pyc
> in representatives(self, backend, algorithm)
>3161 if self.signature_pair()[0] == 0:
>3162 e *= ZZ(-1)
> -> 3163 Q = QuadraticForm(e*self.representative())
>3164 seeds = [Q]
>3165 for p in self.spinor_generators(proper=False):
>
> /home/simon/sage/local/lib/python2.7/site-packages/sage/quadratic_forms/genera/genus.pyc
> in representative(self)
>3010 """
>3011 if self._representative is None:
> -> 3012 self._compute_representative()
>3013 return self._representative
>3014
>
> /home/simon/sage/local/lib/python2.7/site-packages/sage/quadratic_forms/genera/genus.pyc
> in _compute_representative(self, LLL)
>3085 gp = Gp()
>3086 m = pari(L)
> -> 3087 gp.read(SAGE_EXTCODE + "/pari/simon/qfsolve.gp")
>3088 m = gp.eval('qflllgram_indefgoon(%s)'%m)
>3089 # convert the output string to sage
>
> /home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/interface.pyc
> in read(self, filename)
> 222 sage: os.unlink(filename)
> 223 """
> --> 224 self.eval(self._read_in_file_command(filename))
> 225
> 226 def _read_in_file_command(self, filename):
>
> /home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
> in eval(self, code, strip, synchronize, locals, allow_use_file, split_lines,
> **kwds)
>1349 elif split_lines:
>1350 return '\n'.join([self._eval_line(L,
> allow_use_file=allow_use_file, **kwds)
> -> 1351 for L in code.split('\n') if
> L != ''])
>1352 else:
>1353 return self._eval_line(code,
> allow_use_file=allow_use_file, **kwds)
>
> /home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc in
> _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed)
> 443 a = Expect._eval_line(self, line,
> 444 allow_use_file=allow_use_file,
> --> 445 wait_for_prompt=wait_for_prompt)
> 446
[sage-devel] ValueError: filedescriptor out of range in select()
I am trying a medium scale computation. Unfortunately it breaks every time
with error messages I do not know how to interpret.
They may or may not be bugs in sage. Here is a traceback
--
ValueErrorTraceback (most recent call last)
in ()
> 1 classify_ord_pe(L,Integer(2),Integer(2),'results/order4.txt','a')
/home/simon/.sage/temp/k3/2030/K3_aut_classification.sageWSsnuG.py in
classify_ord_pe(L, p, e, file_name, rw)
258 print(" ")
259 cofix = cofixed[k].twist(-_sage_const_1 )
--> 260 for Aa in k3_prime_power(fix.genus(), p, e):
261 A, a, Oa = Aa
262 actsg = MaximalK3surfaceAut(A, cofix, a, Oa)
/home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in k3_prime_power(
genus, prime, e)
138 signatures += [[ranks_E[k]]*(weights[k]//_sage_const_2
) for k in range(_sage_const_1 ,n)]
139 signatures[-_sage_const_1 ][_sage_const_0 ] -= _sage_const_1
--> 140 for act in prime_power_actions(genus,prime,ranks,signatures
):
141 yield act
142
/home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
prime_power_actions(genus, p, ranks, signatures)
278 # recurse
279 # print(R)
--> 280 for N in prime_power_actions(R, p,
ranks[:-_sage_const_1
], R_signatures):
281 N, fN, GN = N
282 ext = extensions(M, fM, N, fN, GM, GN,
glue_order, p)
/home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
prime_power_actions(genus, p, ranks, signatures)
278 # recurse
279 # print(R)
--> 280 for N in prime_power_actions(R, p,
ranks[:-_sage_const_1
], R_signatures):
281 N, fN, GN = N
282 ext = extensions(M, fM, N, fN, GM, GN,
glue_order, p)
/home/simon/.sage/temp/k3/2030/prime_power.sagez0p9M2.py in
prime_power_actions(genus, p, ranks, signatures)
196 if len(ranks) == _sage_const_1 :
197 # there is nothing to glue
--> 198 for M in genus.representatives():
199 fM = M ** _sage_const_0
200 M = IntegralLattice(M)
/home/simon/sage/local/lib/python2.7/site-packages/sage/quadratic_forms/
genera/genus.pyc in representatives(self, backend, algorithm)
3161 if self.signature_pair()[0] == 0:
3162 e *= ZZ(-1)
-> 3163 Q = QuadraticForm(e*self.representative())
3164 seeds = [Q]
3165 for p in self.spinor_generators(proper=False):
/home/simon/sage/local/lib/python2.7/site-packages/sage/quadratic_forms/
genera/genus.pyc in representative(self)
3010 """
3011 if self._representative is None:
-> 3012 self._compute_representative()
3013 return self._representative
3014
/home/simon/sage/local/lib/python2.7/site-packages/sage/quadratic_forms/genera/genus.pyc
in _compute_representative(self, LLL)
3085 gp = Gp()
3086 m = pari(L)
-> 3087 gp.read(SAGE_EXTCODE + "/pari/simon/qfsolve.gp")
3088 m = gp.eval('qflllgram_indefgoon(%s)'%m)
3089 # convert the output string to sage
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/interface.pyc
in read(self, filename)
222 sage: os.unlink(filename)
223 """
--> 224 self.eval(self._read_in_file_command(filename))
225
226 def _read_in_file_command(self, filename):
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in eval(self, code, strip, synchronize, locals, allow_use_file, split_lines,
**kwds)
1349 elif split_lines:
1350 return '\n'.join([self._eval_line(L,
allow_use_file=allow_use_file, **kwds)
-> 1351 for L in code.split('\n') if
L != ''])
1352 else:
1353 return self._eval_line(code, allow_use_file=
allow_use_file, **kwds)
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/gp.pyc in
_eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed)
443 a = Expect._eval_line(self, line,
444 allow_use_file=allow_use_file,
--> 445 wait_for_prompt=wait_for_prompt)
446 if a.find("the PARI stack overflows") != -1:
447 verbose("automatically doubling the PARI stack and
re-executing current input line")
/home/simon/sage/local/lib/python2.7/site-packages/sage/interfaces/expect.pyc
in _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed
)
914 try:
