#20693: Sage crashes when computing newforms
-----------------------------+---------------------------------
Reporter: ehlen | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.3
Component: modular forms | Keywords:
Merged in: | Authors: Stephan Ehlen
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
-----------------------------+---------------------------------
Computing newforms for a certain character of modulus 23 fails in sage
7.2.
Here's how to reproduce it (you have to wait 10 minutes or so until the
crash happens):
sage: D=DirichletGroup(23)
sage: c=D.gen()^2
sage: N=Newforms(c,6, names='a')
Then I get
{{{
/usr/local/sage/sage-1/local/lib/python2.7/site-
packages/cysignals/signals.so(+0x4715)[0x7fc7327c4715]
/usr/local/sage/sage-1/local/lib/python2.7/site-
packages/cysignals/signals.so(+0x4765)[0x7fc7327c4765]
/usr/local/sage/sage-1/local/lib/python2.7/site-
packages/cysignals/signals.so(+0x6f41)[0x7fc7327c6f41]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7fc73aae0330]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x37)[0x7fc73a73ec37]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x148)[0x7fc73a742028]
/usr/local/sage/sage-1/local/lib/libntl.so.19(_ZN3NTL13TerminalErrorEPKc+0x2b)[0x7fc72603512b]
/usr/local/sage/sage-1/local/lib/libntl.so.19(_ZN3NTL11UseFFTPrimeEl+0x33)[0x7fc725ef13c3]
/usr/local/sage/sage-1/local/lib/libntl.so.19(_ZN3NTL11zz_pContextC1ERKNS_15INIT_FFT_STRUCTEl+0x28)[0x7fc725fd3838]
/usr/local/sage/sage-1/local/lib/libntl.so.19(_ZN3NTL4zz_p7FFTInitEl+0x17)[0x7fc725fd3967]
/usr/local/sage/sage-1/local/lib/libntl.so.19(_ZN3NTL9resultantERNS_2ZZERKNS_3ZZXES4_l+0x184)[0x7fc725f602f4]
/usr/local/sage/sage-1/local/lib/libntl.so.19(_ZN3NTL4XGCDERNS_2ZZERNS_3ZZXES3_RKS2_S5_l+0x50)[0x7fc725f64b20]
/usr/local/sage/sage-1/local/lib/python2.7/site-
packages/sage/rings/number_field/number_field_element.so(+0x91149)[0x7fb7396e1149]
/usr/local/sage/sage-1/local/lib/python2.7/site-
packages/sage/rings/number_field/number_field_element.so(+0xff39)[0x7fb73965ff39]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x1efa)[0x7fc73adf5caa]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(+0x84425)[0x7fc73ad74425]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fc73ad42733]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(+0x61205)[0x7fc73ad51205]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fc73ad42733]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(+0xbdfaf)[0x7fc73adadfaf]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(+0xbcb3f)[0x7fc73adacb3f]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fc73ad42733]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x1d51)[0x7fc73adf5b01]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7fc73adf9fb2]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4dae)[0x7fc73adf8b5e]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(+0x84425)[0x7fc73ad74425]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fc73ad42733]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x1426)[0x7fc73adf51d6]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(+0x84425)[0x7fc73ad74425]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fc73ad42733]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x1426)[0x7fc73adf51d6]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7fc73adf9fb2]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4dae)[0x7fc73adf8b5e]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x43a1)[0x7fc73adf8151]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x80d)[0x7fc73adf9e7d]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x32)[0x7fc73adf9fb2]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyRun_FileExFlags+0x92)[0x7fc73ae236f2]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(PyRun_SimpleFileExFlags+0xd9)[0x7fc73ae24c39]
/usr/local/sage/sage-1/local/lib/libpython2.7.so.1.0(Py_Main+0xc7f)[0x7fc73ae3ac6f]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x7fc73a729f45]
python[0x40071e]
------------------------------------------------------------------------
Attaching gdb to process id 52504.
Saved trace to /home/ehlen/.sage/crash_logs/crash_BoCUvt.log
------------------------------------------------------------------------
Unhandled SIGABRT: An abort() occurred.
This probably occurred because a *compiled* module has a bug
in it and is not properly wrapped with sig_on(), sig_off().
Python will now terminate.
------------------------------------------------------------------------
Aborted (core dumped)
}}}
The file home/ehlen/.sage/crash_logs/crash_BoCUvt.log is empty.
{{{
sage: version()
'SageMath version 7.2, Release Date: 2016-05-15'
}}}
Sage has been compiled from source in this case.
I tested the same commands on a sage 7.1 compiled from source on a
different machine and got a crash as well!
{{{
sage: N=Newforms(c,6, names='a')
------------------------------------------------------------------------
0 signals.so 0x000000010dc3b5c5 print_backtrace
+ 37
------------------------------------------------------------------------
Unhandled SIGABRT: An abort() occurred.
This probably occurred because a *compiled* module has a bug
in it and is not properly wrapped with sig_on(), sig_off().
Python will now terminate.
------------------------------------------------------------------------
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/20693>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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