------------------------------------------------------------------------
/usr/lib/python2.7/site-packages/cysignals/signals.so(+0x4347)[0x7f9ef5d49347]
/usr/lib/python2.7/site-packages/cysignals/signals.so(+0x4745)[0x7f9ef5d49745]
/usr/lib/python2.7/site-packages/cysignals/signals.so(+0x6e3b)[0x7f9ef5d4be3b]
/usr/lib/libpthread.so.0(+0x10ef0)[0x7f9efde77ef0]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_double.so(_ZN5FFLAS7details7freduceIN6Givaro7ModularIddEEEENSt9enable_ifIXsrNS_16support_simd_modINT_7ElementEEE5valueEvE4typeERKS7_mNS7_11Element_ptrEmNS_15FieldCategories10ModularTagE+0x1e5)[0x7f9e1afd5be5]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_double.so(_ZN5FFLAS7freduceIN6Givaro7ModularIddEEEEvRKT_mmNS4_11Element_ptrEm+0x50)[0x7f9e1afd6160]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_double.so(+0x3f840)[0x7f9e1afc5840]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_double.so(_ZN5FFLAS5fgemmIN6Givaro7ModularIddEEEENT_11Element_ptrERKS4_NS_15FFLAS_TRANSPOSEES8_mmmNS4_7ElementENS4_16ConstElement_ptrEmSA_mS9_S5_m+0xab)[0x7f9e1aff09db]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_double.so(_ZN6FFPACK8LUdivineIN6Givaro7ModularIddEEEEmRKT_N5FFLAS10FFLAS_DIAGENS7_15FFLAS_TRANSPOSEEmmNS4_11Element_ptrEmPmSB_NS_13FFPACK_LU_TAGEm+0x934)[0x7f9e1aff3034]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_double.so(_ZN6FFPACK8LUdivineIN6Givaro7ModularIddEEEEmRKT_N5FFLAS10FFLAS_DIAGENS7_15FFLAS_TRANSPOSEEmmNS4_11Element_ptrEmPmSB_NS_13FFPACK_LU_TAGEm+0xf9)[0x7f9e1aff27f9]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_double.so(_ZN6FFPACK8LUdivineIN6Givaro7ModularIddEEEEmRKT_N5FFLAS10FFLAS_DIAGENS7_15FFLAS_TRANSPOSEEmmNS4_11Element_ptrEmPmSB_NS_13FFPACK_LU_TAGEm+0xf9)[0x7f9e1aff27f9]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_double.so(+0x4117b)[0x7f9e1afc717b]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_double.so(+0x4171b)[0x7f9e1afc771b]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_integer_dense.so(+0x253fd)[0x7f9e1c1e03fd]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_integer_dense.so(+0x10f92)[0x7f9e1c1cbf92]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_integer_dense.so(+0x8210f)[0x7f9e1c23d10f]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_rational_dense.so(+0xb672)[0x7f9e1bb1e672]
/usr/lib/python2.7/site-packages/sage/matrix/matrix_rational_dense.so(+0x203e3)[0x7f9e1bb333e3]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x6b22)[0x7f9efe16eb12]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x86c)[0x7f9efe171adc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x28)[0x7f9efe171c08]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x7f0b)[0x7f9efe16fefb]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x86c)[0x7f9efe171adc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x68cc)[0x7f9efe16e8bc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x86c)[0x7f9efe171adc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x68cc)[0x7f9efe16e8bc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x86c)[0x7f9efe171adc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x68cc)[0x7f9efe16e8bc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x86c)[0x7f9efe171adc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x68cc)[0x7f9efe16e8bc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x86c)[0x7f9efe171adc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x68cc)[0x7f9efe16e8bc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x86c)[0x7f9efe171adc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x68cc)[0x7f9efe16e8bc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x86c)[0x7f9efe171adc]
/usr/lib/libpython2.7.so.1.0(PyEval_EvalCode+0x28)[0x7f9efe171c08]
/usr/lib/libpython2.7.so.1.0(+0x10823e)[0x7f9efe18c23e]
/usr/lib/libpython2.7.so.1.0(PyRun_FileExFlags+0x81)[0x7f9efe18d481]
/usr/lib/libpython2.7.so.1.0(PyRun_SimpleFileExFlags+0xf6)[0x7f9efe18e7a6]
/usr/lib/libpython2.7.so.1.0(Py_Main+0xcd1)[0x7f9efe1a1051]
/usr/lib/libc.so.6(__libc_start_main+0xf1)[0x7f9efdae6741]
python2(_start+0x29)[0x5578f0ee6819]
------------------------------------------------------------------------
Attaching gdb to process id 20274.

Saved trace to /home/long/.sage/crash_logs/crash_bhG7X1.log
------------------------------------------------------------------------
Unhandled SIGILL: An illegal instruction 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.
------------------------------------------------------------------------
[1]    20274 illegal hardware instruction (core dumped)  sage