(gdb) bt
#0  0x00007f155a470d43 in svm::Solver::select_working_set(int&, int&) () from /usr/lib/pymodules/python2.6/sklearn/svm/libsvm.so
#1  0x00007f155a47651f in svm::Solver::Solve(int, svm::QMatrix const&, double const*, signed char const*, double*, double const*, double, svm::Solver::SolutionInfo*, int) () from /usr/lib/pymodules/python2.6/sklearn/svm/libsvm.so
#2  0x00007f155a47d3a0 in ?? () from /usr/lib/pymodules/python2.6/sklearn/svm/libsvm.so
#3  0x00007f155a47e2bd in svm_train () from /usr/lib/pymodules/python2.6/sklearn/svm/libsvm.so
#4  0x00007f155a45b67b in ?? () from /usr/lib/pymodules/python2.6/sklearn/svm/libsvm.so
#5  0x00000000004a7a07 in PyEval_EvalFrameEx ()
#6  0x00000000004a9671 in PyEval_EvalCodeEx ()
#7  0x00000000004a7809 in PyEval_EvalFrameEx ()
#8  0x00000000004a9671 in PyEval_EvalCodeEx ()
#9  0x000000000053771d in ?? ()
#10 0x000000000041f0c7 in PyObject_Call ()
#11 0x00000000004a6351 in PyEval_EvalFrameEx ()
#12 0x00000000004a9671 in PyEval_EvalCodeEx ()
#13 0x000000000053771d in ?? ()
#14 0x000000000041f0c7 in PyObject_Call ()
#15 0x0000000000427dff in ?? ()
#16 0x000000000041f0c7 in PyObject_Call ()
#17 0x00000000004786ff in ?? ()
#18 0x000000000041f0c7 in PyObject_Call ()
#19 0x00000000004a6351 in PyEval_EvalFrameEx ()
#20 0x00000000004a9671 in PyEval_EvalCodeEx ()
#21 0x000000000053771d in ?? ()
#22 0x000000000041f0c7 in PyObject_Call ()
#23 0x00000000004a6351 in PyEval_EvalFrameEx ()
#24 0x00000000004a8550 in PyEval_EvalFrameEx ()
#25 0x00000000004a8550 in PyEval_EvalFrameEx ()
#26 0x00000000004a9671 in PyEval_EvalCodeEx ()
#27 0x0000000000537620 in ?? ()
#28 0x000000000041f0c7 in PyObject_Call ()
#29 0x0000000000427dff in ?? ()
#30 0x000000000041f0c7 in PyObject_Call ()
#31 0x0000000000477bff in ?? ()
#32 0x000000000046f47f in ?? ()
#33 0x000000000041f0c7 in PyObject_Call ()
#34 0x00000000004a7378 in PyEval_EvalFrameEx ()
#35 0x00000000004a8550 in PyEval_EvalFrameEx ()
#36 0x00000000004a9671 in PyEval_EvalCodeEx ()
#37 0x0000000000537620 in ?? ()
#38 0x000000000041f0c7 in PyObject_Call ()
#39 0x0000000000427dff in ?? ()
#40 0x000000000041f0c7 in PyObject_Call ()
#41 0x0000000000477bff in ?? ()
#42 0x000000000046f47f in ?? ()
#43 0x000000000041f0c7 in PyObject_Call ()
#44 0x00000000004a7378 in PyEval_EvalFrameEx ()
#45 0x00000000004a9671 in PyEval_EvalCodeEx ()
#46 0x00000000004a7809 in PyEval_EvalFrameEx ()
#47 0x00000000004a9671 in PyEval_EvalCodeEx ()
#48 0x0000000000537620 in ?? ()
#49 0x000000000041f0c7 in PyObject_Call ()
#50 0x0000000000427dff in ?? ()
#51 0x000000000041f0c7 in PyObject_Call ()
#52 0x00000000004786ff in ?? ()
#53 0x000000000041f0c7 in PyObject_Call ()
#54 0x00000000004a7378 in PyEval_EvalFrameEx ()
#55 0x00000000004a9671 in PyEval_EvalCodeEx ()
#56 0x00000000004a7809 in PyEval_EvalFrameEx ()
#57 0x00000000004a9671 in PyEval_EvalCodeEx ()
#58 0x00000000004a9742 in PyEval_EvalCode ()
#59 0x00000000004c9a0e in PyRun_FileExFlags ()
#60 0x00000000004c9c24 in PyRun_SimpleFileExFlags ()
#61 0x000000000041a7ff in Py_Main ()
#62 0x00007f1562db1c4d in __libc_start_main () from /lib/libc.so.6
#63 0x00000000004199f9 in _start ()