(gdb) back
#0  0x00007fffecf2ea7a in SWIG_Python_ConvertPtrAndOwn (obj=0x21a8890,
    ptr=0x7fffffffcd60, ty=0x7fffede42080 <_swigt__p_shogun__CDirectorKernel>,
    flags=0, own=0x0) at modshogun_wrap.cxx:2336
#1  0x00007fffed4d4fa6 in _wrap_DirectorKernel_init (self=0x21a8890,
    args=0x5fe5638) at modshogun_wrap.cxx:475791
#2  0x000000000049629d in PyEval_CallObjectWithKeywords ()
#3  0x00000000004fcfb4 in ?? ()
#4  0x00000000004600be in PyEval_EvalFrameEx ()
#5  0x0000000000467209 in PyEval_EvalCodeEx ()
#6  0x000000000045ff77 in PyEval_EvalFrameEx ()
#7  0x0000000000467209 in PyEval_EvalCodeEx ()
#8  0x00000000004aa118 in ?? ()
#9  0x000000000048249d in ?? ()
#10 0x0000000000491bb4 in ?? ()
#11 0x00000000004aac6e in ?? ()
#12 0x000000000046172e in PyEval_EvalFrameEx ()
#13 0x0000000000467209 in PyEval_EvalCodeEx ()
#14 0x00000000004aa118 in ?? ()
#15 0x000000000046172e in PyEval_EvalFrameEx ()
#16 0x0000000000467209 in PyEval_EvalCodeEx ()
#17 0x000000000045ff77 in PyEval_EvalFrameEx ()
#18 0x0000000000467209 in PyEval_EvalCodeEx ()
#19 0x00000000004d0242 in PyEval_EvalCode ()
---Type <return> to continue, or q <return> to quit---
#20 0x00000000005102bb in ?? ()
#21 0x000000000044a466 in PyRun_FileExFlags ()
#22 0x000000000044a97a in PyRun_SimpleFileExFlags ()
#23 0x000000000044b6bc in Py_Main ()
#24 0x00007ffff6f0576d in __libc_start_main ()
   from /lib/x86_64-linux-gnu/libc.so.6
#25 0x00000000004ce0ad in _start ()