Hi,
  I do see relatively often a crash in python. Here is one stacktrace from my Gentoo Linux running 3.7.4 kernel:

(gdb) where
#0  0x00007f624f340f08 in visit_decref () from /usr/lib64/libpython2.7.so.1.0
#1  0x00007f624f2a455a in list_traverse () from /usr/lib64/libpython2.7.so.1.0
#2  0x00007f624f3412c7 in collect () from /usr/lib64/libpython2.7.so.1.0
#3  0x00007f624f341f11 in _PyObject_GC_Malloc () from /usr/lib64/libpython2.7.so.1.0
#4  0x00007f624f2cdd59 in PyType_GenericAlloc () from /usr/lib64/libpython2.7.so.1.0
#5  0x00007f624f2d09c3 in type_call () from /usr/lib64/libpython2.7.so.1.0
#6  0x00007f624f27bdc3 in PyObject_Call () from /usr/lib64/libpython2.7.so.1.0
#7  0x00007f624f310d76 in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#8  0x00007f624f31285e in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#9  0x00007f624f313905 in PyEval_EvalCodeEx () from /usr/lib64/libpython2.7.so.1.0
#10 0x00007f624f313a32 in PyEval_EvalCode () from /usr/lib64/libpython2.7.so.1.0
#11 0x00007f624f32d97c in run_mod () from /usr/lib64/libpython2.7.so.1.0
#12 0x00007f624f32e53d in PyRun_StringFlags () from /usr/lib64/libpython2.7.so.1.0
#13 0x00007f624f30a44e in builtin_eval () from /usr/lib64/libpython2.7.so.1.0
#14 0x00007f624f312456 in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#15 0x00007f624f313905 in PyEval_EvalCodeEx () from /usr/lib64/libpython2.7.so.1.0
#16 0x00007f624f2a104c in function_call () from /usr/lib64/libpython2.7.so.1.0
#17 0x00007f624f27bdc3 in PyObject_Call () from /usr/lib64/libpython2.7.so.1.0
#18 0x00007f624f28a82f in instancemethod_call () from /usr/lib64/libpython2.7.so.1.0
#19 0x00007f624f27bdc3 in PyObject_Call () from /usr/lib64/libpython2.7.so.1.0
#20 0x00007f624f30c9b7 in PyEval_CallObjectWithKeywords () from /usr/lib64/libpython2.7.so.1.0
#21 0x00007f624612f807 in call_with_frame.isra.9 () from /usr/lib64/python2.7/lib-dynload/pyexpat.so
#22 0x00007f6246132080 in my_StartElementHandler () from /usr/lib64/python2.7/lib-dynload/pyexpat.so
#23 0x00007f6245ed0fb0 in doContent () from /usr/lib64/libexpat.so.1
#24 0x00007f6245ed21b4 in contentProcessor () from /usr/lib64/libexpat.so.1
#25 0x00007f6245ecce2a in XML_ParseBuffer () from /usr/lib64/libexpat.so.1
#26 0x00007f6246132d5b in xmlparse_Parse () from /usr/lib64/python2.7/lib-dynload/pyexpat.so
#27 0x00007f624f312456 in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#28 0x00007f624f296379 in gen_send_ex.isra.1 () from /usr/lib64/libpython2.7.so.1.0
#29 0x00007f624f2ce40f in wrap_next () from /usr/lib64/libpython2.7.so.1.0
#30 0x00007f624f27bdc3 in PyObject_Call () from /usr/lib64/libpython2.7.so.1.0
#31 0x00007f624f310d76 in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#32 0x00007f624f31285e in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#33 0x00007f624f31285e in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#34 0x00007f624f31285e in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#35 0x00007f624f31285e in PyEval_EvalFrameEx () from /usr/lib64/libpython2.7.so.1.0
#36 0x00007f624f313905 in PyEval_EvalCodeEx () from /usr/lib64/libpython2.7.so.1.0
#37 0x00007f624f313a32 in PyEval_EvalCode () from /usr/lib64/libpython2.7.so.1.0
#38 0x00007f624f32d97c in run_mod () from /usr/lib64/libpython2.7.so.1.0
#39 0x00007f624f32e750 in PyRun_FileExFlags () from /usr/lib64/libpython2.7.so.1.0
#40 0x00007f624f32f1cf in PyRun_SimpleFileExFlags () from /usr/lib64/libpython2.7.so.1.0
#41 0x00007f624f3407e2 in Py_Main () from /usr/lib64/libpython2.7.so.1.0
#42 0x00007f624ec8f91d in __libc_start_main () from /lib64/libc.so.6
#43 0x000000000040094d in _start ()
(gdb)