Program received signal SIGSEGV, Segmentation fault.
0x00007ffff74afd36 in strlen () from /usr/lib/libc.so.6

#0  0x00007ffff74afd36 in strlen () at /usr/lib/libc.so.6
#1  0x00007ffff7a871b9 in PyString_FromFormatV () at /usr/lib/libpython2.7.so.1.0
#2  0x00007ffff7ae7a08 in PyErr_Format () at /usr/lib/libpython2.7.so.1.0
#3  0x00007ffff122eef7 in  () at /usr/lib/python2.7/site-packages/sip.so
#4  0x00007ffff638f006 in initQwt () at /usr/lib/python2.7/site-packages/PyQt4/Qwt5/Qwt.so
#5  0x00007ffff7af203c in _PyImport_LoadDynamicModule () at /usr/lib/libpython2.7.so.1.0
#6  0x00007ffff7aeff81 in import_submodule () at /usr/lib/libpython2.7.so.1.0
#7  0x00007ffff7af0209 in load_next () at /usr/lib/libpython2.7.so.1.0
#8  0x00007ffff7af0c63 in PyImport_ImportModuleLevel () at /usr/lib/libpython2.7.so.1.0
#9  0x00007ffff7ad2907 in builtin___import__ () at /usr/lib/libpython2.7.so.1.0
#10 0x00007ffff7a3c682 in PyObject_Call () at /usr/lib/libpython2.7.so.1.0
#11 0x00007ffff7ad4716 in PyEval_CallObjectWithKeywords () at /usr/lib/libpython2.7.so.1.0
#12 0x00007ffff7ad7552 in PyEval_EvalFrameEx () at /usr/lib/libpython2.7.so.1.0
#13 0x00007ffff7ade8dc in PyEval_EvalCodeEx () at /usr/lib/libpython2.7.so.1.0
#14 0x00007ffff7ade9e8 in PyEval_EvalCode () at /usr/lib/libpython2.7.so.1.0
#15 0x00007ffff7aeefc7 in PyImport_ExecCodeModuleEx () at /usr/lib/libpython2.7.so.1.0
#16 0x00007ffff7aef25e in load_source_module () at /usr/lib/libpython2.7.so.1.0
#17 0x00007ffff7af0811 in load_package () at /usr/lib/libpython2.7.so.1.0
#18 0x00007ffff7aeff81 in import_submodule () at /usr/lib/libpython2.7.so.1.0
#19 0x00007ffff7af0209 in load_next () at /usr/lib/libpython2.7.so.1.0
#20 0x00007ffff7af0ca8 in PyImport_ImportModuleLevel () at /usr/lib/libpython2.7.so.1.0
#21 0x00007ffff7ad2907 in builtin___import__ () at /usr/lib/libpython2.7.so.1.0
#22 0x00007ffff7a3c682 in PyObject_Call () at /usr/lib/libpython2.7.so.1.0
#23 0x00007ffff7ad4716 in PyEval_CallObjectWithKeywords () at /usr/lib/libpython2.7.so.1.0
#24 0x00007ffff7ad7552 in PyEval_EvalFrameEx () at /usr/lib/libpython2.7.so.1.0
#25 0x00007ffff7ade8dc in PyEval_EvalCodeEx () at /usr/lib/libpython2.7.so.1.0
#26 0x00007ffff7ade9e8 in PyEval_EvalCode () at /usr/lib/libpython2.7.so.1.0
#27 0x00007ffff7af8efe in run_mod () at /usr/lib/libpython2.7.so.1.0
#28 0x00007ffff7afa1c1 in PyRun_FileExFlags () at /usr/lib/libpython2.7.so.1.0
#29 0x00007ffff7afb4e4 in PyRun_SimpleFileExFlags () at /usr/lib/libpython2.7.so.1.0
#30 0x00007ffff7b0dca0 in Py_Main () at /usr/lib/libpython2.7.so.1.0
#31 0x00007ffff744e511 in __libc_start_main () at /usr/lib/libc.so.6
#32 0x00005555555547ea in _start ()