The following snippet is present in the function importModule @
libshiboken/basewrapper.cpp:

    if (!module)
       module = PyImport_ImportModule(moduleName);
    else
       Py_INCREF(module);

   Shiboken::AutoDecRef cppApi(PyObject_GetAttrString(module, "_Cpp_Api"));

The problem is that if the PyImport_ImportModule() call fails for any reason it
returns NULL to the module variable [1], and when module is passed to
PyObject_GetAttrString() a SIGSEGV follows.

A (maybe not ideal) fix would be just verify the module variable again and
return false if it is still NULL:

    if (!module) {
       module = PyImport_ImportModule(moduleName);
       if (!module)
           return false;
    }
    else
       Py_INCREF(module);

That way the initSomeModule() function that called importModule will know that
the importing failed, and take the already present appropriate steps.

[1] http://docs.python.org/c-api/import.html#PyImport_ImportModule