374 PyObject* decode_string(
375 		PyObject* self, 
376 		PyObject* args, 
377 		PyObject* kwds
378 		)
379 {
380 	PyObject *Py_input_string;
381 	PyObject *Py_output_string;
382 	PyObject *retval;
383 	
384 	char *input_buffer = NULL;
385 	char *output_buffer = NULL;
386 	long crc_value = -1L;
387 	int input_len = 0;
388 	int output_len = 0;
389 	int escape = 0;
390 	Crc32 crc;
391 	
392 	static char *kwlist[] = { "string", "crc32", "escape", NULL };
393 	if(!PyArg_ParseTupleAndKeywords(args, 
394 				kwds,
when PyArg_ParseTupleAndKeywords() succeeds
taking False path
395 				"O!|ii", 
396 				kwlist,
397 				&PyString_Type,
398 				&Py_input_string, 
399 				&crc_value,
400 				&escape
401 				)) 
402 		return NULL;
403 	crc_init(&crc, crc_value);
404 	input_len = PyString_Size(Py_input_string);
405 	input_buffer = PyString_AsString(Py_input_string);
when PyString_Size() succeeds
406 	output_buffer = (char *) malloc( input_len );
when PyString_AsString() succeeds
407 	output_len = decode_buffer(input_buffer, output_buffer, input_len, &crc, &escape);
408 	Py_output_string = PyString_FromStringAndSize(output_buffer, output_len);
409 	retval = Py_BuildValue("(S,i,i)", Py_output_string, crc.crc, escape);
when PyString_FromStringAndSize() fails
410 	
when Py_BuildValue() fails
411 	free(output_buffer);
412 	Py_DECREF(Py_output_string);
413 
dereferencing NULL (Py_output_string->ob_refcnt) at src/_yenc.c:413
found 3 similar trace(s) to this
414 	return retval;
415 }
416