Segmentation fault when exceptions of any kind happen within an object_hook in some situations #39

import msgpack

class TestObject:
    def _unpack(self, data):
        return msgpack.unpackb(data, object_hook=self._decode_unpack)

    def _decode_unpack(self, obj):
        raise Exception("test")

    def testrun_segfault(self):
        # msgpack-encoded version of {"test": "just sending some test data...", "number": 41, "file": open("test.py", "r")}
        # read custom encoding function that was used at the bottom
        encoded = "\x83\xa4test\xbejust sending some test data...\xa6number)\xa4file\x83\xa8__type__\xa4file\xa6__id__\x0b\xa8__size__\xcd\x02`"

        try:
            decoded = self._unpack(encoded)
        except:
            print "Exception (with segfault) happened successfully"

    def testrun_nosegfault(self):
        # msgpack-encoded version of {"test": "just sending some test data...", "number": 41}
        encoded = "\x82\xa4test\xbejust sending some test data...\xa6number)"

        try:
            decoded = self._unpack(encoded)
        except:
            print "Exception (without segfault) happened successfully"


test = TestObject()
print "Attempting testrun without segfault..."
test.testrun_nosegfault()
print "Attempting testrun with segfault..."
test.testrun_segfault()


''' Custom encoding code used to encode the data:

    def _pack(self, data):
        return msgpack.packb(data, default=self._encode_pack)

    def _encode_pack(self, obj):
        if hasattr(obj, "read"):
            datastream_id = self._create_datastream(obj)  # <- Unrelated project code

            # Determine the total size of the file
            current_pos = obj.tell()
            obj.seek(0, os.SEEK_END)
            total_size = obj.tell()
            obj.seek(current_pos)

            obj = {"__type__": "file", "__id__": datastream_id, "__size__": total_size}

        return obj
'''

[occupy@edge13 pyreactor]$ python ~/segfault.py 
Attempting testrun without segfault...
Exception (without segfault) happened successfully
Attempting testrun with segfault...
Segmentation fault (core dumped)