gurudesh/pytracebugs huggingface dataset:
# Buggy code
def __init__(self, window=None):
    QObject.__init__(self)
    self.window = window
    self.reply = None
    self.status_code = -1
    self.on_cancel = lambda: None


# Traceback (UnboundLocalError)
INFO:Executor:Executing code with task id: 6f1c8ce3c6
ERROR   1551721422.95            tribler_window:67   (root)  Traceback (most recent call last):
File "TriblerGUI\widgets\tablecontentmodel.py", line 91, in data
File "TriblerGUI\widgets\tablecontentmodel.py", line 145, in <lambda>
File "TriblerGUI\utilities.py", line 99, in pretty_date
UnboundLocalError: local variable 'diff' referenced before assignment

# Fixed code
def __init__(self):
    QObject.__init__(self)
    self.reply = None
    self.status_code = -1
    self.on_cancel = lambda: None
# Buggy code
def on_finished(self, reply, capture_errors):
    self.status_code = reply.attribute(QNetworkRequest.HttpStatusCodeAttribute)
    request_queue.parse_queue()

    if not reply.isOpen() or not self.status_code:
        self.received_json.emit(None, reply.error())
        return

    data = reply.readAll()
    try:
        json_result = json.loads(str(data), encoding="latin_1")

        if (
            "error" in json_result
            and capture_errors
            and not self.window.core_manager.shutting_down
        ):
            self.show_error(TriblerRequestManager.get_message_from_error(json_result))
        else:
            self.received_json.emit(json_result, reply.error())
    except ValueError:
        self.received_json.emit(None, reply.error())
        logging.error("No json object could be decoded from data: %s" % data)

    # We disconnect the slot since we want the finished only to be emitted once. This allows us to reuse the
    # request manager.
    try:
        reply.finished.disconnect()
        self.received_json.disconnect()
    except TypeError:
        pass  # We probably didn't have any connected slots.

    try:
        reply.deleteLater()
    except RuntimeError:
        pass

    self.reply = None


# Traceback (UnboundLocalError)
INFO:Executor:Executing code with task id: 6f1c8ce3c6
ERROR   1551721422.95            tribler_window:67   (root)  Traceback (most recent call last):
File "TriblerGUI\widgets\tablecontentmodel.py", line 91, in data
File "TriblerGUI\widgets\tablecontentmodel.py", line 145, in <lambda>
File "TriblerGUI\utilities.py", line 99, in pretty_date
UnboundLocalError: local variable 'diff' referenced before assignment

# Fixed code
def on_finished(self, reply, capture_errors):
    self.status_code = reply.attribute(QNetworkRequest.HttpStatusCodeAttribute)
    request_queue.parse_queue()

    if not reply.isOpen() or not self.status_code:
        self.received_json.emit(None, reply.error())
        return

    data = reply.readAll()
    try:
        json_result = json.loads(str(data), encoding="latin_1")

        if (
            "error" in json_result
            and capture_errors
            and not TriblerRequestManager.window.core_manager.shutting_down
        ):
            self.show_error(TriblerRequestManager.get_message_from_error(json_result))
        else:
            self.received_json.emit(json_result, reply.error())
    except ValueError:
        self.received_json.emit(None, reply.error())
        logging.error("No json object could be decoded from data: %s" % data)

    # We disconnect the slot since we want the finished only to be emitted once. This allows us to reuse the
    # request manager.
    try:
        reply.finished.disconnect()
        self.received_json.disconnect()
    except TypeError:
        pass  # We probably didn't have any connected slots.

    try:
        reply.deleteLater()
    except RuntimeError:
        pass

    self.reply = None
# Buggy code
def on_finished(self, reply, capture_errors):
    self.status_code = reply.attribute(QNetworkRequest.HttpStatusCodeAttribute)
    request_queue.parse_queue()

    if not reply.isOpen() or not self.status_code:
        self.received_json.emit(None, reply.error())
        return

    data = reply.readAll()
    try:
        json_result = json.loads(str(data), encoding="latin_1")

        if "error" in json_result and capture_errors:
            self.show_error(TriblerRequestManager.get_message_from_error(json_result))
        else:
            self.received_json.emit(json_result, reply.error())
    except ValueError:
        self.received_json.emit(None, reply.error())
        logging.error("No json object could be decoded from data: %s" % data)

    # We disconnect the slot since we want the finished only to be emitted once. This allows us to reuse the
    # request manager.
    try:
        reply.finished.disconnect()
        self.received_json.disconnect()
    except TypeError:
        pass  # We probably didn't have any connected slots.

    try:
        reply.deleteLater()
    except RuntimeError:
        pass

    self.reply = None


# Traceback (AttributeError)
ERROR   1549719350.94              rest_manager:77   (RESTRequest)  [Failure instance: Traceback (failure with no frames): <type 'exceptions.Exception'>: Tribler is shutting down
]
Traceback (most recent call last):
File "/home/quinten/.local/lib/python2.7/site-packages/twisted/web/http.py", line 2880, in dataReceived
negotiatedProtocol = self._channel.transport.negotiatedProtocol
AttributeError: 'Server' object has no attribute 'negotiatedProtocol'

# Fixed code
def on_finished(self, reply, capture_errors):
    self.status_code = reply.attribute(QNetworkRequest.HttpStatusCodeAttribute)
    request_queue.parse_queue()

    if not reply.isOpen() or not self.status_code:
        self.received_json.emit(None, reply.error())
        return

    data = reply.readAll()
    try:
        json_result = json.loads(str(data), encoding="latin_1")

        if (
            "error" in json_result
            and capture_errors
            and not self.window.core_manager.shutting_down
        ):
            self.show_error(TriblerRequestManager.get_message_from_error(json_result))
        else:
            self.received_json.emit(json_result, reply.error())
    except ValueError:
        self.received_json.emit(None, reply.error())
        logging.error("No json object could be decoded from data: %s" % data)

    # We disconnect the slot since we want the finished only to be emitted once. This allows us to reuse the
    # request manager.
    try:
        reply.finished.disconnect()
        self.received_json.disconnect()
    except TypeError:
        pass  # We probably didn't have any connected slots.

    try:
        reply.deleteLater()
    except RuntimeError:
        pass

    self.reply = None
# Buggy code
def process_alert(self, alert, alert_type):
    if alert.category() in [
        lt.alert.category_t.error_notification,
        lt.alert.category_t.performance_warning,
    ]:
        self._logger.debug(
            "LibtorrentDownloadImpl: alert %s with message %s", alert_type, alert
        )

    alert_types = (
        "tracker_reply_alert",
        "tracker_error_alert",
        "tracker_warning_alert",
        "metadata_received_alert",
        "file_renamed_alert",
        "performance_alert",
        "torrent_checked_alert",
        "torrent_finished_alert",
        "save_resume_data_alert",
        "save_resume_data_failed_alert",
        "state_update_alert",
    )

    if alert_type in alert_types:
        getattr(self, "on_" + alert_type)(alert)


# Traceback (TypeError)
Traceback (most recent call last):
File "/usr/share/tribler/TriblerGUI/widgets/homepage.py", line 89, in received_popular_torrents
self.window().home_page_table_view.cellWidget(cur_ind % 3, cur_ind / 3).update_with_torrent(torrent)
File "/usr/share/tribler/TriblerGUI/widgets/home_recommended_item.py", line 90, in update_with_torrent
self.detail_label.setText("Size: " + format_size(torrent["size"]))
File "/usr/share/tribler/TriblerGUI/utilities.py", line 14, in format_size
if abs(num) < 1024.0:
TypeError: bad operand type for abs(): 'NoneType'

# Fixed code
def process_alert(self, alert, alert_type):
    if alert.category() in [
        lt.alert.category_t.error_notification,
        lt.alert.category_t.performance_warning,
    ]:
        self._logger.debug(
            "LibtorrentDownloadImpl: alert %s with message %s", alert_type, alert
        )

    alert_types = (
        "tracker_reply_alert",
        "tracker_error_alert",
        "tracker_warning_alert",
        "metadata_received_alert",
        "file_renamed_alert",
        "performance_alert",
        "torrent_checked_alert",
        "torrent_finished_alert",
        "save_resume_data_alert",
        "save_resume_data_failed_alert",
    )

    if alert_type in alert_types:
        getattr(self, "on_" + alert_type)(alert)
# Buggy code
def update_with_torrent(self, torrent):
    if not torrent:
        return
    self.show_torrent = True
    self.torrent_info = torrent
    self.thumbnail_widget.initialize(torrent["name"], HOME_ITEM_FONT_SIZE)
    self.main_label.setText(torrent["name"])
    self.category_label.setText(
        torrent["category"].lower()
        if ("category" in torrent and torrent["category"])
        else "other"
    )
    self.category_label.adjustSize()
    self.category_label.setHidden(False)
    self.setCursor(Qt.ArrowCursor)
    self.detail_label.setText("Size: " + format_size(torrent["size"]))


# Traceback (TypeError)
Traceback (most recent call last):
File "/usr/share/tribler/TriblerGUI/widgets/homepage.py", line 89, in received_popular_torrents
self.window().home_page_table_view.cellWidget(cur_ind % 3, cur_ind / 3).update_with_torrent(torrent)
File "/usr/share/tribler/TriblerGUI/widgets/home_recommended_item.py", line 90, in update_with_torrent
self.detail_label.setText("Size: " + format_size(torrent["size"]))
File "/usr/share/tribler/TriblerGUI/utilities.py", line 14, in format_size
if abs(num) < 1024.0:
TypeError: bad operand type for abs(): 'NoneType'

# Fixed code
def update_with_torrent(self, torrent):
    if not torrent:
        return
    self.show_torrent = True
    self.torrent_info = torrent
    self.thumbnail_widget.initialize(torrent["name"], HOME_ITEM_FONT_SIZE)
    self.main_label.setText(torrent["name"])
    self.category_label.setText(
        torrent["category"].lower()
        if ("category" in torrent and torrent["category"])
        else "other"
    )
    self.category_label.adjustSize()
    self.category_label.setHidden(False)
    self.setCursor(Qt.ArrowCursor)
    self.detail_label.setText("Size: " + format_size(torrent.get("size", 0)))
# Buggy code
def add_torrent(self, torrentdl, atp):
    # If we are collecting the torrent for this infohash, abort this first.
    with self.metainfo_lock:
        ltsession = self.get_session(atp.pop("hops", 0))

        if "ti" in atp:
            infohash = str(atp["ti"].info_hash())
        elif "url" in atp:
            infohash = binascii.hexlify(parse_magnetlink(atp["url"])[1])
        else:
            raise ValueError("No ti or url key in add_torrent_params")

        # Check if we added this torrent before
        known = [str(h.info_hash()) for h in ltsession.get_torrents()]
        if infohash in known:
            self.torrents[infohash] = (torrentdl, ltsession)
            infohash_bin = binascii.unhexlify(infohash)
            return succeed(ltsession.find_torrent(lt.big_number(infohash_bin)))

        if infohash in self.torrents:
            self._logger.info(
                "Torrent already exists in the downloads. Infohash:%s",
                infohash.encode("hex"),
            )

        # Otherwise, add it anew
        ltsession.async_add_torrent(encode_atp(atp))
        self.torrents[infohash] = (torrentdl, ltsession)
        self._logger.debug("Adding torrent %s", infohash)
        return torrentdl.deferred_added


# Traceback (RuntimeError)
Traceback (most recent call last):
File "TriblerGUI\event_request_manager.py", line 133, in on_read_data
RuntimeError: [Failure instance: Traceback: <type 'exceptions.AttributeError'>: 'NoneType' object has no attribute 'is_valid'
Tribler\Core\CreditMining\CreditMiningPolicy.py:243:run
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:997:restart
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:323:network_create_engine_wrapper
lib\site-packages\twisted\internet\defer.py:310:addCallbacks
--- <exception caught here> ---
lib\site-packages\twisted\internet\defer.py:653:_runCallbacks
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:298:on_torrent_added
]

# Fixed code
def add_torrent(self, torrentdl, atp):
    # If we are collecting the torrent for this infohash, abort this first.
    with self.metainfo_lock:
        ltsession = self.get_session(atp.pop("hops", 0))

        if "ti" in atp:
            infohash = str(atp["ti"].info_hash())
        elif "url" in atp:
            infohash = binascii.hexlify(parse_magnetlink(atp["url"])[1])
        else:
            raise ValueError("No ti or url key in add_torrent_params")

        # Check if we added this torrent before
        known = {str(h.info_hash()): h for h in ltsession.get_torrents()}
        existing_handle = known.get(infohash)
        if existing_handle:
            self.torrents[infohash] = (torrentdl, ltsession)
            return succeed(existing_handle)

        if infohash in self.torrents:
            self._logger.info(
                "Torrent already exists in the downloads. Infohash:%s",
                infohash.encode("hex"),
            )

        # Otherwise, add it anew
        ltsession.async_add_torrent(encode_atp(atp))
        self.torrents[infohash] = (torrentdl, ltsession)
        self._logger.debug("Adding torrent %s", infohash)
        return torrentdl.deferred_added
# Buggy code
def encode_atp(atp):
    for k, v in atp.iteritems():
        if isinstance(v, unicode):
            atp[k] = v.encode("utf-8")
    return atp


# Traceback (RuntimeError)
Traceback (most recent call last):
File "TriblerGUI\event_request_manager.py", line 133, in on_read_data
RuntimeError: [Failure instance: Traceback: <type 'exceptions.AttributeError'>: 'NoneType' object has no attribute 'is_valid'
Tribler\Core\CreditMining\CreditMiningPolicy.py:243:run
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:997:restart
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:323:network_create_engine_wrapper
lib\site-packages\twisted\internet\defer.py:310:addCallbacks
--- <exception caught here> ---
lib\site-packages\twisted\internet\defer.py:653:_runCallbacks
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:298:on_torrent_added
]

# Fixed code
def encode_atp(atp):
    for k, v in atp.iteritems():
        if isinstance(v, text_type):
            atp[k] = v.encode("utf-8")
    return atp
# Buggy code
def on_torrent_added(handle):
    self.handle = handle

    if self.handle.is_valid():
        self.set_selected_files()

        user_stopped = (
            pstate.get("download_defaults", "user_stopped") if pstate else False
        )

        # If we lost resume_data always resume download in order to force checking
        if not user_stopped or not resume_data:
            self.handle.resume()

            # If we only needed to perform checking, pause download after it is complete
            self.pause_after_next_hashcheck = user_stopped

        self.set_vod_mode(self.get_mode() == DLMODE_VOD)

        # Limit the amount of connections if we have specified that
        self.handle.set_max_connections(
            self.session.config.get_libtorrent_max_conn_download()
        )
        return self


# Traceback (RuntimeError)
Traceback (most recent call last):
File "TriblerGUI\event_request_manager.py", line 133, in on_read_data
RuntimeError: [Failure instance: Traceback: <type 'exceptions.AttributeError'>: 'NoneType' object has no attribute 'is_valid'
Tribler\Core\CreditMining\CreditMiningPolicy.py:243:run
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:997:restart
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:323:network_create_engine_wrapper
lib\site-packages\twisted\internet\defer.py:310:addCallbacks
--- <exception caught here> ---
lib\site-packages\twisted\internet\defer.py:653:_runCallbacks
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:298:on_torrent_added
]

# Fixed code
def on_torrent_added(handle):
    self.handle = handle

    if self.handle and self.handle.is_valid():
        self.set_selected_files()

        user_stopped = (
            pstate.get("download_defaults", "user_stopped") if pstate else False
        )

        # If we lost resume_data always resume download in order to force checking
        if not user_stopped or not resume_data:
            self.handle.resume()

            # If we only needed to perform checking, pause download after it is complete
            self.pause_after_next_hashcheck = user_stopped

        self.set_vod_mode(self.get_mode() == DLMODE_VOD)

        # Limit the amount of connections if we have specified that
        self.handle.set_max_connections(
            self.session.config.get_libtorrent_max_conn_download()
        )
        return self
# Buggy code
def schedule_downloads_timer(self, now=False):
    self.downloads_timer = QTimer()
    self.downloads_timer.setSingleShot(True)
    self.downloads_timer.timeout.connect(self.load_downloads)
    self.downloads_timer.start(0 if now else 1000)

    self.downloads_timeout_timer = QTimer()
    self.downloads_timeout_timer.setSingleShot(True)
    self.downloads_timeout_timer.timeout.connect(self.on_downloads_request_timeout)
    self.downloads_timeout_timer.start(16000)


# Traceback (TypeError)
ERROR:Executor:Tribler crashed after uptime of 4431.65499997 sec! Stack trace: Traceback (most recent call last):
File "TriblerGUI\widgets\tokenminingpage.py", line 167, in on_received_downloads
File "TriblerGUI\widgets\tokenminingpage.py", line 47, in compute_initial_figure
File "lib\site-packages\matplotlib\__init__.py", line 1898, in inner
File "lib\site-packages\matplotlib\axes\_axes.py", line 1407, in plot
File "lib\site-packages\matplotlib\axes\_base.py", line 1793, in add_line
File "lib\site-packages\matplotlib\axes\_base.py", line 1815, in _update_line_limits
File "lib\site-packages\matplotlib\lines.py", line 989, in get_path
File "lib\site-packages\matplotlib\lines.py", line 676, in recache
File "lib\site-packages\numpy\core\numeric.py", line 531, in asarray
TypeError: float() argument must be a string or a number

# Fixed code
def schedule_downloads_timer(self, now=False):
    self.downloads_timer = QTimer()
    self.downloads_timer.setSingleShot(True)
    self.downloads_timer.timeout.connect(self.load_downloads)
    self.downloads_timer.start(0 if now else self.REFRESH_INTERVAL_MS)

    self.downloads_timeout_timer = QTimer()
    self.downloads_timeout_timer.setSingleShot(True)
    self.downloads_timeout_timer.timeout.connect(self.on_downloads_request_timeout)
    self.downloads_timeout_timer.start(self.TIMEOUT_INTERVAL_MS)
# Buggy code
def load_downloads(self):
    url = "downloads?get_pieces=1"
    if time.time() - self.downloads_last_update > 30:
        self.downloads_last_update = time.time()
        self.downloads_request_mgr.cancel_request()
        self.downloads_request_mgr = TriblerRequestManager()
        self.downloads_request_mgr.perform_request(
            url, self.on_received_downloads, priority="LOW"
        )


# Traceback (TypeError)
ERROR:Executor:Tribler crashed after uptime of 4431.65499997 sec! Stack trace: Traceback (most recent call last):
File "TriblerGUI\widgets\tokenminingpage.py", line 167, in on_received_downloads
File "TriblerGUI\widgets\tokenminingpage.py", line 47, in compute_initial_figure
File "lib\site-packages\matplotlib\__init__.py", line 1898, in inner
File "lib\site-packages\matplotlib\axes\_axes.py", line 1407, in plot
File "lib\site-packages\matplotlib\axes\_base.py", line 1793, in add_line
File "lib\site-packages\matplotlib\axes\_base.py", line 1815, in _update_line_limits
File "lib\site-packages\matplotlib\lines.py", line 989, in get_path
File "lib\site-packages\matplotlib\lines.py", line 676, in recache
File "lib\site-packages\numpy\core\numeric.py", line 531, in asarray
TypeError: float() argument must be a string or a number

# Fixed code
def load_downloads(self):
    url = "downloads?get_pieces=1"
    if time.time() - self.downloads_last_update > self.REFRESH_INTERVAL_MS / 1000:
        self.downloads_last_update = time.time()
        self.downloads_request_mgr.cancel_request()
        self.downloads_request_mgr = TriblerRequestManager()
        self.downloads_request_mgr.perform_request(
            url, self.on_received_downloads, priority="LOW"
        )
# Buggy code
def push_data_to_plot(self, upload, download):
    # Keep only last 100 records to show in graph
    if len(self.plot_data[1]) > 100:
        self.plot_data[1] = self.plot_data[0][0][-100:]
        self.plot_data[0][0] = self.plot_data[0][0][-100:]
        self.plot_data[0][1] = self.plot_data[0][1][-100:]

    self.plot_data[1].append(datetime.datetime.now())
    self.plot_data[0][0].append(upload / self.byte_scale)
    self.plot_data[0][1].append(download / self.byte_scale)


# Traceback (TypeError)
ERROR:Executor:Tribler crashed after uptime of 4431.65499997 sec! Stack trace: Traceback (most recent call last):
File "TriblerGUI\widgets\tokenminingpage.py", line 167, in on_received_downloads
File "TriblerGUI\widgets\tokenminingpage.py", line 47, in compute_initial_figure
File "lib\site-packages\matplotlib\__init__.py", line 1898, in inner
File "lib\site-packages\matplotlib\axes\_axes.py", line 1407, in plot
File "lib\site-packages\matplotlib\axes\_base.py", line 1793, in add_line
File "lib\site-packages\matplotlib\axes\_base.py", line 1815, in _update_line_limits
File "lib\site-packages\matplotlib\lines.py", line 989, in get_path
File "lib\site-packages\matplotlib\lines.py", line 676, in recache
File "lib\site-packages\numpy\core\numeric.py", line 531, in asarray
TypeError: float() argument must be a string or a number

# Fixed code
def push_data_to_plot(self, upload, download):
    # Keep only last 100 records to show in graph
    if len(self.plot_data[1]) > 100:
        self.plot_data[1] = self.plot_data[1][-100:]
        self.plot_data[0][0] = self.plot_data[0][0][-100:]
        self.plot_data[0][1] = self.plot_data[0][1][-100:]

    self.plot_data[1].append(datetime.datetime.now())
    self.plot_data[0][0].append(upload / self.byte_scale)
    self.plot_data[0][1].append(download / self.byte_scale)
# Buggy code
def failed(self, msg=None):
    """
    This method handles everything that needs to be done when one step
    in the session has failed and thus no data can be obtained.
    """
    self._is_failed = True
    if self.result_deferred and not self.result_deferred.called:
        result_msg = "HTTP tracker failed for url %s" % self._tracker_url
        if msg:
            result_msg += " (error: %s)" % unicode(msg, errors="replace")
        self.result_deferred.errback(ValueError(result_msg))


# Traceback (RuntimeError)
Traceback (most recent call last):
File "TriblerGUI\event_request_manager.py", line 133, in on_read_data
RuntimeError: Unhandled Error
Traceback (most recent call last):
File "lib\site-packages\twisted\python\log.py", line 86, in callWithContext

File "lib\site-packages\twisted\python\context.py", line 122, in callWithContext

File "lib\site-packages\twisted\python\context.py", line 85, in callWithContext

File "lib\site-packages\twisted\internet\selectreactor.py", line 149, in _doReadOrWrite

--- <exception caught here> ---
File "lib\site-packages\twisted\internet\udp.py", line 249, in doRead

File "Tribler\Core\TorrentChecker\session.py", line 381, in datagramReceived

struct.error: unpack_from requires a buffer of at least 4 bytes

# Fixed code
def failed(self, msg=None):
    """
    This method handles everything that needs to be done when one step
    in the session has failed and thus no data can be obtained.
    """
    self._is_failed = True
    if self.result_deferred and not self.result_deferred.called:
        result_msg = "HTTP tracker failed for url %s" % self._tracker_url
        if msg:
            result_msg += " (error: %s)" % text_type(msg, errors="replace")
        self.result_deferred.errback(ValueError(result_msg))
# Buggy code
def datagramReceived(self, data, _):
    # Find the tracker session and give it the data
    transaction_id = struct.unpack_from("!i", data, 4)[0]
    if transaction_id in self.tracker_sessions:
        self.tracker_sessions.pop(transaction_id).handle_response(data)


# Traceback (RuntimeError)
Traceback (most recent call last):
File "TriblerGUI\event_request_manager.py", line 133, in on_read_data
RuntimeError: Unhandled Error
Traceback (most recent call last):
File "lib\site-packages\twisted\python\log.py", line 86, in callWithContext

File "lib\site-packages\twisted\python\context.py", line 122, in callWithContext

File "lib\site-packages\twisted\python\context.py", line 85, in callWithContext

File "lib\site-packages\twisted\internet\selectreactor.py", line 149, in _doReadOrWrite

--- <exception caught here> ---
File "lib\site-packages\twisted\internet\udp.py", line 249, in doRead

File "Tribler\Core\TorrentChecker\session.py", line 381, in datagramReceived

struct.error: unpack_from requires a buffer of at least 4 bytes

# Fixed code
def datagramReceived(self, data, _):
    # If the incoming data is valid, find the tracker session and give it the data
    if data and len(data) >= 4:
        transaction_id = struct.unpack_from("!i", data, 4)[0]
        if transaction_id in self.tracker_sessions:
            self.tracker_sessions.pop(transaction_id).handle_response(data)
# Buggy code
def failed(self, msg=None):
    """
    This method handles everything that needs to be done when one step
    in the session has failed and thus no data can be obtained.
    """
    if self.result_deferred and not self.result_deferred.called and not self._is_failed:
        result_msg = "UDP tracker failed for url %s" % self._tracker_url
        if msg:
            result_msg += " (error: %s)" % unicode(msg, errors="replace")
        self.result_deferred.errback(ValueError(result_msg))

    self._is_failed = True


# Traceback (RuntimeError)
Traceback (most recent call last):
File "TriblerGUI\event_request_manager.py", line 133, in on_read_data
RuntimeError: Unhandled Error
Traceback (most recent call last):
File "lib\site-packages\twisted\python\log.py", line 86, in callWithContext

File "lib\site-packages\twisted\python\context.py", line 122, in callWithContext

File "lib\site-packages\twisted\python\context.py", line 85, in callWithContext

File "lib\site-packages\twisted\internet\selectreactor.py", line 149, in _doReadOrWrite

--- <exception caught here> ---
File "lib\site-packages\twisted\internet\udp.py", line 249, in doRead

File "Tribler\Core\TorrentChecker\session.py", line 381, in datagramReceived

struct.error: unpack_from requires a buffer of at least 4 bytes

# Fixed code
def failed(self, msg=None):
    """
    This method handles everything that needs to be done when one step
    in the session has failed and thus no data can be obtained.
    """
    if self.result_deferred and not self.result_deferred.called and not self._is_failed:
        result_msg = "UDP tracker failed for url %s" % self._tracker_url
        if msg:
            result_msg += " (error: %s)" % text_type(msg, errors="replace")
        self.result_deferred.errback(ValueError(result_msg))

    self._is_failed = True
# Buggy code
def circuit_dead(self, broken_circuit):
    """
    When a circuit dies, we update the destinations dictionary and remove all peers that are affected.
    """
    counter = 0
    affected_destinations = set()
    for hops, destinations in self.destinations.iteritems():
        new_affected_destinations = set(
            destination
            for destination, tunnel_circuit in destinations.iteritems()
            if tunnel_circuit == broken_circuit
        )
        for destination in new_affected_destinations:
            if destination in self.destinations[hops]:
                del self.destinations[hops][destination]
                counter += 1

        affected_destinations.update(new_affected_destinations)

    if counter > 0:
        self._logger.debug("Deleted %d peers from destination list", counter)

    if broken_circuit.circuit_id in self.circuit_id_to_connection:
        self.circuit_id_to_connection.pop(broken_circuit.circuit_id, None)

    return affected_destinations


# Traceback (RuntimeError)
ERROR:Executor:********** TRIBLER CRASHED **********
ERROR:Executor:Tribler crashed after uptime of 21360.835 sec! Stack trace: Traceback (most recent call last):
File "TriblerGUI\event_request_manager.py", line 133, in on_read_data
RuntimeError: [Failure instance: Traceback: <type 'exceptions.RuntimeError'>: dictionary changed size during iteration
lib\threading.py:810:__bootstrap_inner
lib\threading.py:763:run
lib\site-packages\twisted\_threads\_threadworker.py:46:work
lib\site-packages\twisted\_threads\_team.py:190:doWork
--- <exception caught here> ---
lib\site-packages\twisted\python\threadpool.py:246:inContext
lib\site-packages\twisted\python\threadpool.py:262:<lambda>
lib\site-packages\twisted\python\context.py:118:callWithContext
lib\site-packages\twisted\python\context.py:81:callWithContext
Tribler\Core\APIImplementation\LaunchManyCore.py:834:sesscb_states_callback
Tribler\community\triblertunnel\community.py:519:monitor_downloads
Tribler\community\triblertunnel\community.py:387:remove_circuit
Tribler\community\triblertunnel\dispatcher.py:94:circuit_dead
Tribler\community\triblertunnel\dispatcher.py:94:<genexpr>
]

# Fixed code
def circuit_dead(self, broken_circuit):
    """
    When a circuit dies, we update the destinations dictionary and remove all peers that are affected.
    """
    counter = 0
    affected_destinations = set()
    for hops, destinations in self.destinations.items():
        new_affected_destinations = set(
            destination
            for destination, tunnel_circuit in destinations.items()
            if tunnel_circuit == broken_circuit
        )
        for destination in new_affected_destinations:
            if destination in self.destinations[hops]:
                del self.destinations[hops][destination]
                counter += 1

        affected_destinations.update(new_affected_destinations)

    if counter > 0:
        self._logger.debug("Deleted %d peers from destination list", counter)

    if broken_circuit.circuit_id in self.circuit_id_to_connection:
        self.circuit_id_to_connection.pop(broken_circuit.circuit_id, None)

    return affected_destinations
# Buggy code
def is_valid_asset_pair(assets_dict, amount_positive=True):
    if "first" not in assets_dict or "second" not in assets_dict:
        return False
    if "amount" not in assets_dict["first"] or "type" not in assets_dict["first"]:
        return False
    if "amount" not in assets_dict["second"] or "type" not in assets_dict["second"]:
        return False

    if not MarketBlock.has_required_types(
        [("amount", (int, long)), ("type", str)], assets_dict["first"]
    ):
        return False
    if not MarketBlock.has_required_types(
        [("amount", (int, long)), ("type", str)], assets_dict["second"]
    ):
        return False

    if amount_positive and (
        assets_dict["first"]["amount"] <= 0 or assets_dict["second"]["amount"] <= 0
    ):
        return False

    return True


# Traceback (RuntimeError)
Traceback (most recent call last):
File "/usr/share/tribler/TriblerGUI/event_request_manager.py", line 133, in on_read_data
raise RuntimeError(json_dict["event"]["text"])
RuntimeError: [Failure instance: Traceback: <class 'Tribler.pyipv8.ipv8.messaging.serialization.PackError'>: Could not pack item 7: ('I', 100000000000)
error: 'I' format requires 0 <= number <= 4294967295
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:653:_runCallbacks
/usr/share/tribler/Tribler/community/market/community.py:220:on_peers
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:459:callback
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:567:_startRunCallbacks
--- <exception caught here> ---
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:653:_runCallbacks
/usr/share/tribler/Tribler/community/market/community.py:836:on_peer_address
/usr/share/tribler/Tribler/pyipv8/ipv8/lazy_community.py:171:_ez_pack
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:270:pack_multiple
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:264:pack_multiple
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:248:pack
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:172:pack
]

# Fixed code
def is_valid_asset_pair(assets_dict, amount_positive=True):
    if "first" not in assets_dict or "second" not in assets_dict:
        return False
    if "amount" not in assets_dict["first"] or "type" not in assets_dict["first"]:
        return False
    if "amount" not in assets_dict["second"] or "type" not in assets_dict["second"]:
        return False

    if not MarketBlock.has_required_types(
        [("amount", integer_types), ("type", str)], assets_dict["first"]
    ):
        return False
    if not MarketBlock.has_required_types(
        [("amount", integer_types), ("type", str)], assets_dict["second"]
    ):
        return False

    if amount_positive and (
        assets_dict["first"]["amount"] <= 0 or assets_dict["second"]["amount"] <= 0
    ):
        return False

    return True
# Buggy code
def is_valid_tick(tick):
    """
    Verify whether a dictionary that contains a tick, is valid.
    """
    required_fields = [
        "trader_id",
        "order_number",
        "assets",
        "timeout",
        "timestamp",
        "traded",
    ]
    if not MarketBlock.has_fields(required_fields, tick):
        return False

    required_types = [
        ("trader_id", str),
        ("order_number", int),
        ("assets", dict),
        ("timestamp", float),
        ("timeout", int),
    ]

    if not MarketBlock.is_valid_trader_id(tick["trader_id"]):
        return False
    if not MarketBlock.is_valid_asset_pair(tick["assets"]):
        return False
    if not MarketBlock.has_required_types(required_types, tick):
        return False

    return True


# Traceback (RuntimeError)
Traceback (most recent call last):
File "/usr/share/tribler/TriblerGUI/event_request_manager.py", line 133, in on_read_data
raise RuntimeError(json_dict["event"]["text"])
RuntimeError: [Failure instance: Traceback: <class 'Tribler.pyipv8.ipv8.messaging.serialization.PackError'>: Could not pack item 7: ('I', 100000000000)
error: 'I' format requires 0 <= number <= 4294967295
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:653:_runCallbacks
/usr/share/tribler/Tribler/community/market/community.py:220:on_peers
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:459:callback
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:567:_startRunCallbacks
--- <exception caught here> ---
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:653:_runCallbacks
/usr/share/tribler/Tribler/community/market/community.py:836:on_peer_address
/usr/share/tribler/Tribler/pyipv8/ipv8/lazy_community.py:171:_ez_pack
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:270:pack_multiple
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:264:pack_multiple
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:248:pack
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:172:pack
]

# Fixed code
def is_valid_tick(tick):
    """
    Verify whether a dictionary that contains a tick, is valid.
    """
    required_fields = [
        "trader_id",
        "order_number",
        "assets",
        "timeout",
        "timestamp",
        "traded",
    ]
    if not MarketBlock.has_fields(required_fields, tick):
        return False

    required_types = [
        ("trader_id", str),
        ("order_number", int),
        ("assets", dict),
        ("timestamp", float),
        ("timeout", int),
    ]

    if not MarketBlock.is_valid_trader_id(tick["trader_id"]):
        return False
    if not MarketBlock.is_valid_asset_pair(tick["assets"]):
        return False
    if not MarketBlock.has_required_types(required_types, tick):
        return False
    if tick["timeout"] < 0 or tick["timeout"] > 3600 * 24:
        return False

    return True
# Buggy code
def __init__(self, wallet_address):
    """
    :param wallet_address: String representation of a wallet address
    :type wallet_address: str
    :raises ValueError: Thrown when one of the arguments are invalid
    """
    super(WalletAddress, self).__init__()

    if not isinstance(wallet_address, str):
        raise ValueError("Wallet address must be a string")

    self._wallet_address = wallet_address


# Traceback (RuntimeError)
Traceback (most recent call last):
File "/usr/share/tribler/TriblerGUI/event_request_manager.py", line 133, in on_read_data
raise RuntimeError(json_dict["event"]["text"])
RuntimeError: [Failure instance: Traceback: <class 'Tribler.pyipv8.ipv8.messaging.serialization.PackError'>: Could not pack item 7: ('I', 100000000000)
error: 'I' format requires 0 <= number <= 4294967295
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:653:_runCallbacks
/usr/share/tribler/Tribler/community/market/community.py:220:on_peers
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:459:callback
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:567:_startRunCallbacks
--- <exception caught here> ---
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:653:_runCallbacks
/usr/share/tribler/Tribler/community/market/community.py:836:on_peer_address
/usr/share/tribler/Tribler/pyipv8/ipv8/lazy_community.py:171:_ez_pack
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:270:pack_multiple
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:264:pack_multiple
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:248:pack
/usr/share/tribler/Tribler/pyipv8/ipv8/messaging/serialization.py:172:pack
]

# Fixed code
def __init__(self, wallet_address):
    """
    :param wallet_address: String representation of a wallet address
    :type wallet_address: str
    :raises ValueError: Thrown when one of the arguments are invalid
    """
    super(WalletAddress, self).__init__()

    if not isinstance(wallet_address, str):
        raise ValueError(
            "Wallet address must be a string, found %s instead" % type(wallet_address)
        )

    self._wallet_address = wallet_address
# Buggy code
def on_file_renamed_alert(self, alert):
    if (
        os.path.exists(self.unwanteddir_abs)
        and not os.listdir(self.unwanteddir_abs)
        and all(self.handle.file_priorities())
    ):
        os.rmdir(self.unwanteddir_abs)


# Traceback (RuntimeError)
ERROR   1545093433.24            tribler_window:68   (root)  Traceback (most recent call last):
File "TriblerGUI\event_request_manager.py", line 133, in on_read_data
RuntimeError: [Failure instance: Traceback: <type 'exceptions.AttributeError'>: 'LibtorrentDownloadImpl' object has no attribute 'unwanteddir_abs'
lib\site-packages\twisted\internet\base.py:1243:run
lib\site-packages\twisted\internet\base.py:1252:mainLoop
lib\site-packages\twisted\internet\base.py:878:runUntilCurrent
lib\site-packages\twisted\internet\task.py:239:__call__
--- <exception caught here> ---
lib\site-packages\twisted\internet\defer.py:150:maybeDeferred
Tribler\Core\Libtorrent\LibtorrentMgr.py:610:_task_process_alerts
Tribler\Core\Libtorrent\LibtorrentMgr.py:406:process_alert
Tribler\Core\Libtorrent\__init__.py:17:invoke_func
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:514:process_alert
Tribler\Core\Libtorrent\LibtorrentDownloadImpl.py:614:on_file_renamed_alert
]

# Fixed code
def on_file_renamed_alert(self, alert):
    unwanteddir_abs = os.path.join(
        self.get_save_path().decode("utf-8"), self.unwanted_directory_name
    )
    if (
        os.path.exists(unwanteddir_abs)
        and not os.listdir(unwanteddir_abs)
        and all(self.handle.file_priorities())
    ):
        os.rmdir(unwanteddir_abs)
# Buggy code
def do_payout(self, mid):
    """
    Perform a payout to a given mid. First, determine the outstanding balance. Then resolve the node in the DHT.
    """
    if mid not in self.tribler_peers:
        return

    total_bytes = 0
    for balance in self.tribler_peers[mid].itervalues():
        total_bytes += balance

    def on_nodes(nodes):
        self.logger.debug("Received %d nodes for DHT lookup", len(nodes))
        if nodes:
            self.bandwidth_wallet.trustchain.sign_block(
                nodes[0],
                public_key=nodes[0].public_key.key_to_bin(),
                block_type="tribler_bandwidth",
                transaction={"up": 0, "down": total_bytes},
            )

    if total_bytes >= 1024 * 1024:  # Do at least 1MB payouts
        self.logger.info(
            "Doing direct payout to %s (%d bytes)", mid.encode("hex"), total_bytes
        )
        self.dht.connect_peer(mid).addCallbacks(on_nodes, lambda _: on_nodes([]))

    # Remove the outstanding bytes; otherwise we will payout again
    self.tribler_peers.pop(mid, None)


# Traceback (RuntimeError)
Traceback (most recent call last):
File "/usr/share/tribler/TriblerGUI/event_request_manager.py", line 130, in on_read_data
raise RuntimeError(json_dict["event"]["text"])
RuntimeError: [Failure instance: Traceback (failure with no frames): <type 'exceptions.RuntimeError'>: Signature request timeout
]

# Fixed code
def do_payout(self, mid):
    """
    Perform a payout to a given mid. First, determine the outstanding balance. Then resolve the node in the DHT.
    """
    if mid not in self.tribler_peers:
        return

    total_bytes = 0
    for balance in self.tribler_peers[mid].itervalues():
        total_bytes += balance

    def on_nodes(nodes):
        self.logger.debug("Received %d nodes for DHT lookup", len(nodes))
        if nodes:
            deferred = self.bandwidth_wallet.trustchain.sign_block(
                nodes[0],
                public_key=nodes[0].public_key.key_to_bin(),
                block_type="tribler_bandwidth",
                transaction={"up": 0, "down": total_bytes},
            )
            addCallback(deferred, lambda _: None)

    if total_bytes >= 1024 * 1024:  # Do at least 1MB payouts
        self.logger.info(
            "Doing direct payout to %s (%d bytes)", mid.encode("hex"), total_bytes
        )
        self.dht.connect_peer(mid).addCallbacks(on_nodes, lambda _: on_nodes([]))

    # Remove the outstanding bytes; otherwise we will payout again
    self.tribler_peers.pop(mid, None)
# Buggy code
def on_nodes(nodes):
    self.logger.debug("Received %d nodes for DHT lookup", len(nodes))
    if nodes:
        self.bandwidth_wallet.trustchain.sign_block(
            nodes[0],
            public_key=nodes[0].public_key.key_to_bin(),
            block_type="tribler_bandwidth",
            transaction={"up": 0, "down": total_bytes},
        )


# Traceback (RuntimeError)
Traceback (most recent call last):
File "/usr/share/tribler/TriblerGUI/event_request_manager.py", line 130, in on_read_data
raise RuntimeError(json_dict["event"]["text"])
RuntimeError: [Failure instance: Traceback (failure with no frames): <type 'exceptions.RuntimeError'>: Signature request timeout
]

# Fixed code
def on_nodes(nodes):
    self.logger.debug("Received %d nodes for DHT lookup", len(nodes))
    if nodes:
        deferred = self.bandwidth_wallet.trustchain.sign_block(
            nodes[0],
            public_key=nodes[0].public_key.key_to_bin(),
            block_type="tribler_bandwidth",
            transaction={"up": 0, "down": total_bytes},
        )
        addCallback(deferred, lambda _: None)
# Buggy code
def create_transfer_block(self, peer, quantity):
    transaction = {"up": 0, "down": int(quantity * MEGA_DIV)}
    self.trustchain.sign_block(
        peer,
        peer.public_key.key_to_bin(),
        block_type="tribler_bandwidth",
        transaction=transaction,
    )
    latest_block = self.trustchain.persistence.get_latest(
        self.trustchain.my_peer.public_key.key_to_bin(), block_type="tribler_bandwidth"
    )
    txid = "%s.%s.%d.%d" % (
        latest_block.public_key.encode("hex"),
        latest_block.sequence_number,
        0,
        int(quantity * MEGA_DIV),
    )

    self.transaction_history.append(
        {
            "id": txid,
            "outgoing": True,
            "from": self.get_address(),
            "to": b64encode(peer.public_key.key_to_bin()),
            "amount": quantity,
            "fee_amount": 0.0,
            "currency": self.get_identifier(),
            "timestamp": "",
            "description": "",
        }
    )

    return succeed(txid)


# Traceback (RuntimeError)
Traceback (most recent call last):
File "/usr/share/tribler/TriblerGUI/event_request_manager.py", line 130, in on_read_data
raise RuntimeError(json_dict["event"]["text"])
RuntimeError: [Failure instance: Traceback (failure with no frames): <type 'exceptions.RuntimeError'>: Signature request timeout
]

# Fixed code
def create_transfer_block(self, peer, quantity):
    transaction = {"up": 0, "down": int(quantity * MEGA_DIV)}
    deferred = self.trustchain.sign_block(
        peer,
        peer.public_key.key_to_bin(),
        block_type="tribler_bandwidth",
        transaction=transaction,
    )
    addCallback(deferred, lambda _: None)
    latest_block = self.trustchain.persistence.get_latest(
        self.trustchain.my_peer.public_key.key_to_bin(), block_type="tribler_bandwidth"
    )
    txid = "%s.%s.%d.%d" % (
        latest_block.public_key.encode("hex"),
        latest_block.sequence_number,
        0,
        int(quantity * MEGA_DIV),
    )

    self.transaction_history.append(
        {
            "id": txid,
            "outgoing": True,
            "from": self.get_address(),
            "to": b64encode(peer.public_key.key_to_bin()),
            "amount": quantity,
            "fee_amount": 0.0,
            "currency": self.get_identifier(),
            "timestamp": "",
            "description": "",
        }
    )

    return succeed(txid)
# Buggy code
def flush(self):
    if self._pending_torrents:
        write_batch = self._writebatch(self._db)
        for k, v in self._pending_torrents.iteritems():
            write_batch.Put(k, v)
        self._pending_torrents.clear()
        return self._db.Write(write_batch)


# Traceback (RuntimeError)
Traceback (most recent call last):
File "TriblerGUI\event_request_manager.py", line 130, in on_read_data
RuntimeError: [Failure instance: Traceback: <class 'plyvel._plyvel.IOError'>: IO error: C:\Users\Blake\AppData\Roaming\.Tribler\collected_torrents\000263.ldb: Could not create random access file.
lib\site-packages\twisted\internet\base.py:1243:run
lib\site-packages\twisted\internet\base.py:1252:mainLoop
lib\site-packages\twisted\internet\base.py:878:runUntilCurrent
lib\site-packages\twisted\internet\task.py:239:__call__
--- <exception caught here> ---
lib\site-packages\twisted\internet\defer.py:150:maybeDeferred
Tribler\Core\leveldbstore.py:141:flush
Tribler\Core\plyveladapter.py:25:Write
plyvel\_plyvel.pyx:599:plyvel._plyvel.WriteBatch.write (plyvel/_plyvel.cpp:9519)
plyvel\_plyvel.pyx:80:plyvel._plyvel.raise_for_status (plyvel/_plyvel.cpp:1689)
]

# Fixed code
def flush(self, retry=3, write_batch=None):
    if not write_batch and self._pending_torrents:
        write_batch = self._writebatch(self._db)
        for k, v in self._pending_torrents.iteritems():
            write_batch.Put(k, v)
        self._pending_torrents.clear()

    if write_batch:
        if not retry:
            self._logger.error("Failed to flush LevelDB cache. Max retry done.")
            return
        try:
            self._db.Write(write_batch)
        except Exception as ex:
            self._logger.error(
                "Failed to flush LevelDB cache. Will retry %s times. Error:%s",
                retry - 1,
                ex,
            )
            self.flush(retry=retry - 1, write_batch=write_batch)