# Buggy code
def load_from_powershell(self):
    if not conf.prog.os_access:
        return
    ifaces_ips = None
    for i in get_windows_if_list():
        try:
            interface = NetworkInterface(i)
            self.data[interface.guid] = interface
            # If no IP address was detected using winpcap and if
            # the interface is not the loopback one, look for
            # internal windows interfaces
            if not interface.ip:
                if not ifaces_ips:  # ifaces_ips is used as a cache
                    ifaces_ips = get_ips()
                # If it exists, retrieve the interface's IP from the cache
                interface.ip = ifaces_ips.get(interface.name, "")[0]
        except (KeyError, PcapNameNotFoundError):
            pass

    if not self.data and conf.use_winpcapy:
        _detect = pcap_service_status()

        def _ask_user():
            if not conf.interactive:
                return False
            while True:
                _confir = (
                    input("Do you want to start it ? (yes/no) [y]: ").lower().strip()
                )  # noqa: E501
                if _confir in ["yes", "y", ""]:
                    return True
                elif _confir in ["no", "n"]:
                    return False
            return False

        _error_msg = "No match between your pcap and windows network interfaces found. "  # noqa: E501
        if (
            _detect[0]
            and not _detect[2]
            and not (hasattr(self, "restarted_adapter") and self.restarted_adapter)
        ):  # noqa: E501
            warning("Scapy has detected that your pcap service is not running !")  # noqa: E501
            if not conf.interactive or _ask_user():
                succeed = pcap_service_start(askadmin=conf.interactive)
                self.restarted_adapter = True
                if succeed:
                    log_loading.info("Pcap service started !")
                    self.load_from_powershell()
                    return
            _error_msg = "Could not start the pcap service ! "
        warning(
            _error_msg + "You probably won't be able to send packets. "
            "Deactivating unneeded interfaces and restarting Scapy might help. "  # noqa: E501
            "Check your winpcap and powershell installation, and access rights."
        )  # noqa: E501
    else:
        # Loading state: remove invalid interfaces
        self.remove_invalid_ifaces()
        # Replace LOOPBACK_INTERFACE
        try:
            scapy.consts.LOOPBACK_INTERFACE = self.dev_from_name(
                scapy.consts.LOOPBACK_NAME,
            )
        except ValueError:
            pass


# Traceback (IndexError)
from scapy.all import *
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "scapy\all.py", line 18, in <module>
from scapy.arch import *
File "scapy\arch\__init__.py", line 73, in <module>
from scapy.arch.windows import *  # noqa F403
File "scapy\arch\windows\__init__.py", line 953, in <module>
IFACES.load_from_powershell()
File "scapy\arch\windows\__init__.py", line 843, in load_from_powershell
interface.ip = ifaces_ips.get(interface.name, "")[0]
IndexError: string index out of range

# Fixed code
def load_from_powershell(self):
    if not conf.prog.os_access:
        return
    ifaces_ips = None
    for i in get_windows_if_list():
        try:
            interface = NetworkInterface(i)
            self.data[interface.guid] = interface
            # If no IP address was detected using winpcap and if
            # the interface is not the loopback one, look for
            # internal windows interfaces
            if not interface.ip:
                if not ifaces_ips:  # ifaces_ips is used as a cache
                    ifaces_ips = get_ips()
                # If it exists, retrieve the interface's IP from the cache
                interface.ip = ifaces_ips.get(interface.name, [""])[0]
        except (KeyError, PcapNameNotFoundError):
            pass

    if not self.data and conf.use_winpcapy:
        _detect = pcap_service_status()

        def _ask_user():
            if not conf.interactive:
                return False
            while True:
                _confir = (
                    input("Do you want to start it ? (yes/no) [y]: ").lower().strip()
                )  # noqa: E501
                if _confir in ["yes", "y", ""]:
                    return True
                elif _confir in ["no", "n"]:
                    return False
            return False

        _error_msg = "No match between your pcap and windows network interfaces found. "  # noqa: E501
        if (
            _detect[0]
            and not _detect[2]
            and not (hasattr(self, "restarted_adapter") and self.restarted_adapter)
        ):  # noqa: E501
            warning("Scapy has detected that your pcap service is not running !")  # noqa: E501
            if not conf.interactive or _ask_user():
                succeed = pcap_service_start(askadmin=conf.interactive)
                self.restarted_adapter = True
                if succeed:
                    log_loading.info("Pcap service started !")
                    self.load_from_powershell()
                    return
            _error_msg = "Could not start the pcap service ! "
        warning(
            _error_msg + "You probably won't be able to send packets. "
            "Deactivating unneeded interfaces and restarting Scapy might help. "  # noqa: E501
            "Check your winpcap and powershell installation, and access rights."
        )  # noqa: E501
    else:
        # Loading state: remove invalid interfaces
        self.remove_invalid_ifaces()
        # Replace LOOPBACK_INTERFACE
        try:
            scapy.consts.LOOPBACK_INTERFACE = self.dev_from_name(
                scapy.consts.LOOPBACK_NAME,
            )
        except ValueError:
            pass