# Buggy code
def list_keys(hive, key=None, use_32bit_registry=False):
    """
    Enumerates the subkeys in a registry key or hive.

    :param str hive: The name of the hive. Can be one of the following

        - HKEY_LOCAL_MACHINE or HKLM
        - HKEY_CURRENT_USER or HKCU
        - HKEY_USER or HKU

    :param str key: The key (looks like a path) to the value name. If a key is
        not passed, the keys under the hive will be returned.

    :param bool use_32bit_registry: Accesses the 32bit portion of the registry
        on 64 bit installations. On 32bit machines this is ignored.

    :return: A list of keys/subkeys under the hive or key.
    :rtype: list

    CLI Example:

    .. code-block:: bash

        salt '*' reg.list_keys HKLM 'SOFTWARE'
    """

    if PY2:
        local_hive = _mbcs_to_unicode(hive)
        local_key = _unicode_to_mbcs(key)
    else:
        local_hive = hive
        local_key = key

    registry = Registry()
    hkey = registry.hkeys[local_hive]
    access_mask = registry.registry_32[use_32bit_registry]

    subkeys = []
    try:
        handle = _winreg.OpenKey(hkey, local_key, 0, access_mask)

        for i in range(_winreg.QueryInfoKey(handle)[0]):
            subkey = _winreg.EnumKey(handle, i)
            if PY2:
                subkeys.append(_mbcs_to_unicode(subkey))
            else:
                subkeys.append(subkey)

        handle.Close()

    except WindowsError as exc:  # pylint: disable=E0602
        log.debug(exc)
        log.debug("Cannot find key: {0}\\{1}".format(hive, key))
        return False, "Cannot find key: {0}\\{1}".format(hive, key)

    return subkeys


# Traceback (CommandExecutionError)
windows_host:
----------
ID: lgpo_test
Function: lgpo.set
Result: False
Comment: An exception occurred in this state: Traceback (most recent call last):
File "c:\salt\bin\lib\site-packages\salt\state.py", line 1765, in call
**cdata['kwargs'])
File "c:\salt\bin\lib\site-packages\salt\loader.py", line 1705, in wrapper
return f(*args, **kwargs)
File "c:\salt\bin\lib\site-packages\salt\states\win_lgpo.py", line 294, in set_
adml_language=adml_language)
File "c:\salt\bin\lib\site-packages\salt\modules\win_lgpo.py", line 5348, in set_
raise CommandExecutionError(msg.format(regedit))
CommandExecutionError: Error while attempting to set policy Domain controller: Allow server operators to schedule tasks via the registry.  Some changes may not be applied as expected
Started: 15:33:50.693000
Duration: 1578.0 ms
Changes:

Summary for windoze
------------
Succeeded: 0
Failed:    1

# Fixed code
def list_keys(hive, key=None, use_32bit_registry=False):
    """
    Enumerates the subkeys in a registry key or hive.

    :param str hive: The name of the hive. Can be one of the following

        - HKEY_LOCAL_MACHINE or HKLM
        - HKEY_CURRENT_USER or HKCU
        - HKEY_USER or HKU

    :param str key: The key (looks like a path) to the value name. If a key is
        not passed, the keys under the hive will be returned.

    :param bool use_32bit_registry: Accesses the 32bit portion of the registry
        on 64 bit installations. On 32bit machines this is ignored.

    :return: A list of keys/subkeys under the hive or key.
    :rtype: list

    CLI Example:

    .. code-block:: bash

        salt '*' reg.list_keys HKLM 'SOFTWARE'
    """

    local_hive = _to_unicode(hive)
    local_key = _to_unicode(key)

    registry = Registry()
    hkey = registry.hkeys[local_hive]
    access_mask = registry.registry_32[use_32bit_registry]

    subkeys = []
    try:
        handle = win32api.RegOpenKeyEx(hkey, local_key, 0, access_mask)

        for i in range(win32api.RegQueryInfoKey(handle)[0]):
            subkey = win32api.RegEnumKey(handle, i)
            if PY2:
                subkeys.append(_to_unicode(subkey))
            else:
                subkeys.append(subkey)

        handle.Close()

    except WindowsError as exc:  # pylint: disable=E0602
        log.debug(exc)
        log.debug("Cannot find key: {0}\\{1}".format(hive, key))
        return False, "Cannot find key: {0}\\{1}".format(hive, key)

    return subkeys