# Buggy code
def read_value(hive, key, vname=None, use_32bit_registry=False):
    r"""
    Reads a registry value entry or the default value for a key.

    :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.

    :param str vname: The value name. These are the individual name/data pairs
       under the key. If not passed, the key (Default) value will be returned

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

    :return: A dictionary containing the passed settings as well as the
       value_data if successful. If unsuccessful, sets success to False.

    :rtype: dict

    If vname is not passed:

    - Returns the first unnamed value (Default) as a string.
    - Returns none if first unnamed value is empty.
    - Returns False if key not found.

    CLI Example:

    .. code-block:: bash

        salt '*' reg.read_value HKEY_LOCAL_MACHINE 'SOFTWARE\Salt' 'version'
    """

    # If no name is passed, the default value of the key will be returned
    # The value name is Default

    # Setup the return array
    if PY2:
        ret = {
            "hive": _mbcs_to_unicode(hive),
            "key": _mbcs_to_unicode(key),
            "vname": _mbcs_to_unicode(vname),
            "vdata": None,
            "success": True,
        }
        local_hive = _mbcs_to_unicode(hive)
        local_key = _unicode_to_mbcs(key)
        local_vname = _unicode_to_mbcs(vname)

    else:
        ret = {"hive": hive, "key": key, "vname": vname, "vdata": None, "success": True}
        local_hive = hive
        local_key = key
        local_vname = vname

    if not vname:
        ret["vname"] = "(Default)"

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

    try:
        handle = _winreg.OpenKey(hkey, local_key, 0, access_mask)
        try:
            # QueryValueEx returns unicode data
            vdata, vtype = _winreg.QueryValueEx(handle, local_vname)
            if vdata or vdata in [0, ""]:
                ret["vtype"] = registry.vtype_reverse[vtype]
                ret["vdata"] = vdata
            else:
                ret["comment"] = "Empty Value"
        except WindowsError:  # pylint: disable=E0602
            ret["vdata"] = "(value not set)"
            ret["vtype"] = "REG_SZ"
    except WindowsError as exc:  # pylint: disable=E0602
        log.debug(exc)
        log.debug("Cannot find key: {0}\\{1}".format(local_hive, local_key))
        ret["comment"] = "Cannot find key: {0}\\{1}".format(local_hive, local_key)
        ret["success"] = False
    return ret


# 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 read_value(hive, key, vname=None, use_32bit_registry=False):
    r"""
    Reads a registry value entry or the default value for a key.

    :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.

    :param str vname: The value name. These are the individual name/data pairs
       under the key. If not passed, the key (Default) value will be returned

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

    :return: A dictionary containing the passed settings as well as the
       value_data if successful. If unsuccessful, sets success to False.

    :rtype: dict

    If vname is not passed:

    - Returns the first unnamed value (Default) as a string.
    - Returns none if first unnamed value is empty.
    - Returns False if key not found.

    CLI Example:

    .. code-block:: bash

        salt '*' reg.read_value HKEY_LOCAL_MACHINE 'SOFTWARE\Salt' 'version'
    """
    # If no name is passed, the default value of the key will be returned
    # The value name is Default

    # Setup the return array
    local_hive = _to_unicode(hive)
    local_key = _to_unicode(key)
    local_vname = _to_unicode(vname)

    ret = {
        "hive": local_hive,
        "key": local_key,
        "vname": local_vname,
        "vdata": None,
        "success": True,
    }

    if not vname:
        ret["vname"] = "(Default)"

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

    try:
        handle = win32api.RegOpenKeyEx(hkey, local_key, 0, access_mask)
        try:
            # RegQueryValueEx returns and accepts unicode data
            vdata, vtype = win32api.RegQueryValueEx(handle, local_vname)
            if vdata or vdata in [0, ""]:
                ret["vtype"] = registry.vtype_reverse[vtype]
                if vtype == 7:
                    ret["vdata"] = [_to_mbcs(i) for i in vdata]
                else:
                    ret["vdata"] = _to_mbcs(vdata)
            else:
                ret["comment"] = "Empty Value"
        except WindowsError:  # pylint: disable=E0602
            ret["vdata"] = "(value not set)"
            ret["vtype"] = "REG_SZ"
    except pywintypes.error as exc:  # pylint: disable=E0602
        log.debug(exc)
        log.debug("Cannot find key: {0}\\{1}".format(local_hive, local_key))
        ret["comment"] = "Cannot find key: {0}\\{1}".format(local_hive, local_key)
        ret["success"] = False
    return ret