When running `show lldp neighbors` and when the response from `lldpd` a neighbor does not have a `desc` a TypeError is thrown
```
yzguy@border1:~$ show lldp neighbors
Traceback (most recent call last):
File "/usr/libexec/vyos/op_mode/lldp.py", line 144, in <module>
res = vyos.opmode.run(sys.modules[__name__])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/vyos/opmode.py", line 263, in run
res = func(**args)
^^^^^^^^^^^^
File "/usr/libexec/vyos/op_mode/lldp.py", line 44, in _wrapper
return func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^
File "/usr/libexec/vyos/op_mode/lldp.py", line 140, in show_neighbors
return _get_formatted_output(lldp_data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/libexec/vyos/op_mode/lldp.py", line 117, in _get_formatted_output
tmp.append(platform[:37])
~~~~~~~~^^^^^
TypeError: 'NoneType' object is not subscriptable
```
Looking at the `lldpctl -f json` output for the device erroring we see
```
{
"lldp": {
"interface": {
"eth1": {
"via": "LLDP",
"rid": "3",
"age": "0 day, 00:01:21",
"chassis": {
"spine1": {
"id": {
"type": "mac",
"value": "50:00:00:d7:ee:0b"
},
"mgmt-ip": "172.99.0.1",
"mgmt-iface": "5000000",
"capability": [
{
"type": "Bridge",
"enabled": true
},
{
"type": "Router",
"enabled": true
}
]
}
},
"port": {
"id": {
"type": "ifname",
"value": "Ethernet8"
},
"ttl": "120",
"mfs": "9236"
},
"lldp-med": {
"device-type": "Network Connectivity Device",
"capability": {
"type": "Capabilities",
"available": true
}
}
}
}
}
}
```
Whereas on a working output we see the `desc`
```
{
"lldp": {
"interface": {
"eth4": {
"via": "LLDP",
"rid": "2",
"age": "30 days, 16:56:09",
"chassis": {
"switch": {
"id": {
"type": "mac",
"value": "b0:a8:6e:8e:29:c0"
},
"descr": "Juniper Networks, Inc. ex3300-48p , version 12.3R12-S21 Build date: 2022-03-02 16:28:50 UTC ",
...
}
```
Looking at Line 116/117 of `vyos/op_mode/lldp.py`, we see
```
# Remote software platform
platform = jmespath.search('chassis.[*][0][0].descr', values)
tmp.append(platform[:37])
```
Which has no logic to handle if `platform` is None, which could be as simple as
```
tmp.append(platform[:37]) if platform else tmp.append('')
```