Firewall disable timer errors out

[virtualdxs]

Qubes OS version:

R4.0

Affected component(s):

Firewall

When you temporarily disable the outgoing firewall, it fails and errors in the systemd journal.

Traceback from journalctl:

Jul 19 19:58:09 dom0 qubesd[1399]: unhandled exception while calling src=b'dom0' meth=b'admin.vm.firewall.Set' dest=b'build' arg=b'' le
Jul 19 19:58:09 dom0 qubesd[1399]: Traceback (most recent call last):
Jul 19 19:58:09 dom0 qubesd[1399]:   File "/usr/lib/python3.5/site-packages/qubes/api/__init__.py", line 262, in respond
Jul 19 19:58:09 dom0 qubesd[1399]:     untrusted_payload=untrusted_payload)
Jul 19 19:58:09 dom0 qubesd[1399]:   File "/usr/lib64/python3.5/asyncio/futures.py", line 381, in __iter__
Jul 19 19:58:09 dom0 qubesd[1399]:     yield self  # This tells Task to wait for completion.
Jul 19 19:58:09 dom0 qubesd[1399]:   File "/usr/lib64/python3.5/asyncio/tasks.py", line 310, in _wakeup
Jul 19 19:58:09 dom0 qubesd[1399]:     future.result()
Jul 19 19:58:09 dom0 qubesd[1399]:   File "/usr/lib64/python3.5/asyncio/futures.py", line 294, in result
Jul 19 19:58:09 dom0 qubesd[1399]:     raise self._exception
Jul 19 19:58:09 dom0 qubesd[1399]:   File "/usr/lib64/python3.5/asyncio/tasks.py", line 240, in _step
Jul 19 19:58:09 dom0 qubesd[1399]:     result = coro.send(None)
Jul 19 19:58:09 dom0 qubesd[1399]:   File "/usr/lib64/python3.5/asyncio/coroutines.py", line 210, in coro
Jul 19 19:58:09 dom0 qubesd[1399]:     res = func(*args, **kw)
Jul 19 19:58:09 dom0 qubesd[1399]:   File "/usr/lib/python3.5/site-packages/qubes/api/admin.py", line 1265, in vm_firewall_set
Jul 19 19:58:09 dom0 qubesd[1399]:     self.dest.firewall.save()
Jul 19 19:58:09 dom0 qubesd[1399]:   File "/usr/lib/python3.5/site-packages/qubes/firewall.py", line 570, in save
Jul 19 19:58:09 dom0 qubesd[1399]:     nearest_expire:
Jul 19 19:58:09 dom0 qubesd[1399]: TypeError: unorderable types: datetime.datetime() < bool()

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Steps to reproduce the behavior:

1. Open edit qube firewall settings
2. Select limit outgoing connections
3. Check allow full access
4. Click ok

Expected behavior:

Allows all outbound access for VM for next 5 min

Actual behavior:

Error message in journal