TypeError: can't compare offset-naive and offset-aware datetimes in getrruleset

[cpitclaudel]

Hi there,

The following example is responsible for the bug at https://github.com/Kozea/Radicale/issues/925 ; an event that has an UTC timestamp in EXDATE but plain dates as DTSTART and DTEND will cause an exception in getrruleset:

#!/usr/bin/env python3
import vobject

REPRO = """
BEGIN:VCALENDAR
PRODID:-//Google Inc//Google Calendar 70.9054//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH

BEGIN:VEVENT
DTSTART;VALUE=DATE:19910520
DTEND;VALUE=DATE:19910521
CREATED:20101031T171909Z
DESCRIPTION:
EXDATE;VALUE=DATE-TIME:20150520T000000Z
RRULE:FREQ=YEARLY;WKST=MO;UNTIL=20170519T235959Z;BYMONTH=5;BYMONTHDAY=20
SUMMARY:Test
END:VEVENT

END:VCALENDAR
"""

vobj = vobject.readOne(REPRO).vevent
for dt in vobj.getrruleset(addRDate=True):
    print(dt)

Traceback (most recent call last):
  File "./repro.py", line 25, in <module>
    for dt in vobj.getrruleset(addRDate=True):
  File "/home/clement/.local/lib/python3.6/site-packages/dateutil/rrule.py", line 1400, in _iter
    while exlist and exlist[0] < ritem:
  File "/home/clement/.local/lib/python3.6/site-packages/dateutil/rrule.py", line 1337, in __lt__
    return self.dt < other.dt
TypeError: can't compare offset-naive and offset-aware datetimes

This seems to be related to https://github.com/eventable/vobject/issues/75 (cc @htgoebel).

[h3xx]

Since this project is so stale (6 years at this point), I doubt you'll hear back about this issue.

I wonder if this is an issue in the current fork, py-vobject/vobject. (I say current because that's the source for what's currently published on PyPI.)

I have vobject 0.9.7 installed from PyPI and can confirm that the error you're seeing is still happening. Perhaps some commit has happened to master since that release to fix it.

[da4089]

I'm working with @skarim to reunite this repo with the fork. I'm hoping to make a new release that should address this problem soon.