The following crashes with Python 3.8b3

```
import sys
import pytz
import datetime

print(sys.version_info)
print(pytz.__version__)
print(datetime.timezone.utc == pytz.utc)
```

When run with `-X faulthandler`, I see

```
sys.version_info(major=3, minor=8, micro=0, releaselevel='beta', serial=3)
2019.2
Fatal Python error: Segmentation fault

Current thread 0x00000001138dc5c0 (most recent call first):
  File "foo.py", line 8 in <module>
Segmentation fault: 11
```