Bug#848403: diffoscope: FTBFS randomly (Fatal Python error: deallocating None)

[Santiago Vila]

Version: 67

Hi.

After building this version on stretch today 201 times, with different
autobuilders, the result was 200 successful builds and one sbuild hang.

Compared to the previous 10% failure rate, the sbuild hang is most
likely a completely different issue, so I hereby declare this bug as
"most probably fixed".

Thanks.