try:
share.check(self)
except:
- log.err(None, 'Share check failed: %064x -> %064x' % (share.hash, share.previous_hash))
+ log.err(None, 'Share check failed: %064x -> %064x' % (share.hash, share.previous_hash if share.previous_hash is not None else 0))
return False
else:
self.verified.add(share)