The error can be reproduced reliably as follows:
Build any snap with grade:devel.
snapcraft login snapcraft upload --release=candidate "snap name"
Wait for the error.
... No revision information for XX ...
The error can be reproduced reliably as follows:
Build any snap with grade:devel.
snapcraft login
snapcraft upload --release=candidate "snap name"
Wait for the error.
...
No revision information for XX
...