Comment 2 for bug 508794

Yes, you are right. rmadison (the tool) doesn't like sid for suite:
$ rmadison -u debian -a source -s sid skanlite
Traceback (most recent call last):
  File "/usr/local/bin/dak", line 238, in <module>
    main()
  File "/usr/local/bin/dak", line 218, in main
    module.main()
  File "/srv/ftp.debian.org/dak/dak/ls.py", line 106, in main
    utils.parse_args(Options)
  File "/srv/ftp.debian.org/dak/dak/daklib/utils.py", line 979, in parse_args
    if suite.suite_id is None:
AttributeError: 'NoneType' object has no attribute 'suite_id'

The return code is still 0 (else it would trigger an assertation error).
The "fix" is to map "sid" back to "unstable".