Bug importer allows illegal tags to be created

[Renegade]

Good day,

the bug import format specification states that tags should be of kind lpname, and that lpname should be of the form [a-z0-9][a-z0-9\+\.\-]*.

When transferring our bugs to LP, I had the exporter auto-generate tags from the bug descriptions, to make them more accessible overall. This -of course- resulted not only in reasonable tags, but also in a few junk tags, including tags that are simply "0" (zero).

Since plain zero conforms to the regexp [a-z0-9][a-z0-9\+\.\-]*, the importer happily accepted these tags and we have 28 bugs tagged "0" in our list, making it the fifth most-used tag overall.

If, however, you actually *click* that tag, you get bounced to the search page, with the tag input field having the error "'0' isn't a valid tag name. Tags must start with a letter or number and be lowercase. The characters "+", "-" and "." are also allowed after the first character." (https://bugs.launchpad.net/ares/+bugs?field.tag=0)

Attempting the same with a single character yields the same result. (https://bugs.launchpad.net/ares/+bugs?field.tag=a)

So either the importer must reject single-letter tags, or the search function must allow searching for them. The way it is, single-letter tags hang in limbo, and the import specification is wrong.

[Curtis Hovey (sinzui)]

The Lp engineer who vetted the importer conversion and tested the output should have caught this issue.

[Renegade (renegade)]

Nah, he was awesome. I was very happy with him.
As said, it's a junk tag, we don't really care about it. I just thought I'd report it so it can be fixed sometime.

Happy New Year, everyone.