(This bug is for the es branch.) Hitting Return to force a search for a shorter string than 3 chars causes all lines in the project to be returned. That's not useful. Since we can't do such a search with our trigram indexing, let's just refuse to do the search altogether, mirroring our AJAX search behavior when 2 chars are entered (which shows a bubble explaining that at least 3 chars are required to do a search).
Can't reproduce any more, did we fix this in https://github.com/mozilla/dxr/pull/422?
It is likely. Hooray for fewer code paths. And thanks for the ticket gardening, Peter! :-D