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Looks like it's abandoned, unfortunately. A lot of latest issues don't have labels or comments from authors, and some fixes of crashes like this one are not released, although they're fixed in test builds.
Take a look on alternatives here, some of them are quite good, however I still can't find something that would work as good as Sequel Pro with my setup. It's a pity that such a project is dead.
I really wish that someone could track down one of the organizers and get the project and funds handed off to an entity that can properly maintain it. This is a huge blow to F/OSS and I think we'd all rather donate to making this work; just need to make sure the funds are falling into the right hands.