For what it's worth, I put out a new version of List::BinarySearch today. The difference is subtle, and probably unimportant: In the previous version there was always a custom import, and that function did different things based on the Perl version number. In the new version there is only a custom import under versions of Perl that need it. The rest of the time we just accept what Exporter gives us.

It still uses the goto &... idiom; calling through SUPER proved to be a little too fragile for our needs.