A Haskell compiler whose implementation of Haskell has essentially become the language itself. They add lots of experimental features for their users to play around with, such as linear types it would seem. Language extensions like this might make it into the official language, but probably not. I'd say don't use it in production, but if you're using Haskell, you're probably an academic, hobbyist, or mad scientist.
To be honest I was 80% sure it was Haskell but I do hate acronyms being used without sufficient context for the average reader to understand them. The post should have had the word "Haskell" in it. It certainly helps understand what "linear types" probably means.
