slightlyoff/cassowary.js — pull request #65 by underscorediscovery (2014-12-18 00:28:44+00:00)
Title: Solver - insertErrorVar look up on incorrect value

Ran into a type error here when porting, it is fetching from a Map of
Constraint:Set and instead was passing in an AbstractVariable. This
seems accidental - if you notice what would happen is every single time
a new set is created (because the result is never found), this also
probably makes garbage as a side effect.