rtomayko/tilt — pull request #158 by thinkerbot (2012-11-29 05:16:34+00:00)
Title: Restrict locals to valid variable names

Local keys are evaluated as ruby meaning all kinds of shenanigans are possible unless the keys are filtered. Restricting them to variable names seems safe and reasonable.

I ran across this when accidentally passing something like `A/B` as a key, which failed trying to divide missing constants.