If one creates a symlink with a .clj suffix that points to a cljs file, then the clojure compiler throws an exception that terminate cljsbuild auto's compile loop, but doesn't kill the process. The end result is that the user is left with a braindead process that they must manually kill and then restart, which is a little annoying and results in another 10+ second build.
Here's a stacktrace resulting from the thrown error: https://www.refheap.com/paste/4796.
Don't exit auto builds if reloading Clojure code fails.
This will go out in the 0.2.8 release.