sbt fails with java.lang.NoClassDefFoundError: sbt/ConsoleOut$
the only thing I remember doing was installing the new intellij (v13). Is this related?
It could be related.
rm -rf ~/.ivy/cache mv ~/.sbt ~/.sbt.old
Results in re-resolution of ivy artifacts on next compile, without having to clear the ivy cache.
If the ivy itself is the problem then above solution is a good fallback.
Most probably this issue comes from the IntelliJ IDE, Close all the running processes of the IDE and start it again.