sbt 0.12.4 - there were x feature warning(s); re-run with -feature for details

Question

I get an error there were 15 feature warning(s); re-run with -feature for details :

$ /usr/local/sbt/bin/sbt
[info] Loading project definition fr         


        

Answer 1

You should add

scalacOptions += "-feature"

to your build.sbt and execute reload if your sbt console is running (or restart it).

Alternatively if you want to set it only for a single session, while in sbt console, you can write set scalacOptions += "-feature", this setting is applied immediately, no need to reload or restart sbt console.

Re-run with -feature for details